Paper Code:- 35/2016
Date Of Test:-25.02.2016
(A) Moistened
(B) Dry
(C) Ionized
(D) None of the above
Answer:Ionized
2.The meter used to measure
the temperature of a furnace is :
(A) hydrometer
(B) pyrometer
(C) hygrometer
(D) tachometer
Answer:pyrometer
3.Which part is provided in a battery charger to prevent the flow of excessive current into the battery?
(A) Coarse selector
(B) Time selector switch
(C) Limiting resistance
(D) Transforme
(A) Will not function
(B) Will make humming noise
(C) More current will flow
(D) No output voltage
5.What are the two relative quantities to be plotted for external characteristics curve for DC shunt generator?
(A) Field current Vs No load
voltage (B) Armature current Vs Induced e.m.f
(C) Load current Vs Terminal
voltage (D) Load current Vs Induced e.m.f
6.What will happen to a self
excited DC generator, if the generator runs in reverse direction?
(A) The induced e.m.f. is
increased
(B) There is no change in
the induced e.m.f.
(C) Spark will be produced
in the commutator
(D) Residual magnetism in
the pole will be destroyed
7.Which is the application
of delayed response type diazed fuse?
(A) Motor circuits
(B) Heating circuits
(C) Lighting circuits
(D) Electronic circuits
8.The force between two long
parallel conductors is inversely proportional to :
(A) current in one conductor
(B) distance between the
conductors
(C) radius of conductors
(D) product of current in
two conductors
9.Which of the following
circuit elements will oppose the change in the circuit current?
(A) Inductance
(B) Resistance
(C) Capacitance
(D) All of the above
10. The colour of light of
mercury vapour lamp is :
(A) Greenish blue
(C) Pink
(B) Yellow
(D) White
11. Which of the following
frequencies has the longest time period?
(A) 1 Hz
(B) 1 kHz
(C) 10 Hz
(D) 10 kHz
12. In a generator maximum
value of e.m.f. is generated within the coil axis is at:
(A) 45° with field axis
(B) 90° with field axis
(C) 180° with field axis
(D) Zero degree with field
axis
13.A choke coil of operating
fluorescent lamp is short-circuited. What is the consequence?
(A) The lamp becomes
brighter
(B) The lamp becomes less
bright
(C) The current becomes so
large that it damages the tube
(D) The short circuit is
noticed only after the lamp is switched 'ON' again
14. A contactor coil is
designed for 220V DC. What happens if it is connected to 220 V AC?
(A) Too large a current is
drawn by the coil and it is destroyed
(B) Too small a current is
drawn by the coil and the operation of the contactor is no
longer certain
(C) It draws the same
current
(D) It works better
15. A capacitor is connected
across a 200 V AC line. Its minimum voltage rating should be:
(A) 100 volt
(B) 200 volt
(C) 300 volt
(D) 400 volt
16. The power factor of 3-phase load is less than 0.5. While measuring power by two watt meters:
(A) one of the wattmeter’s
gives zero reading
(B) one of the wattmeter’s
gives negative reading
(C) both wattmeter’s give
positive reading
(D) one of the wattmeter’s
kicks backward
17. Voltage required to
operate the Neon sign tubes depends upon :
(A) Diameter of the tube
(B) Gases in the tube
(C) Length of the tube
(D) Thickness of the tube
18. Soldering of a Britannia
joint is a necessity to avoid loosening of the joint due to :
(A) Vibrations and change in
atmospheric temperature
(B) Corrosion due to
galvanic action
(C) Corrosion due to atmospheric
changes
(D) Overheating
19. The testing of wiring
installation for insulation resistance to ensure that:
(A) All conductors have high
ohmic values in the circuit
(B) All outlet points are
earthed properly to ground
(C) Leakage current beyond
the stipulated value does not flow to earth
(D) Live and neutral
conductors in the installation are continuous
20. Braking torque in energy
meter is produced to:
(A) Brake the instrument
(B) Bring energy meter to
stand still
(C) Safeguard it against
creep
(D) Maintain steady speed
and equal to driving torque
21. The scale of dynamometer
type wattmeter is of:
(A) Uniform scale
(B) Logarithmic scale
(C) Non-linear scale
(D) Square law scale
22. The standard secondary
voltage for a PT used in power system in :
(A) 1V
(B) 5 V
(C) 50 V
(D) 110 V
23.Which instrument always
indicates true r.m.s. value irrespective of the waveform?
