ENGINEERING DRILLING

Tuesday, 30 April 2019

ELECTRICIAN THEORY SEMESTER-1 JULY 2018

ELECTRICIAN THEORY

SEMESTER-1

JULY 2018

When a capacitor is charged through a DC supply

source for infinite time, the final current through it is -

(a) Determined by the resistor

(b) Half of the initial current

(d) Zero

Answer : (d) Zero

The Electronic grade solder has a Tin: Lead ratio of....
(a) 40:60

(b) 60:40

(d) 70:30

Answer : (b) 60:40

Generally battery containers are made with -

(a) Hard Rubber

(b) Hard Plastic

(d) None of these

Answer : (c) Polypropylene

The sheath is used in cables to.................

(a) Provide strength to the cable

(b) Provide proper insulation

(d) Avoid chances of corrosion on strands

Answer : (a) Provide strength to the cable

Load of an electrical network determines -

(a) Resistance

(b) Impedance

(d) Voltage

Answer : (c) Current

The capacitors are used across AC supply for.................

(a) Power improvement

(b) Power factor improvement

(d) Voltage improvement

Answer : (b) Power factor improvement

Which of the following bulbs will have the least resistance?
(a) 230 V, 60 W

(b) 230 V, 100VV

(d) 115V, 100W

Answer : (d) 115V, 100W

The phenomenon of induced magnetism lagging

behind the magnetizing force is known as ……

(a) Eddy currents

(b) Hysteresis

(d) Permeability

Answer : (b) Hysteresis

The..............are tools used for bending, seaming and

forming of sheet metal that cannot be done on any

regular machine

(a) Snips

(b) Vices

(d) Centre Punch

Answer : (c) Stakes

In full wave rectifiers the current rating of each

diode is ...... to /of the DC output current.

(a) Equal

(b) Half

(d) Three times

Answer : (b) Half

The type of switch used in Staircase wiring is............

(a) Rotary Switch

(b) Push Button

(d) One Way Switch

Answer : (c) Two Way Switch

When the core becomes magnetically saturated,

the increase in magnetic field strength H

(a) Enhances B drastically

(b) Decreases the permeability of the core

(d) Almost has no effect on magnetic induction B.

Answer : (d) Almost has no effect on magnetic induction B.

The nominal voltage of Lead-acid cell in an open

circuit is approximately…….
(a) 2 Volts

(b) 1.5 Volts

(d) 2.5 Volts

Answer : (a) 2 Volts

While selecting a fixed value resistor, its main

specifications to be considered are....

(a) Voltage, wattage and tolerance in percents.

(b) Voltage, Current and Size

(d) Value in Ohms, Wattage and tolerance of its value

Answer : (d) Value in Ohms, Wattage and

tolerance of its value

The specific gravity of a Lead-acid battery's

electrolyte is measured by
(a) Hydrometer

(b) Barometer

(d) Pyrometer

Answer : (a) Hydrometer

Power factor of a pure resistive circuit is.................

(a) Zero

(b) Lagging

(d) Unity

Answer : (d) Unity

The function of the choke coil in fluorescent

lamp circuit is.......

(a) Only to limit the operating current

(b) Only to produce starting voltage impulse

limit the operating current *

(d) To limit the heating cuitent of filaments

Answer : (c) To produce starting voltage impulse

and to limit the operating current

AC mains supply in India has the frequency of..........

(a) 100 Hz

(b) 60Hz

(d) 40Hz

Answer : (c) 50 Hz

The fixed value Carbon Resistors are generally

not more than......Watts.

(a) 10

(b) 6

(d) 2

Answer : (d) 2

In an Inductive AC circuit, current.,
(a) Lags behind the voltage by 180°
(b) Leads the Voltage by 90u
(c) Lags behind the Voltage by 90°

(d) Is in phase with the Voltage

Answer : (c) Lags behind the Voltage by 90°

In a simple circuit consisting of a resistor of value R,

when voltage V is kept constant, then
the current.,................

(a) I is a directly proportional to R

(b) I=R

(d) I is constant irrespective of changes in R

Answer : (c) I is inversely proportional to R

The MCB's working is based on.........................

(a) Thermal operation

(b) Thermal and Magnetic operations

(d) Simple Mechanical Switching operation

Answer : (b) Thermal and Magnetic operations

The tripping time of ELCBs is usually less than.........

(a) 30 ms

(b) 80ms
(c) 100 ms

(d) 200 ms

Answer : (a) 30 ms

Which of the following materials is a good Insulator?
(a) Aluminium

(b) Copper

(d) Silver

Answer: (c) Porcelain

Which of the following materials is a good conductor?
(a) Mica

(b) Copper

(d) Ebonite

Answer: (b) Copper

The electrolyte used in Aluminum anodizing is dilute...........

(a) Nitric acid

(b) Aluminum sulphate solution

(d) Sulphuric acid

Answer: (d) Sulphuric acid

The positively charged ions are called.................

(a) Cations

(b) Atoms

(d) Neutrons

Answer: (a) Cations

The..........of a substance is the amount deposited

on the Electrode on passing a steady electric current

of one ampere for One second through its solution.

(a) Equivalent weight

(b) Atomic weight

(d) Chemical equivalent

Answer: (c) Electro chemical equivalent

The............. circuit is usually operated by

adjusting the variable resistor until no current

flows in the ammeter.

(a) Resistors in parallel

(b) Resistors in series

(d) Feedback

Answer: c) Wheatstone bridge

Certain materials normally behave as insulators

but allow for more valence electrons to be

made available by thermal energy.

These elements are known as.........

(a) Semiconductors

(b) Conductors

(d) Conduction band

Answer: (a) Semiconductors

The...................has a hammer face which is

used to drive in nails and the other end is

used for pulling out nails from the wood.

