1. A pure inductor has power factor of

1

1/route 2

0

None of these

2. A series RLC circuit resonate at 200 Hz. If the capacitance is increased to four times, the circuit will be in resonance at

100 Hz

200 Hz

400 Hz

800 Hz

3. The voltage phasor of a circuit is 10<15° V and the current phasor is A. The active and reactive powers in the circuit are

20 route 2 W and 10route 2 VAR

10 W and 10route 3 VAR

5 W and 5route 3 VAR

10 route3 W and 10 VAR

4. In the circuit shown in the figure, if the power consumed by the 5 W resistor is 10 then the power factor of the circuit is 5 W L 10 W 50 sin t

<img src='./qimages/3399-4.jpg'>
0.8

0.5

0.6

0

5. Resistance between terminals A and B of the given figure is

<img src='./qimages/3399-5.jpg'>
3/5 R

1/5 R

R

2/5 R

6. In the given circuit, Thevenin voltage across the terminal AB is

<img src='./qimages/3399-6.jpg'>
15 V

15 V

5 V

0 V

7. Calculate the value of load resistance RL to which maximum power may be transferred from the source shown in figure

<img src='./qimages/3399-7.jpg'>
33.73 ohm

60 ohm

73.33 ohm

100 ohm

8. If the p and T circuits in figure below are equivalent, then R1, R2, R3 respectively are

<img src='./qimages/3399-8.jpg'>

9. Find the value of in the circuit.

<img src='./qimages/3399-9.jpg'>
2 amp

3 amp

4 amp

1 amp

10. The current in the R 10 W resistance in the circuit below is

<img src='./qimages/3399-10.jpg'>
0 A

1 A

2 A

3 A

11. In the circuit below, the current through E2 is

<img src='./qimages/3399-11.jpg'>
9 A discharging

9 A charging

1 A discharging

1 A charging

12. For the circuit of the given figure, the value of current I is

<img src='./qimages/3399-12.jpg'>
1.0 A

0.75 A

0.5 A

0.25 A

13. The electrical energy consumed by an appliance of power rating P watts connected across its rated V for t hours is

P/V .tkWhr

Pt/1000 kWhr

Pt kWhr

pt/3600 kWhr

14.

<img src='./qimages/3399-14.jpg'>
Equivalent resistance between A in the figure above is

1.875 omegha

2.875 omegha

0.53 omegha

2.125 omegha

15. Norton equivalent of the circuit given below is

<img src='./qimages/3399-15.jpg'>

16. In the given circuit, inductances L1 and L2 if L1= 2L2and Leq is 0.7

<img src='./qimages/3399-16.jpg'>
0.4 H and 0.8 H respectively

0.6 H and 0.3 H respectively

0.8 H and 0.4 H respectively

1.0 H and 0.5 H respectively

17. <img src='./qimages/3399-17.jpg'>

18. In a six pole motor, 4 mechanical degrees is equal to

4 electrical degrees

2 electrical degrees

8 electrical degrees

12 electrical degrees

19. An ideal synchronous motor has no starting torque because the

Rotor is made up of salient poles.

Relative velocity between the stator and rotor mmfs is zero.

Relative velocity between stator and rotor mmfs is not zero.

Rotor winding is highly inductive.

20. At a slip of maximum possible speed of a 3-phase squirrel cage induction motor is

2880 rpm

3000 rpm

1500 rpm

1440 rpm

21. If the stator winding of a three-phase induction motor is delta connected, the rotor winding

should be delta connected

should be star connected

should not be delta connected

may be delta or star connected

22. Synchronous motors are to be used in situations where

The load is constant.

The load is required to be driven at very high speeds.

The load is to be driven at constant speed.

The starting torque requirement of the load is very high.