(A) Moving iron meter
(B) Digital voltmeter
(C) Thermocouple meter
(D) None of the above
24. A voltmeter gives
inaccurate reading to measure the drop across a low resistance because :
(A) The higher scale has
been selected
(B) The current drawn by the
meter is too low
(C) The sensitivity of the
meter is too low
(D) None of the above
25.The phase difference
between the currents in the two pressure coils in PF meter is :
(A) Approximately 0°
(B) Approximately 90°
(C) Exactly 0
(D) Exactly 90°
26. When a rewound armature
is rolled on the surface of a leveled surface plate the armature stops at the
same position of its periphery for each rolling, the portion of armature
touching the surface plate is regarded to have :
(A) higher weight than the
diametrically opposite portion
(B) lesser weight than the
diametrically opposite portion
(C) equal weight to that of
opposite portion
(D) higher weight than the
portion 90° to it on any one si
(A) Runs at constant speed
at all loads
(B) Suitable to supply only
mechanical load
(C) Can also be used for PF
improvement
(D) Not self starting
28. Which method is
generally adopted to measure the power in a three phase imbalanced load system?
(A) One wattmeter method
(B) Two wattmeter method
(C) Three voltmeter method
(D) Three wattmeter method
29. The colour of light
depends upon :
(A) Wave length
(C) Speed of light
(B) Frequency
(D) Frequency and wave
length
30. Which of the following
lamp is a cold cathode lamp?
(A) Neon lamp
(B) Sodium vapour lamp
(C) Mercury vapour lamp
(D) Fluorescent lamp
31. You have to repair
storage type water heater which has steam in the hot water. The possible remedy
for this trouble can be found by checking:
(A) All points for possible
leakages (B) The thermostat setting
(C) All wiring for loose
connections (D) Element for its condition
32. The reading on a 3 digit
millivolt meter started flashing continuously when connected across a resistor to measure the mV across it. The
reason for flashing of display on millivolt meter is that:
(A) The battery in the
instrument is weak (B) There is no battery in the instrument
(C) The measured value is
over range (D) The display is damaged
33.Which one of the
following measurement CANNOT be done with multimeter?
.(A)Current drawn by an
electronic circuit
(B)Supply voltage to DC
motor
(C)Continuity test of motor
winding
(I))Insulation resistance of
motor
34.Why a higher capacity
squirrel cage induction motor is not recommended for operating under low load
condition?
(A)Voltage drop in line will
be too much
(B)Power factor will be less
(C)Higher capacity motors
does not run at constant speed
(D)Torque is too much hence
it may cause damage
35.Shunts and multipliers
used in MC instruments are made up of Mangnin. The reason for using the above
metal is that, it has:
(A)Positive temperature co
-efficient of resistance
(B)Negative temperature co
-efficient of resistance
(C)Perfectly constant
temperature co -efficient of resistance
(D)Very low (practically
constant) temperature co -efficient of resistance
(A)Inductance
(B)Capacitance
(C)Resistance
(D)No extra device is needed
37.The power input increases
by three times when the connection of three phase loads changes from star to
delta at the same line voltage. What is the reason for this?
(A)The voltage across one
phase of the load is three times higher in delta connection
than in star connection
(B)The power factor
increases by three times in delta connection when compared to
star connection
(C)The line current is three
times higher in delta connection than in star connection
(D) . The voltage in each
phase increases by two times and the currant by 1.732 times
38. In a parallel resonant
circuit the capacitor current is:
(A)More than line current
(B)Less than line current
(C)Equal to line current
(D)None of the above
39. According to National
electric code what is the specified minimum distance between the Washing unit
and the switch board:
(A)0.6 metre
(B)1.3 metre
(C)2.5 metre
(D)3.4 metre
(A)Resonant frequency
(B)More than resonant
frequency
(C)Less than resonant
frequency
(D)None of the above
41.In the output voltage of
a DC generator the ripple effects can be reduced by increasing the:
(A)Field current
(B)Number of armature coil
(C)Number of turns in the
field winding
(D)Size of the conductor of
the armature coil
42. While installing power
sub -circuits in domestic installations it should be restricted to:
(A)800 watts with in 10
light and fan points
(B)800 watts within 2 outlets
(C)3000 watts within 10
light and fan points
(D)3000 watts within 2
outlets
43.What type of compounding
would be desirable in the DC generator feeding a long transmission line?
(A) Over compounding
(B)Under compounding
(C)Flat compounding
(D)Any one of the above
(A)Plugging
(B)Dynamic braking with self
excitation
(C)Regenerative braking
(D)Dynamic braking with
separate excitation
45.When a DC series motor is
connected to an AC supply. then:
(A)It will stop
(B)it may burnt out
(C)It will run without any
trouble
(D)It will run with less
efficiency and high spark at commutator
(A)To amplify voltage
(B)To reduce eddy current
losses
(C)To enhance flux density
(D)To provide mechanical
balance to the rotor
47. When the number of poles
and the number of armature conductors are fixed, then which winding of a DC
generator will give the higher e.m.f.?