(a) Mallet

(b) Claw Hammer

(d)Axe

Answer: (b) Claw Hammer

An electrical component with resistance and

inductance elements with draw ……
(a) Leading pf Current

(b) Lagging pf Current

(d) Zero pf Current -

Answer: (b) Lagging pf Current

The graph between on alternating quantity

and time is called
(a) Bar graph

(b) Pie chart

(d) Waveform

Answer: (d) Waveform

The Capacitive Reactance.........

(a) Decreases as frequency increases
(c) Increases as frequency increases

(b) Applies only to series RLC circuits
(d) Increases with the time constant

Answer: (a) Decreases as frequency increases

Pure silicon crystal atoms contain............valance

electrons as a result of covalent bonding.

(a) 2

(b) 4

(d) 16

Answer: (c) 8

In case of electrical short circuit of a sub-circuit in domestic connection -

(a) Throw water to extinguish the fire

(b) Switch of the power supply first

(d) Do not act

Answer: (b) Switch of the power supply first

To work on line wire the electrician should use ….

(a) Goggles

(b) Gloves

(d) Watch

Answer: (b) Gloves

To rescue a victim from electrical shock, one should use -
(a) Iron rod

(b) Copper rod

(d) Aluminum rod

Answer: (c) Wooden rod

An isometric drawing present …..
(a) Top view
(b) Front view

(d) 3D - view

Answer: (d) 3D - view

The...................is the maximum amount of

reverse voltage which can be applied on a

diode before a breakdown point is reached.

(a) Breakdown Voltage

(b) Zener Voltage .

(d) Threshold Voltage

Answer: (c) Peak Inverse Voltage

The magnitude of the induced EMF in a coil is

directly proportional to the change of flux
linkages. This law is known as...............

(a) Joule's law

(b) Faraday's second law of electromagnetic induction

(d) Faraday's first law of electromagnetic induction

Answer: (b) Faraday's second law of electromagnetic induction

The...... .states that the polarity of the induced

voltage will oppose the change in magnetic

flux causing the induction.

(a) Joule's law

(b) Faraday's law

(d) Lenz's law

Answer: (d) Lenz's law

The........,.........materials have permeability

slightly less than'that of free space.

(a) Paramagnetic

(b) Diamagnetic

(d) Non-magnetic

Answer: (b) Diamagnetic

The............is the property of a magnetic material

which opposes the creation of magnetic flux in it. .

(a) Resistance

(b) Reluctance

(d) Conductance

Answer: (b) Reluctance

The flux density is measured in..................

(a)Tesia

(b) Weber

(d) Maxwell

Answer: (a)Tesia

The no load p.f. of a transformer is around …..

(a) Unity

(b) 0.2 lagging

(d) Zero

Answer: (b) 0.2 lagging

ELECTRICIAN (THEORY) SEMESTER-III JULY 2018

ELECTRICIAN

(THEORY)

SEMESTER-III

JULY 2018

Which of the following is not a part of the
Alternator's specification plate ?
(a) Voltage
(b) Phase
(c)KVA
(d) Type of winding
Answer: (d) Type of winding

A single phase Hysteresis motor can run at.......
(a) Synchronous speed only
(b) Sub synchronous speed only
(c) Synchronous and super synchronous speed
(d) Synchronous and sub synchronous speed
Answer: (a) Synchronous speed only

The direction of rotation of Hysteresis motor
is reversed by............
(a) Reversing supply leads
(b) Shift shaded pole with respect to main pole
(c) Both (a) & (b)
(d) None of these
Answer: (b) Shift shaded pole with respect to main pole

The motor used in domestic mixer grinder is................
(a) DC motor
(b) Induction motor
(c) Universal motor
(d) Synchronous motor
Answer: (c) Universal motor

A Stepper motor is a.....
(a) DC motor
(b) Two phase motor
(c) Single phase motor
(d) Multi phase motor
Answer:

The slip ring induction motors have..............rotor.
(a) Phase wound
(b) Squirrel cage
(c) Squirrel cage with winding
(d) Diamond coil wound
Answer: (a) Phase wound

The difference between the speed of a rotating
magnetic field and the associated rotor is called .............
(a) Split
(b) Salient pole
(c) Slip
(d) Pul1 out tor(lue •
Answer: (c) Slip

If the voltage is reduced to half, the torque
developed by an induction motor will be
reduced to..................
(a) 1/4 of original torque
(b) 1/2 of original torque
(c) 1/8 of original torque
(d) 2/3 of original torque
Answer:
In a three phase induction motor, the cage bars
of the rotor are arranged in an offset
pattern to the axis of rotation in order to prevent ...............
(a) Torque fluctuation
(b) Over heating
(c) Speed variation
(d) Voltage drop on load
Answer: (a) Torque fluctuation

The variation of power factor with respect to the field
current is called ...............
(a) V curve
(b) Inverted curve
(c) Hysteresis curve
(d) Circle diagram
Answer: (b) Inverted curve

When asynchronous motor is running at
synchronous speed, the damper winding
produces.................
(a) Damping torque
(b) Eddy current torque
(c) Torque aiding the developed torque
(d) No torque
Answer: (d) No torque

A motor which can conveniently be operated
at lagging as well as leading power factor is
the...................
(a) Squirrel cage induction motor
(b) Wound rotor induction motor
(c) Synchronous motor
(d) DC shunt motor
Answer: (c) Synchronous motor

A synchronous motor is operating on no load
at unity power factor. If the field current is
increased, power factor will become............
(a) Leading and current will decrease
(b) Leading and current will increase
(c) Lagging and current will decrease
(d) Lagging and current will increase
Answer: (a) Leading and current will decrease