23. When excitation of synchronous motor is increased upto normal excitation from under excitation, armature current

increases

decreases

remains constant

None of the above

24. In a synchronous motor, damper winding is provided to

stabilize rotor motion

suppress rotor oscillations

develop necessary starting torque

and both

25. Direction of rotation of three phase induction motor can be reversed by

interchanging connections of any two phases

disconnecting any one phase

and both

None of the above

26. Variation in dc excitation of a synchronous motor causes variation in

Speed of motor

Power factor

Armature current

Both armature current and power factor

27. Reduction in supply voltage by 10% will change the torque of an induction motor by

38%

19%

9.5%

No change

28. The step angle of the stepper motor is 2.5°. If the stepping frequency is 3600 pulses per second, then the shaft speed will be

144 rps

3600 rps

25 rps

2.5 rps

29. A 3-phase, 50 Hz, 500 V induction motor develops 20 hp at slip of 5%. Mechanical losses are 1 hp, and stator loss is 1 kW. The efficiency will be

95.3%

90.5%

91.3%

85.3%

30. The electric motor used in toys is

capacitor start motor

split phase motor

shaded pole motor

None of these

31. AC servo-motor is basically a

Capacitor motor

Two phase motor

Three phase motor

Universal motor

32. Crawling in an induction motor is due to

Space harmonics produced by winding currents.

Time harmonics in supply.

Slip ring rotor.

Insufficient starting torque.

33. A shaded pole induction motor does not have the advantage of

Rugged construction

Low initial as well as maintenance cost

High starting torque

Comparatively small starting current

34. In three phase 400 volt, 50 Hz supply, the phase to neutral voltage is

220 Volt

230 Volt

440 Volt

150 Volt

35. Integration of unit ramp function gives

Unit parabolic function

Unit ramp function

Unit doublet function

None of these

36. In house wiring, Black Green wires indicate

Earth Neutral respectively

Phase Neutral respectively

Phase Earth respectively

Neutral Earth respectively

37. Ferranti effect on long overhead lines is experienced when

the line is highly loaded.

the power factor is unity.

the power factor is leading.

corona effect is dominated.

38. A 10 kVA, 400 V/200 single-phase transformer with 10% impedance, draws a steady short circuit current of

50 A

150 A

250 A

350 A

39. Kick fuses are used across relay coils to prevent relay operation during

Heavy external faults

Inrush current of transformer when they are energised

Line to ground faults

Bolted faults

40. For a fuse wire of diameter fusing current is proportional to d1.2 d1.5

route d

d1.2

d1.5

None of these

41. Differential relays are used for the protection of equipments against

Internal faults

Over current

Reverse current

Reverse power

42. A 3-phase circuit breaker is rated at 1250 2000 MVA, 33 kV, 4s. Its making current capacity will be

35 kA

89 kA

79 kA

69 kA

43. Main function of the fuse is to

Protect the line

Open the circuit

Protect the appliance

Prevent excessive current

44. Distribution voltage levels in India are

11 kV, 400 3 f

33 kV, 11 kV, 3 f

220 kV, 11 kV, 3 f

None of the above

45. By burden on the relay, we generally mean

Current rating of relay

Voltage rating of relay

Volt-ampere rating of relay

Watt rating of relay

46. In a static over-current relay, inverse time characteristics are obtained by

A differentiating circuit

An integrating circuit

A transistor amplifier

A transistor switch

47. At atmospheric pressure, the dielectric strength of SF6 is about

2.5 times of air

2.5 times of oil

2.5 times of vacuum

None of the above

48. Mho relay is

current restrained current relay.

voltage restrained directional relay.

current restrained directional relay.

voltage restrained current relay.