(A)Wave winding
(B)Lap winding
(C)Same e.m.f. in tap and
wave winding
(D)Depends on other features
of design
(A)AC resistance is more
than DC resistance
(B)To reduce error due to
electrolytic e.m.f.
(C)AC wave form is pulsating
in nature
(D)AC contains sine wave
form
49.The basic function of
voltage stabilizer is to provide:
(A)Constant current supply
to load
(B)Constant power supply to
load
(C)Constant voltage supply
to load
(D)Uninterrupted supply to
load
50.A food mixture rated for
240 V AC fails to start when it is switched on. Which one of the following is
NOT a cause for the above?
(A)Jammed rotor
(B)Supply voltage is only
210 V
(C)OL relay is not re –set
(I))Open in armature winding
51.In a transformer the
leakage flux may be minimized by:
(A)Minimizing the number of
turns of both the winding
(B)Sectionalizing and
interleaving the primary and secondary winding
(C)Keeping the magnetizing
current to the minimum
(D))Reducing the reluctance
of the iron core to the minimum.
(A)Scott
(B)Double scott
(C)Star/star
(D)Star/double — delta
53.The phase relationship
between primary and secondary terminal voltage of a transformer is:
(A)Primary voltage is
leading the secondary voltage by 90°
(13)Secondary voltage is
leading the primary voltage by 90°
(C) 180° out of phase
(D)In the same phase
54The no load primary
current in an ideal transformer is:
(A)In phase with VI
(B)Leads VI by 90°
(C) Lags behind V1 by 90°
(I))Lags Vt by an angle
lying between Ce and 90°
55.An Opt coupler is a
single package of:
(A)LED and a signal diode
(13)LED and n photodiode
(C)Two photodiodes
(D)Two LEDs
56. One of the diode of a
bridge rectifier connected to 100 V 50 Hz AC input is found to be damaged. The
DC output of the circuit is 90 V. The minimum value of PIV of the diode required
for replacement is:
(A) 45V (B) 50 V
(C) 100 V (D) 150V
57. You are working with a
fully automatic star delta starter. You notice that when start switch is
pressed the motor starts in star but does not change to delta. The trouble will
be in:
(A) Delta contactor (B)
Timer and its circuit
(C) Star contactor (D) Line
contactor
58. Watt-hour meter is
classified as a:
(A) Deflecting instrument
(B) Indicating instrument
(C) Recording instrument (D)
Integrating instrument
59. Two pin sockets should
not be used in domestic wiring unless the appliance to be connected is:
(A) Double earthed (B)
Double insulated
(C) Controlled by ELCII (D)
Controlled by MCB
60. As load on induction
motor increases its power factor:
(A) Remain constant
(B) Goes on decreasing
(C) Goes on increasing over
after full load
(D) Goes on increasing up to
full load and then it falls again
61. During no load test of a
3 phase induction motor, the motor draws power:
(A) For core loss and copper
loss
(B) For copper loss and
windage -friction loss
(C) For core loss and
windage -friction loss
(D) Only for very small
copper loss
62. The recent method of
smooth speed control of a three-phase induction motor over a wide range is:
(A) Frequency control method
(B) Rotor resistance control method
(C) Voltage control method
(I)) None of the above methods
(A) To prevent rotor from
aligning and locking up with stator
(B) To give more uniform
torque
(C) To reduce humming noise
(D) Due to all above reasons
64. For 66 kV lines the
number of insulator discs used is:
(A) 3 (B) 6
(C) 10 (D) 12
65. AC resistance of a line
conductor is more than its DC resistance because of:
(A) Skin effect (B)
Proximity effect
(C) Skin effect and
proximity effect (I)) None of these
66. What type of insulator
will be used if the direction of the transmission line is changed?
(A) Strain type (B) Shackle
type
(C) Pin type (D) Suspension
type
67. The back emf set up in
the armature of a synchronous motor depends on;
(A) Rotor speed only
(13) Rotor excitation only
(C) Rotor excitation and
rotor speed
(D) Coupling angle, rotor
speed and excitation
68. The current drawn by an
over excited synchronous motor will be;
(A) Depending on the nature
of load (B) At lagging power factor
(C) At leading power factor
(D) At unity power fact
69. Two alternators are sharing an inductive toad equally. What will be happened if the excitation of one alternator is increased?
(A) Another alternator will
deliver more current
(B) Another alternator will
deliver less current
(C) Both will continue to
share load equally
(D) Both will deliver more
current
70. A ceiling fan rotates
slowly in either direction. The probable fault is:
(A) . An open in centrifugal
switch (13) An open in capacitor
(C) Short in the capacitor
(D) Blown fuse
71. In repulsion motor,
maximum torque is developed when:
(A) Brush axis is at 180 0
electrical to the field axis
(S) Brush axis is at 90°
electrical to the field aids
(C) Brush axis is at 45°
electrical to the field axis
(D) Brush axis coincides
with the field axis
72. Starting winding of a
single phase motor of a refrigerator is disconnected from the circuit by means
of a:
(A) Centrifugal switch
(B) Magnetic relay
(C) Thermal relay
(I)) None of the above
73. How the speed control of
universal motor used for sewing machine is done?