The frequency of ripple in the output voltage of a
three phase Half controlled bridge rectifier
depends on the................
(a) Firing angle
(b) Load inductance
(c) Load resistance
(d) Supply frequency
Answer: (d) Supply frequency

A PWM switching scheme is used in a three phase inverter to........
(a) Reduce total harmonic distortion with modest filtering
(b) Reduce low order harmonics and increase high order harmonics
(c) Minimize the load on DC side
(d) Increase the life of the batteries
Answer: (b) Reduce low order harmonics and increase
high order harmonics

Which of the following is a Shell type of transformer lamination?
(a) T & I type
(b) E & T type
(c) U & I type
(d) T & U type
Answer: (d) T & U type

For a given number of poles(2) and armature conductors,
a hp winding will carry.............a wave winding.
(a) More current than
(b) Same current as
(c) Less current than
(d) Half the current than
Answer: (a) More current than

An Eight pole duplex lap winding will have ......... parallel paths.
(a) 8
(b) 12
(c) 32
(d) 16
Answer: (d) 16

In a simplex wave winding the number of
parallel paths is equal to
(a) Number of poles in the machine
(b) Two
(c) Number of pair poles
(d) One
Answer: (b) Two

The number of parallel paths in simplex lap
winding is equal to...
(a) Two
(b) Number of poles
(c) Number of pair poles
(d) One
Answer: (c) Number of pair poles

In a lap winding, the number of brushes required
is equal to............
(a) Number of coils
(b) Number of pairs of poles
(c) Number of poles
(d) Commutator pitch
Answer: (c) Number of poles

In a wave winding, the commutator pitch is
approximately equal to..................
(a) Twice the pole pitch
(b) Thrice the pole pitch
(c) Half the pole pitch
(d) Pole pitch
Answer: (a) Twice the pole pitch

The AC armature winding of an alternator
operates at........the field winding.
(a) The same voltage as
(b) Much higher voltage than
(c) Much less voltage than
(d) Half the voltage than
Answer: (b) Much higher voltage than

The stator of an alternator is wound for..........on the stator.
(a) A more number of poles than
(b) Less number of poles than
(c) The same number of poles as
(d) Twice the number of poles
Answer: (c) The same number of poles as

The Damper windings are used in the alternators to ……
(a) Reduce eddy current loss
(b) Achieve synchronism
(c) Reduce winding losses
(d) Prevent hunting
Answer: (d) Prevent hunting

The AC armature winding of an alternator is.................
(a) Always star connected .
(b) Star delta connected
(c) Generally delta connected
(d) Pi connected
Answer: (a) Always star connected
While testing a Fluorescent tube starter with series
testing board, the starter is considered good if the lamp................
(a) Glows continuously
(b) Does not glow at all
(c) Continuously flickers
(d) Glows initially then turns off permanently
Answer: (c) Continuously flickers

The illurnination power of a lighting source is measured in.
(a) Lumen
(b) Candela
(c) Foot candle
(d) Candle power
Answer: (d) Candle power

As per IE rules, the lighting load in a sub-circuit
of the house wiring should not be than.........watts.
(a) 1500W
(b) 1200W
(c) 1000W
(d) 800W
Answer: (d) 800W

As per IE rules, the load in a power sub-circuit in
house wiring is normally restricted to........watt
and number of outlets to.........
(a) 5000, two
(b) 3000, two
(c) 4000, three
(d) 4500, four
Answer: (b) 3000, two

In a Fluorescent tube fixture, if the tube does
not strike a glow but both filaments glow
red, the possible defect is............
(a) Opened choke coil
(b) Short circuited choke coil
(c) Starter contacts permanently opened
(d) Starter contacts permanently shorted
Answer: (d) Starter contacts permanently shorted

The electrical wiring in factories and industries
is done by.........,.
(a) Cleats
(b) Casing capping
(c) Surface metal conduit
(d) Surface PVC conduit
Answer: (c) Surface metal conduit

The magnetic operating limit of C-type of
MCB’s is..........times of the rated current.
(a) 5 to 10
(b) 20 to 30
(c) 3 to 5
(d) 10 to 20
Answer: (a) 5 to 10

Which one of the following lamps has the
longest operating life?
(a) LED lamp
(b) Fluorescent tube light
(c) CFL
(d) Incandescent lamp
Answer: (a) LED lamp
When the Growler is connected with 230 V,
AC supply and armature is placed over it,
the arrangement behaves like a....................
(a) Potential Divider
(b) AC Motor
(c) Transformer .
(d) DC Bridge
Answer: (c) Transformer
A motor normally fitted to a domestic
vacuum cleaner is.............motor.
(a) Universal
(b) Cage Induction
(c) Wound rotor
(d) Shunt Wound
Answer: (a) Universal

The type of single-phase induction motor
having the highest power factor at full load
is....:..............
(a) Shaded pole type
(b) Split-phase type
(c) Capacitor-start type
(d) Capacitor-run type
Answer: (d) Capacitor-run type

The method of braking an induction motor by
interchanging the supply to two of the
stator phase windings is called..................
(a) Plugging
(b) Stopping
(c) Commutation
(d) Retarding
Answer: (a) Plugging

If a three phase induction motor is switched on with
one phase disconnected, the motor will ................
(a) Run at low speed
(b) Burn Out
(c) Run at High Speed
(d) Not Run
Answer: (b) Burn Out

The running of induction motors at slow and
steady speed much less than the actual
speed is known as.
(a) Crawling
(b) Damping,
(c) Sinking
(d) Ageing
Answer: (a) Crawling
The distribution of load between two alternators
operating in parallel can be changed by
changing...............
(a) Phase sequence .
(b) Field excitation of alternators
(c) Current direction
(d) Driving torques of prime movers
Answer: (d) Driving torques of prime movers