49. Main purpose of oil in OCB is to

provide insulation

provide cooling of contacts

quenching arc

None of the above

50. Which of the following circuit breaker is generally used in railway electrification

Air Blast circuit breaker

Minimum Oil circuit breaker

Bulk Oil circuit breaker

SF6 circuit breaker

51. Isolators are used for disconnecting a circuit when

Line is energised

Line is on full load

Line carries no current

Can be operated under any condition

52. The transmission line feeding power on either side of the main transmission line is called

Secondary distribution

Secondary transmission

Primary transmission

Primary distribution

53. What is the approximate value of average resistance of a human body

1 k omegha

5 k omegha

10 k omegha

15 k omegha

54. The skin effect of the conductor increases the effective value of

Inductance of the conductor

Resistance of the conductor

Capacitance of the conductor

None of these

55. Which portion of the transmission system is more prone to faults

Alternator

Transformer

Overhead lines

Underground cables

56. The insulation strength of EHV lines is mainly governed by

Switching over voltages

Lightning over voltages

Power frequency over voltages

Dynamic over voltages

57. Pilot relaying schemes are used for the protection of

Bus bars

Transformer

Instrument transformer

Transmission line

58. The restriking voltage is measured in

RMS value

Peak value

Instantaneous value

Average value

59. In an n-bus power system, considering n-nodes network, the size of y bus is

×

×

n × n

2n × 2n

60. Which fault gives rise to symmetrical fault currents

Single line to ground fault

Line to line fault

Double line to ground fault

Three phase fault

61. Typical solar cell efficiency is

Less than

12% to 25%

30% to 40%

More than 50%

62. India receives solar energy in the range of

5-7 kWh/m2 for 300-330 days in a year

50-70 kWh/m2 for 300-330 days in a year

5-7 kWh/m2 for 200-230 days in a year

50-70 kWh/m2 for 200-230 days in a year

63. Biogas comprises mainly of

60% oxygen and 40% carbon dioxide

60% oxygen and 40% methane

60% methane and 40% oxygen

60% methane and rest carbon dioxide

64. Global warming is mainly due to

Emission of heat from engines

Emission of CO2 due to burning of fossil fuels

Use of nuclear energy

Air pollution

65. The possible site for Geothermal energy extraction for the purpose of electricity in India is

Madhya Pradesh

Kerala

Tamil Nadu

Assam

66. Horizontal axis and vertical axis are the types of

Nuclear Reactor

Wind Mills

Bio Gas Reactor

Solar Cell

67. The Fill Factor of a silicon solar cell is approximately

1

0.7

0.5

0

68. Major share of power generated in India is through

Thermal Power Plants

Nuclear Power Plants

Hydro-electric Power Plants

Solar energy

69. Match Lists L-I and L-II below, in respect of India's installed capacity of non- conventional energy, as on date.

L I L II

1. Solar Power A. 2800 MW

2. Wind Power B. 3063 MW

3. Bagass Cogeneration C. 1365 MW

4. Biomass Power D. 22,465 MW

1 2 3 4
A B C D

B A C D

D B A C

B D A C

70. When a body reflects all the radiations incident on it, then the body is known as

White body

Grey body

Black body

Transparent body

71. A diesel power station spends 0.25 kg/kWh fuel. If the calorific value is 10,000 kcal/kg then overall efficiency of the power station will be

25%

30%

34.4%

100%

72. Admittance is the reciprocal of

Impedance

Reactance

Susceptance

Inductance

73. An inductor at t with zero initial conditions acts as

short circuit

open circuit

current source

voltage source

74. In the circuit shown, if we connect a source of 2 volt with internal resistance of 1 W at AA with positive terminal at then the current through R is 1 W

<img src='./qimages/3399-74.jpg'>
2 A

1.66 A

1 A

0.625 A

75. Which of the following statements pertains to resistors only

They oppose sudden change in voltage.

They can act as energy storage device.

They can dissipate desired amount of power.

None of the above.

76. What is the maximum number of points of light, fan and socket-outlets that can be connected in one sub-circuit

5

10

20

30

77. Minimum distance of underground cable from the foundation of building should be

100 cm

50 cm

10 cm

5 cm

78. Official systemetic, scientific study of energy consumption by the related organisation for cost reduction and energy conservation is

energy policy

energy audit

and both

None of the above

79. The type of wiring that is highly suitable for a temporary shed is

Cleat wiring

Wooden capping and casing wiring

Lead sheathed wiring

Conduit wiring R 2 W1 W A¢ A 1 A

80. Current i4 in the figure will be

<img src='./qimages/3399-80.jpg'>
13 amp

0.5 amp

4.5 amp

8.5 amp

81. Find power absorbed/delivered by 120 V source.

<img src='./qimages/3399-81.jpg'>
120 watts

240 watts

2 watts

1 watt

82. In the circuit, VS is

<img src='./qimages/3399-82.jpg'>
8 V

10 V

12 V

16 V

83. The characteristic equation of the series RLC circuit is

<img src='./qimages/3399-83.jpg'>
S2 S R/L 0

S2 S L/R 0

S2 S LC 0

S2 S 1/LC 0

84. A network has 10 nodes and 17 branches. The number of independent mesh equations required to solve the network is

7

8

10

45

85. Which of the following elements is not bilateral

Resistor

Inductor

Capacitor

Transistor

86. Each branch of Y-connected load has resistance of 10 W. The resistance of each branch of an equivalent D-connected load will be

30 omegha

100 omegha

110 omegha

None of these

87. In applying superposition theorem, to determine branch currents and voltages

all current and voltage sources are shorted.

only current sources are open circuited.

only voltage sources are shorted.

voltage sources are shorted and current sources are open circuited.