(A) Introducing friction
mechanism
\(B) Tapping the field at
various point
(C) Centrifugal mechanism
(D) Introducing a variable
resistance in series with the motor
(A) Gas pressure (B) Eddy
current
(C) Electrostatic induction
(D) Electromagnetic induction
75. The size of earth wire
is determined by;
(A) the atmospheric
condition
(B) the voltage of the
service wires
(C) the current capacity of
the service wires
(D) none of these
76. Earthing in consumer
premises is necessary to give protection against:
(A) Overloading (B) Danger
of electric shock
(C) Voltage fluctuation (D)
High temperature of the conductors
77. A single phase
protection switch is used to protect:
(A) The distribution
transformer
(B) The motor in case of
fuse failure
(C) The motor from the
daniage due to single phasing
(D) From the maximum
starting current of motor
78. The best location of the
power factor improving device to be installed in the transmission line is at:
(A) The receiving end (B)
The sending end
(C) Middle of the line (D)
Any place
79. Motor has series
characteristics.
(A) Capacitor start motor
(B) Shaded pole motor
(C) Repulsion motor (D) None
of the above
80. How the light output is
produced in electric discharge lamp?
(A) By heating effect of
current (B) By magnetic effect of current
(C) By ionisation in a gas
or vapour (D) By cathode ray emission
81. A social Reformer of
Kerala who started Atmavidhya Sangham was:
(A) Vaikunda Swamikal (B)
Brahmananda Sivayogi
(C) Thycaud AyyaVaikunda (D)
Vagbhadanandan
82. "The Career and
legend of VascodaGama" is a book written by:
(A) Sanjay Subramaniyam (B)
Arun Shourie
(C) Kushwant Singh (D) None
of these
83. Who among the foreign
travellers made earliest reference regarding Kerala?
(A) Marco Polo (B)
Megasthanese
(C) Ptolemy (D) Pliny
84. The Newspaper
"Sujananandini" was started by:
(A) C.V. Kunhiraman (B) C.
Krishnan
(C) Kesavan Asan (D)
Sahodaran Ayyapan
85. Under 42nd amendment
to our constitution the fundamental duties were enumerated This • concept of
fundamental duties was borrowed from the constitution of:
(A) USSR (B) Ireland •
(C) China (D) UK
86. The Rajya Sabha is a
body.
(A) a part of the Lok Sabha
(B) a temporary body
(C) a permanent body (D)
none of these
87. Article 368 deals with:
(A) Special Provision for
Jammu and Kashmir
(B) President rule in a
state
(C) Pertains to the
abolition of untouchability
(D) Amendment of the
Constitution
(A) Raja Ram Mohan Roy (B)
Dinbandhu Mitra
(C) Jyothirao Phttle (D)
R.N. Tager°
89. Which of the following
is one of the Harappan sites related to the maritime activities of the Harappan
people?
(A) Lothal (B) Kalibangan
(C) Rangpur (D) Mohanjodaro
90. The cold current which
meets with the warm gulf stream near Newfoundland?
(A) Humboldt (B) Canaries
(C) Benguala (D) Labrador
91. South Africa was
captured by Britain after the war.
(A) Opium war (B) Boer war
(C) Boxer Rebellion (D)
Carnatic war
92. The King of England
during the American war of independence:
(A) George MI (B) George ln
(C) Henry VIII (I)) Charles
Ia
93. The classical dance form
popular in the North-East parts of India:
(A) Bihu (B) Chiraw
(C) Nlanipuri (D) Kathak
94. The author of the famous
book "Fidelio”:
(A) T.S. Eliot (B) L.
Beethoven
(C) Lord Byron (D) George
Bernard Shaw
95. The Headquarters of
Economic and Social Commission for Asia and the Pacific (ESCAP) is at:
(A) Jakarta (R) Manila
(C) Kathmandu (D) Bangkok
96. Language in which
maximum number of Newspapersare published?
(A) Marathi (B) English
(C) Hindi (D) Bengali
97. French official book:
(A) Yellow book (B) White
book
(C) Green book (D) Blue book
98. The author of
"Truth, Love and a Little Malice":
(A) Boris Pasternak (B) U.
Thant
(C) Amita Malik (D)
Khushwant Singh
99. Who was the founder of
Scientific Astronomy?
(A) Hippalus (B) Hoffmann
(C) Hippocrates (D) None of
these
100. Who propounded the
signs of the Zodiac?
(A) Indians (B) Egyptians
(C) Babylonians (D) None of
these
035/2016 14 A