A 3-phase synchronous motor connected to
AC mains is running at full load and unity
power factor. If its shaft load is reduced by half,
with field current held constant, its new
power factor will be.........
(a) Unity
(b) Leading
(c) Lagging
(d) Dependent upon motor parameters
Answer: (b) Leading

The starting torque of slip-ring induction motor
can be increased by inserting a suitable ……..
in series with the rotor circuit of the motor,
(a) Capacitor
(b) Resistance
(c) Inductor
(d) Overload relay
Answer: (b) Resistance

The Growler instrument is made in ...............
type of iron core.
(a) E & I
(b) Shell
(c) T&U
(d) H
Answer: (d) H

The voltage regulation of an alternator with power
factor of 0.8 lagging is ……. at unity power factor.
(a) Greater than
(b) The same as
(c) Smaller than
(d) 100%
Answer: (a) Greater than

A ceiling fan uses.......
(a) Capacitor start motor
(b) Universal motor
(c) Capacitor start and capacitor run motor
(d) Split-phase motor
Answer: (a) Capacitor start motor

The voltage regulation of an alternator is larger
than that of a DC generator because of ..................
(a) Large armature resistance
(b) Large leakage reactance
(c) Complex effects of armature reaction
(d) Small armature resistance
Answer: (c) Complex effects of armature reaction

[f the excitation an alternator operating in
parallel with other alternators, is increased
above the normal value of excitation, its .........
(a) Output current decreases
(b) Power factor becomes more lagging
(c) Power factor becomes more leading
(d) Output KW decreases
Answer: (b) Power factor becomes more lagging

ELECTRICIAN (THEORY) SEMESTER - II JULY 2018 NSQF

ELECTRICIAN

(THEORY)

SEMESTER - II

JULY 2018 NSQF

How the capacity of battery is specified?
a)Volt
b) Watt
c) Volt Ampere
d) Ampere hour
Answer : d) Ampere hour

What is the name of defect that bending of plates in secondary cells?
a) Partial short
b) Local action
c) Buckling
d) Hard sulphation
Answer : c) Buckling

Which type of transformer is used for high frequency application?
a) Ring core transformer
b) Ferrite core transformer
c) Silicon steel core transformer
d) Grain oriented core transformer
Answer : b) Ferrite core transformer

What is the function of conservator in transformer?
a) Allows expansion of oil level due to load variation
b) Transfers the heat to atmosphere
c) Allows to release internal pressure
d) Prevents the moisture entry
Answer : a) Allows expansion of oil level due to load variation

Which loss of transformer is determined by short circuit test?
a) Eddy current loss
b) Windage loss
c) Hysteresis loss
d) Copper loss
Answer : d) Copper loss

Calculate the voltage regulation in percentage of the
transformer if the no load voltage is 240 volt and full load
voltage is 220 volt?
a) 7.2%
b) 9.09%
c) 8.71%
d) 8.3%
Answer :

What is the purpose of using laminated core in transformer?
a) Reduce eddy current loss
b) Reduce hysteresis loss
c) Reduce mechanical loss
d) Reduce copper loss
Answer : a) Reduce eddy current loss

What is the S.I unit of luminous intensity?
a) Lux
b) Lumen
c) Candela
d) Steradian
Answer : c) Candela

Which force is required to move the pointer
from zero position in an indicating instrument?
a) Deflecting force
b) Controlling force
c) Air friction damping
d) Eddy current damping
Answer : a) Deflecting force

Which is the position to use the instrument
provided with gravity control?
a) Any position
b) Vertical position
c) Inclined position
d) Horizontal position
Answer : b) Vertical position

Which error is caused by the incorrect position of
instrument reading?
a) Device error
b) Human error
c) Influence error
d) Switching error
Answer : a) Device error

Which instrument is used to measure one
ohm and below one ohm resistance value
accurately?
a) Megohm meter
b) Shunt type ohm meter
c) Multimeter (analog)
d) Series type ohm meter
Answer : b) Shunt type ohm meter

What is the purpose of the 3 terminal provided in a advanced megohm meter?
a) Get higher ohmic values
b) Get accurate readings without oscillation
c) Pass the excess current to ground
d) Pass the excess voltage to ground
Answer : b) Get accurate readings without oscillation

Which material is used to make heating element?
a) Silver
b) Copper
c) Nichrome
d) Aluminium
Answer : c) Nichrome

Which material is coated in tungsten electrode
of a fluorescent tube lamp?
a) Barium and stroatium oxide
b) Phosphor powder
c) Fluorescent powder
d) Silver oxide
Answer : a) Barium and stroatium oxide

Which position MB type high pressure mercury
vapour lamps are operated?
a) Any position
b) Inclined
c) Horizontal
d) Vertical
Answer : a) Any position

What is the function of leak transformer in
high pressure sodium vapour lamp circuit?
a) Ignite the high voltage initially
b) Reduce the working voltage
c) Increase the working voltage
d) Reduce the starting current
Answer : a) Ignite the high voltage initially

How stroboscope effect in industrial twin tube light
fitting is reduced?
a) Connecting capacitor parallel to supply
b) Connecting capacitor in series with one tube light
c) Connecting capacitor in series with supply
d) Connecting two capacitors in series to each tube light
Answer :

What is the function of stirrer motor in micro wave oven?
a) Draws cooling air inside
b) Revolves and reflects the electromagnetic energy
c) Exhausts the hot air outside
d) Spreads the heat uniformly
Answer : b) Revolves and reflects the electromagnetic energy

Which type of A.C single phase motor is used in food mixer?
a) Universal motor
b) Repulsion motor
c) Spl it phase motor
d) Shaded pole motor
Answer : a) Universal motor