88. In the circuit, the maximum power that can be transferred to Load ZL is

<img src='./qimages/3399-88.jpg'>
250 W

500 W

1000 W

2000 W

89. The material used for fuse wire should be of

low resistivity and high melting point

high resistivity and high melting point

high resistivity and low melting point

low resistivity and low melting point

90. It is desired to illuminate a drawing hall with an average illumination of about 250 lux. The area of hall is 30 m × 20 m. The lamps are to be fitted at 5 m height. Find the number and size of incandescent lamps required for an efficiency of 12 lumen/watt. Utilization factor 0.4 and maintenance factor 0.85.

40 and 1000 W

20 and 500 W

60 and 1000 W

None of the above

91. Battery operated scooter for braking uses

plugging

mechanical braking

regenerative braking

rheostatic braking

92. In spot welding, electric supply used is

low voltage high current

high voltage low current

low voltage low current

high voltage high current

93. In the process of refining of metals, the impure metal is made as

Cathode

Anode

Electrolyte

None of the above

94. Minimum clearance above ground of the lowest conductor of an overhead line erected along a street for low and medium voltages as per "Indian Electricity Rules" is

4.5 metres

6.1 metres

6.5 metres

5.5 metres

95. Synchronous capacitor is

An ordinary static capacitor bank.

An over excited synchronous motor driving mechanical load.

An over excited motor running without mechanical load.

None of the above

96. In terms of cost, overhead transmission line is better than underground transmission line in the field of

Insulation

Right of way

Visibility

None of these

97. Materials used in plate earthing are

Wood coal

Salt, earthing plate

and both

None of the above

98. The rating of fuse wire is always expressed in

volts

amperes

ampere-volt

ampere-hours

99. An automatic power factor controller cannot achieve

Voltage control

kVAR control

kW control

pf control

100. A single phase energy meter has a constant of 1200 revolution/kWh. When a load of 200 W is connected, the disc rotates at 4.2 revolutions per min. If the load is on for 10 hours, the meter records an excess of

0.1 kWh

0.2 kWh

1.0 kWh

2.0 kWh

101. Aluminium conductor cables can be joined by

Gas welding

Soldering

Compression

Thermit welding

102. From the point of view of safety, the resistance of earthing electrode should be

Low

High

Medium

The value of resistance of earth does not affect the safety

103. The insulating fluids that are commonly used in circuit breakers is/are

SF6

Air at atmospheric pressure

Compressed air

All of the above

104. Which of the following test is carried out to ensure the sufficient strength of insulation between two or more conductors to avoid leakage between them

Testing of insulation resistance between wiring and earth

Testing of insulation resistance between conductors

Testing of polarity of single phase switch

Testing of earth continuity path

105. An isolated sphere has a capacitance of 50 pf. If its potential is raised to 104 volts, radius 1 and charge will be respectively. Given that 1/4pieepsola0=9x109 m

54 cm, 0.5 µC

4.5 cm, 5.0 µC

45 cm, 0.5 µC

5.4 cm, 5.0 µC

106. Which distribution system is more reliable

Ring main system

Tree system

Radial system

All are equally reliable.

107. HV transmission lines use

Pin type insulators

Suspension insulators

Both and

None of the above

108. For proper earthing, what should be the maximum value of earth resistance while carrying out the testing of earth continuity path

1 omegha

2 omegha

5 omegha

10 omegha

109. The advantage of using pulverized fuel include

Higher boiler efficiency

Easy and complete combustion

Low air requirement

All of the above

110. 1 Ton (unit of air conditioning load) in terms of kW is

3.5 kW

4.7 kW

12 kW

10.5 kW

111. In steam locomotive, electric power is provided through

Battery system

Diesel engine generator

Overhead wire

Small turbo generator

112. Which of the following methods of heating is not dependent on the frequency of supply

Induction heating

Dielectric heating

Electric Resistance heating

All of the above

113. A single-phase AC arc welding transformer supplies approximately

100 volts at 0.35 power factor

60 volts at 0.35 power factor

220 volts at 0.8 power factor

100 volts at 0.6 power factor

114. Long distance railways use for their electric traction

200 V dc

25 kV single phase ac

25 kV two phase ac

25 kV three phase ac

115. Which type of motor is used for elevators

Synchronous motor

Inductor motor

Split phase motor

All of the above

116. Minimum wind speed required for generating electricity in a wind mill is

15 m/hour

1 km/hour

15 km/hour

None of the above

117. The rotor of a stepper motor has no

Winding

Commutator

Brushes

All of the above

118. The colour having shortest wavelength in the following is

Yellow

Blue

Orange

Green

119. A synchronous motor is essentially a motor with

Constant speed

Leading power factor

Unity power factor

Lagging power factor

120. At low values of slip, the torque of an induction motor is

directly proportional to the square of the slip.