What is the minimum size of Aluminum earth
continuity conductor used in single phase domestic
wiring as per BIS?
a) 3Sq.mm
b) 3.5Sq.mm
c) 2.5Sq.mm
d) 1.5Sq.mm
Answer : c) 2.5Sq.mm

How the conduit pipes are specified?
a) Length in metre
b) Outer diameter in mm
c) Inner diameter in mm
d) Wall thickness in mm
Answer : b) Outer diameter in mm

What is the fusing factor for rewireable fuse?
a) 1.1
b) 2.1
c) l.4
d) 2.5
Answer : c) l.4

What is the purpose of underwriter's knot for
pendent holder connection?
a) Reduce the strain from the terminals of accessories
b) Increase mechanical strength
c) Prevent excessive cap cover pressure
d) Avoid loose connections
Answer : a) Reduce the strain from the terminals
of accessories

Which device converts sunlight into electrical energy?
a) Light emitting diode
b) Liquid crystal diode
c) Photo voltaic cell
d) Light dependent resistor
Answer : c) Photo voltaic cell

Which type of load is protected by the L-series MCB?
a) Motors
b) Hand tools
c) Geyser
d) Air conditioner
Answer : c) Geyser

What is the effect of low current rated cable used
to connect higher current load?
a) Cable damage due to heat
b) Load current increases
c) Voltage drop decreases
d) Voltage drop increases
Answer : a) Cable damage due to heat

How many two way switches with intermediate
switch are used to control one lamp from
three different places?
a) 1
b) 4
c) 3
d) 2
Answer :

Which method is used to reduce earth resistance
value in a existing earth?
a) Increasing the length of electrode
b) Adding more sand and charcoal in earth pits
c) Keeping wet condition in earth pits always
d) Increasing the diameter of earth electrode
Answer : c) Keeping wet condition in earth pits always

Why A.C is required to measure the earth resistance
by using earth resistance tester?
a) Regulate the current
b) Avoid electrolytic emf interference
c) Decrease the voltage drop
d) Increase the voltage drop
Answer : b) Avoid electrolytic emf interference

What is the advantage of concealed wiring?
a) Easy to maintain
b) Less voltage drop
c) High insulation resistance
d) Protection against moisture
Answer : d) Protection against moisture

What is the maximum permissible load for
a power sub circuit as per I.E rules?
a) 800 Watt
b) 3000 Watt
c) 2000 Watt
d) 1500 Watt
Answer : b) 3000 Watt

Which location the service connection supply
leads to be connected at consumer main
boaid?
a) IC cut out
b) Main switch
c) Energy meter
d) Distribution board
Answer : c) Energy meter

Which law secondary cell works?
a) Faradays laws of electromagnetic induction
b) Joule's law
c) Faradays laws of electrolysis
d) Lenz's law
Answer :

Tuesday, 23 April 2019

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Wednesday, 2 January 2019

FITTER THEORY SEMESTER-IV 2016

FITTER THEORY SEMESTER-IV 2016
1.The following is machined dry.
a) Aluminium
b) Cast iron
c) Titanium
d) All of these
Answer:- b) Cast iron

2.The following device is used to
determine the mix ratio of water-
soluble coolanls:
a) Diffract meter
b) Hydrometer
c) Refract meter
d) None of these
Answer:- c) Refract meter

3.The use of metal working fluids_.
a) Increase the tool life
b) Produce better surface finish
c) Prevent rise in temperature
d) All of these
Answer:- d) All of these

4.The main constituent(s) of
mineral oil is/are_.
a) Paraffin
b) Naphthenic
c) Aromatics
d) All of these
Answer:- d) All of these

5.The following is used in heat
treatment process as a quenching
medium for obtaining
a higher degree of hardness.
a) Mineral oil
b) Fatty acid
c) Waxes
d)Graphite suspensions
Answer:- b) Fatty acid

6.Which of the following is added
to the cutting fluids so that soapy
film is produced between the work piece
& tool and chip & tool face?
a) Sulphur
b) Chlorine
c) Both (a) & (b)
d) None of these
Answer:- c) Both (a) & (b)

7.Soluble oil is used as cutting
fluid in .............
a) Sawing
b) Drilling and boring
c) Reaming
d) All of these
Answer:- d) All of these

8.Usually no cutting oil is used in ....
a) Broaching
b) Planning and shaping
c) Thread rolling
d) Honing
Answer:- b) Planning and shaping

9.Choose name of the bolt.
a) Gib Headed foundation boit
b) Cotter foundation bolt
c) Through foundation bolt
d) Eye foundation bolt
Answer:- d) Eye foundation bolt

10. ............... are used to separate
the tramp oil (sump oil) from coolant.
a) Magnetic separators
b) Skimmers
c) Rotating spindles
d) All of these
Answer:- b) Skimmers

11 Which of the following parameters
influence the axial feed rate in
centreless grinding?
a) Regulating wheel diameter
b) Angle between the axes of grinding
and regulating wheels
c) Speed of the regulating wheel
d) All of these
Answer:- d) All of these

12. Hydraulic oil is compressible
a) Not at all
b) Very much
c) Very Little
d) None of these
Answer:- c) Very Little

13. Power = Torque x .................
a) Velocity
b) RPM
c) Force
d) Area
Answer:- b) RPM

14. .... is prime mover in hydraulic system.
a) Oil
b) Electric Motor
c) Pipe
d) Impeller
Answer:- b) Electric Motor

15. Power of Pump = .............. x
Volume flow rate.
a) Velocity
b) RPM
c) Force
d) Pressure
Answer:- d) Pressure

16. 1 HP = ................ W
a) 746
b) 1000
c) 100
d) 764
Answer:- a) 746

17. Which flat belt drive system has
two pulleys mounted on driven shaft
and one pulley on driving shaft?
a) Multiple belt drive
b) Cone pulley drive
c) Fast and loose pulley drive
d) None of these
Answer:- ) Fast and loose pulley drive

18. Which of the following statements
are false for belt drives?
i) Belt drive is used in applications
having constant speed dnve
ii) Belt drives can be used at extremely
high speeds
iii) Belt drives have low power
transmitting capacity
iv) Belt drives need continuous lubrication
a) (i) & (ii)
b) (i), (ii) & (iii)
c) (ii), (iii)&(iv)
d) (i), (ii) & (iv)
Answer:- d) (i), (ii) & (iv)

19. Determine power rating of an electric
motor if it runs at 1440 r.p.m and line shaft
transmits torque of 75 Nm. Assume
Reduction ratio = 1.6 .................
a) 10.36 kW
b) 11.3kW
c) 7.068 kW
d) 9.12kW
Answer:- c) 7.068 kW

20. In simple gear trains the direction of
rotation of driven gear is opposite to the
direction of rotation of driving gear
only if ...................
a) Even number of idler gears are present
b) Odd number of idler gears are present
c) Any number of idler gears are present
d) None of these
Answer:- a) Even number of idler gears are
present

21.Why is an idler gear used in gear trains?
a) To obtain minimum center distance
between driving and driven snatt
b) To have required direction of rotation
c) Both (a) & (b)
d. None of these
Answer:- b) To have required direction
of rotation

22. Determine torque transmitted on
the pinion shaft if torque transmitted
on gear shaft is 20 nm consider Gear ratio = 4
a)8nm
b) 5 nm
c) 80 nm
d)16nm
Answer:- b) 5 nm

23. Which of the following statements
is/are true for gear drives?
a) They can be used for long center distances
b) They are used to transmit power between
non-intersecting and parallel shafts
c) They cannot be used for high reduction ratios
d) All of these
Answer:- b) They are used to transmit power
between non-intersecting and parallel shaft

24. Which gears are used to connect two
intersecting shaft axes?
a) Crossed helical gear
b) Worm and worm wheel
c) Bevel gears
d) All of these
Answer:- c) Bevel gears

25. What is meant by gear ratio?
a) The ratio of pinion speed and gear speed
b) The ratio of number of teeth on pinion
and number of teeth on gear
c) Both (a) & (b)
d) None of these
Answer:- a) The ratio of pinion speed and
gear speed

26. What is the function of hydraulic
motor?
1. Hydraulic motor converts hydraulic
oil under pressure into torque and angular
displacement
2. Hydraulic motor converts hydraulic
oil under pressure into force and linear
displacement
3. Hydraulic motor converts hydraulic energy
into mechanical energy

4. Hydraulic motor converts mechanical energy
into hydraulic energy
a) 1 and 4 b) 1 and 3 c) 2 and 3 d) 2 and 4
Answer:- b) 1 and 3

27. Calculate area of a pipe if, flow rate is
20 I/min and flow velocity is 5 cm/s
a) 66.66 cm²
b) 60 cm²
c) 62 cm²
d) None of these
Answer:- a) 66.66 cm²

28. What this hydraulic symbol
a) Motor unidirectional
b) Motor bidirectional
c) Pump unidirectional
d) Pump bidirectional
Answer:- a) Motor unidirectional

29. In soldering the melting point of filler
metal is ...................
a) Below 420°C
b) Above 420°C
c) Below 520°C
d) Above 520°C
Answer:- b) Above 420°C

30. The composition of electrician
solder is ...........
a) Lead-37%, tin-63%
b) Lead-50%, tin-50%
c) Lead-63%, tin-37%
d) Lead-70%, tin-30%
Answer:- d) Lead-70%, tin-30%

31. The composition of soft solder is____
a) Lead-37%, tin-63%
b) Lead-50%, tin-50%
c) Lead-63%, tin-37%
d) Lead-70%, tin-30%
Answer:- a) Lead-37%, tin-63%

32. Corrosion can be prevented by_
a) Alloying
b) Tinning
c) Galvanizing
d) All of these
Answer:- d) All of these

33. As compare to iron, aluminum has ....
a) Higher tendency to oxidize
b) Less tendency to oxidize
c) Equal tendency to oxidize
d) None of these
Answer:- a) Higher tendency to oxidize

34. Conditions for good electroplating
is/are .......
a) High current density
b) Low temperature
c) High concentration of metal in electrolyte
d) All of these
Answer:- d) All of these

35. Iron is galvanized by coating with ...............
a) Zinc
b)Tin
c) Copper
d) Nickel
Answer:- a) Zinc

36. Which defect arises due to faulty
heat treatment?
a) Over heating and burring
b) Oxidation and decarburization
c) Cracks, distortion and warping
d) All of these
Answer:- d) All of these

37. In general, hardening is followed by ....
a) Annealing
b) Normalizing
c) Tempering
d) Case hardening
Answer:- a) Annealing

38. This type of fastener is designed to
prevent movement between shafts and wheels.
a) Keys
b) Machine pins
c) Rivets
d) Knuckle
Answer:- a) Keys

39. A mechanical device that stores
energy, when deflected and to return the
equivalent amount of energy when released
is known as a ..................
a) Blind rivet
b) Key way
c) Spring
d) Hammer
Answer:- c) Spring

40. Joint strength in brazing operation is-.
a) As high as in gas or arc welding
b) Not as high as in gas or arc welding
c) Higher than that of in gas or arc welding
d) Unpredictable
Answer:- b) Not as high as in gas or arc
welding

41. Which of the following is a soft solder?
a) Copper-zinc alloy
b) Nickel-silver alloy
c) Lead-tin alloy
d) All of these
Answer:- c) Lead-tin alloy

42. Transmission angle is the angle between
a) Input link and coupler
b) Input link and fixed li
c) Output link and coupler
d) Output link and fixed
Answer:- c) Output link and coupler

43. What this hydraulic symbol means
a) Directional control valve
(4 ports 12 positions)
b) Directional control valve
(4 ports /3 positions)
c) Directional control valve
(5 ports /2 positions)
d) None of these
Answer:- a) Directional control valve
(4 ports 12 positions)

44. Module of a gear is ..............
a) DAT b) T/D c) 2D/T d) 2T/D
Answer:- b) T/D

45. When screw threads are to be used
in a situation where power is being
transmitted in one direction only, then
the screw threads suitable for this will be ....
a) Square threads
b) Knuckle threads
c) Acme threads
d) Buttress threads
Answer:- d) Buttress threads

46. Which of the following material has
the maximum ductility?
a) Mild steel
b) Copper
c) Aluminium
d) Zinc
Answer:- a) Mild steel

47. The sleeve or muff coupling is
designed as a-.
a) Dun cylinder
b) Solid shaft
c) Thick cylinder
d) Hollow shaft
Answer:- d) Hollow shaft

48. In a flange coupling, the flanges are
coupled together by means of_.
a) Studs
b) Bolts and nuts
c) Headless taper bolt
d) None of these
Answer:- b) Bolts and nuts

49. An open belt drive is used when ......
a) Driven shaft is to be started or stopped
whenever desired without interfering
with the driving shaft
b) Shafts are arranged parallel and rotate
in the same directions
c) Shafts are arranged at right angles and
rotate in one definite direction
d) Shafts are arranged parallel and rotate
in the opposite directions
Answer:- b) Shafts are arranged parallel
and rotate in the same directions

50. When bevel gears connect two shafts
whose axes intersect at an angle greater
than a right angle and one of the bevel gears
has a pitch angle of 90°, then they are
known as
a) Internal bevel gears
b) Angular bevel gears
c) Crown bevel gears
d) Mitre gears
Answer:- c) Crown bevel gears

Sunday, 30 December 2018

FEB 2016 PLUMBER THEORY SEMESTER -1

FEB 2016

PLUMBER

THEORY

SEMESTER -1

1. Which tool is used as
linear measurement?
A Outside caliper
B Inside caliper
C Steel rule
D Scriber
Answer:- C Steel rule
2. Wave set is a term of
A drill set
B pipe set
C die set
D hacksaw set
Answer:- D hacksaw set

3. Vices are used for.......
A hanging the work piece
B holding work piece
C cutting the work piece
D filing the work piece
Answer:- B holding work piece
4. Which one of the following
is a striking tool?
A Hammer
B Reamer
C Jumper
D Drill bit
Answer:- A Hammer
5. Scriber is used for....
A measuring
B marking
C tapping
D drilling
Answer:- B marking
6. Shank is the male part of …..
A cutting point .
B tang
C drill
D flute
Answer:- C drill
7. Bib - cock spindle washer is
made out of …
A stainless steel
B rubber
C nylon
D plastic
Answer:- C nylon
8. Tap is used for.,….
A. marking holes
B. making threads
C. making holes
D. marking threads
Answer:- B. making threads
9. Loading device is …..
A. nuts
B. guide
C. rivet
D. wedges
Answer:- A. nuts

10. Pipes are specified with …..
A. Size and grade
B. Shape
C. Size
D. Grade
Answer:- A. Size and grade

11. Which tool is used to
cut the pipes?
A Pipe cutter
B Tape wrench
C Chisel
D Die
Answer:- A Pipe cutter

12. Ferrous metal is an alloy of....
A iron and silicon
B carbon and silicon
C manganese and silicon
D iron and carbon
Answer:- D iron and carbon

13. Which tool is used to making groove along
the grains in the wood?
A Mortise chisel
B Plough plane
C Wooden jack plane
D Metal jack plane
Answer:- A Mortise chisel

14. Which tool is used for extracting nails?
A Ball peen hammer
B Claw hammer
C Sledge hammer
D Mallet
Answer:- B Claw hammer

15. C clamp is used for...
A. Sawing the job
B. Holding the job
C. Hooking the job
D. Striking the job
Answer:- C. Hooking the job

16. Sharpening angle of chisel is....
A 30° to 35°
B 40° to 45°
C 50° to 55°
D 20° to 25°
Answer:- A 30° to 35°

17. Which tool is used to
make fine cut in wooden work piece?
A Hand Saw
B Wooden Saw
C Tenon Saw
D Rip Saw
Answer:- C Tenon Saw

18. Which welding process is
preferred to weld thick metal plate?
A Tig welding
B Thermit welding
C Submerged arc welding
D Oxy - acetylene gas welding
Answer:- C Submerged arc welding

19. The run deposited on the
backside, before welding the
joint is called....
A. root run
B. sealing run
C. backing run
D. bakina run
Answer:- C. backing run

20. Size of an electrode holder
is specified by its....
A. weight
B. shape
C. metal used for making
D. current carrying capacity
Answer:- D. current carrying capacity

21. Which type of flux coating on the electrode is
most suitable for over head welding?
A Tin welding
B Copper coating
C Mild steel coating
D Cellulosic coating
Answer:- B Copper coating

22. Mortar is used for.,
A. binding the cement
B. binding the pan
C. binding the sand
D. binding the stone
Answer:- D. binding the stone

23. Angle of 'A' shaped plump square is…….
A. 60°
B. 90°
C. 180°
D. 360°
Answer:- C. 180°

24. Application of trowel is
A brick forming
B brick laying
C floor ramming
D floor leveling
Answer:- B brick laying

25. Cross cut saw is used for cutting …..
A hard stone
B hard wood
C soft stone
D soft wood
Answer:- A hard stone

26. Which tool is used to check the level?
A Plumb rule
B Plumb square
C Plumb bob
D Pix axe
Answer:- B Plumb square

27. Man hole has a standard depth which is less
Than ....
A 0.5 metre
B 1.0 meter
C 1.5 metre
D 2.0 metre
Answer:- C 1.5 metre

28. Base material of the cement is....
A carbonate
B lime
C stone
D sand
Answer:- B lime

29. Purpose of die sets is to make ....
A external threads
B internal threads
C round holes
D bends
Answer:- A external threads

30. Where lubrication oil is used to prevent
rusting in pipe wrench?
A On movable jaw
B On the fixed jaw
C On adjustment nut
D On handle
Answer:- A On movable jaw

31. What for Tee is used in pipe lines?
A To reduce dia
B To take diversion
C To connect tap
D To take branch
Answer:- D To take branch

32. No. of pipe lines in a single stack system is...
A one
B two
C three
D four
Answer:- A one

33. Rain water harvesting means about
A digging wells
B recharge wells
C constructing dams
D pumping water from deep wells
Answer:- B recharge wells

34. G.I Pipe is coated by
A. cast iron
B. chromium iron
C. galvanize iron
D. nickel
Answer:- C. galvanize iron

35. Functions of trap is.......
A to prevent entry of foul gases
B to prevent entry of harmful gases
C for entry of non harmful foul gases
D for entry of foul qases
Answer:- A to prevent entry of foul gases

36. Parts of tap
A. Spindle
B. Scoop
C. Stock
D. Peen
Answer:- A. Spindle

37. Zinc chloride is a
A fuel
B resin
C lubricator
D soft solder
Answer:- D soft solder

38. How many numbers of jaws contains
pipe wise?
A 2
B 3
C 4
D 5
Answer:- A 2

39. In which vice, screw is assembled vertical to
move the jaws up and down direction?
A. Bench vice
B. Pipe vice
C. Hook vice
D. Pin vice
Answer:- B. Pipe vice

40. The tool used to tighten/loosen the
Pipes is....
A pipe die
B pipe tap
C pipe tape
D pipe wrench
Answer:- D pipe wrench

41. Purpose of bituminous coating is....
A protection against weeping
B protection against corrosion
C protection against strength
D protection against crack
Answer:- B protection against corrosion

42. Spun pipes are made of
A plastic mould
B metal mould
C rubber mould
D wax mould
Answer:- B metal mould

43. In which pipes are used in water providing
plants?
A. G.I
B. C.I
C. SW
D. A.C
Answer:- B. C.I

44. Flexible joints are called as …..
A. bell socket
B. temporary.
C. Victaulic
D. Flanged joint
Answer:- A. bell socket

45. Traps are used to prevent the passage of
A. air
B. oxygen
C. sewer gas
D. Wash water
Answer:- C. sewer gas

46. When pipe vice handle is rotated in anti clock
wise....
A movable jaw raises
B movable jaw lowers
C fixed jaws moved
D dismantle the fixed jaw
Answer:- B movable jaw lowers

47. PVC pipes are not in usage of....
A cold water
B drain water
C hot water
D waste water
Answer:- C hot water

48. Shape of pipe vice jaw is....
A V shaped jaw
B Flat shaped jaw
C U shaped jaw
D S shaped jaw
Answer:- A V shaped jaw

49. Application of wrench is......
A. open
B. close
C. open and close
D. tighten and loosen the pipes
Answer:- D. tighten and loosen the pipes

50. Concentric reducer used as …..
A horizontal position
B vertical position
C inclined vertical position
D inclined position
Answer:- A horizontal position

Tuesday, 2 January 2018

Which among of following material can be cut with Rasp cut file...

Which among of following material can be cut with Rasp cut file...
A) Steel
B) Leather and wood
C) Brass and branze
D) Copper and tin

Monday, 1 January 2018

ITI QUESTIONS

Which one of the following governs the selection of feed when turning on work piece?
A) Type of coolant required
B) Surface finish required
C) Tool geometry
D) All of these

The sliding surface of lathe bed are......
A) Flame hardened
B) Case hardened
C) Normalized
D) Tempered

Which one is not part of centre lathe
A) Saddle
B) Feed rod
C) Arber
D) Lead screw

Which one is not part of centre lathe
A) Saddle
B) Feed rod
C) Arber
D) Lead screw

Advantages of four jaw chuck are...
A) Large diameter can be held by reversing the jaw
B) It has more gripping power
C) Irregular work piece can be held easily
D) All of these

While finding solution to AC CIRCUIT, Vector quantities are added or subtracted

One of the method for solving
Vector quantities is.....
A) Parallelogram method
B) Scalar method
C) Algebraic method
D) Numerical method

AC Winding-Electrical degrees

Total electrical degrees for a three phase winding depends on number of....
A) Slots
B) Phases
C) Coils
D) Poles

In the assemblies obtained by using the system of limits and fits, the dameged part....
A) Can not be replaced
B) May be easily replaced without rejecting the assembly
C) are to be scrapped
D) Have to be made with new tolerance

Interpretation of elements in dimensioning.
A size a component is given as 24_0.1mm. What does -0.1 indicat?
A) Lower deviation is 0mm
B) Lower deviation is 0.1mm
C) Upper deviation is +0.1mm
D) Fundamental deviation is 0mm

Which on of the bushes used in a drill jig and parmits cutting tool of different diameters
A) Removable bushes
B) press fit bushes
C) Liner bushes
D) Fixed removable bushes

Which among of following material can be cut with Rasp cut file...
A) Steel
B) Leather and wood
C) Brass and branze
D) Copper and tin

Which on of the bushes used in a drill jig and parmits cutting tool of different diameters
A) Removable bushes
B) press fit bushes
C) Liner bushes
D) Fixed removable bushes