inversely proportional to the square of the slip.

directly proportional to the slip.

inversely proportional to the slip.

121. An infinite bus-bar has

constant voltage

constant frequency

infinite voltage

both and

122. If the supply frequency of a 3-phase induction motor is then frequency of rotor emf at motor slip will be

sf

s)f

f/s

None of these

123. If a four pole synchronous generator driven at 1500 rpm feeds a 6-pole induction motor, which is loaded to run at a slip of then speed of the motor will be

1000 rpm

950 rpm

1500 rpm

1450 rpm

124. Which of the following vapour/gas will give yellow colour

Helium

Mercury

Sodium

Magnesium

125. If the distance between the light source and the surface is reduced to half, the illumination on the surface will

reduce to half of the original.

reduce to one fourth of the original.

increase to double of the original.

increase to four times of the original.

126. 80% Ni, 20% Cr is called as

Constantan

Nichrome

Kanthal

None of these

127. Electric arc welding process produces temperature upto

1000 °C

1500 °C

3500 °C

5550 °C

128. During the resistance welding heat produced at the joint is proportional to

I2R

kVA

Current

Voltage

129. Which of the following motors is used in household refrigerators

AC series motor

DC shunt motor

Reluctance motor

Single phase induction motor

130. The PLC was invented by

Bill Gates

Dick Morley

Bill Landis

Tod Cunningham

131. Match the Lists L-I and L-II.

L I L II

1. Bolometer A. Flow

2. H-Bridge B. Displacement

3. LVDT C. Radiation

4. Anemometer D. DC Motor

1 2 3 4

C D B A

D C A B

A C B D

D C B A

132. Which meter is suitable for the measurement of 10 mV at 50 MHz

Moving iron voltmeter

CRO

Electrostatic voltmeter

VTVM

133. Programmable Logical controllers are the devices that were invented basically to replace

Switches

Circuit Breakers

Relays

None of the above

134. Load cell essentially is a

Thermistor

Strain gauge

Photo-voltaic cell

None of these

135. Stranded wires are mainly used to

reduce skin effect

reduce metal fatigue

reduce proximity effect

both and

136. The method suitable for heating of a conducting medium is

Induction heating

Indirect arc heating

Eddy current heating

Resistance heating

137. A power plant has to supply loads as follows

12 pm to 5 am 500 kW; 2 pm to 5 pm 2500 kW 5 am to 10 am 800 kW; 5 pm to 8 pm 2000 kW 10 am to 12 noon 2000 kW; 8 pm to 10 pm 1500 kW 12 noon to 2 pm 1000 kW; 10 pm to 12 pm 1000 kW Total units during 24 hours and load factor will be respectively

51.66 units, 31%

31k units, 51.66%

31k units, 33%

None of the above

138. A large size synchronous generator is protected against overloads by

over current relay

mho relay

temperature sensitive relay

Buchholz relay

139. Earth resistance comprises of A. Resistance of soil away from electrode. B. Contact resistance between electrode and soil. C. Resistance of metal electrode

A only

A and B only

A and C only

B and C together

140. When cathode is positive with respect to anode in an SCR, the number of blocked p-n junctions is

1

2

3

4

141. If a forward voltage (less than forward breakover voltage) is suddenly applied across anode and cathode of a thyristor, it may result into

Damage to the thyristor

Premature triggering of the thyristor because of high dV/dt

Reduced holding current of the thyristor

All of the above

142. Match the List-I and List-II below

List I List II

<img src='./qimages/3399-142.jpg'>
1 2 3 4

A C B E

A B C D

C E B A

C E D A

1.

2.

3.

4.

143. The average gate power dissipation for an SCR is 0.5 W. Gate voltage variation is 2 V to 10 V. Which of the following is true

Vg 2 Ig= 0.25 A
V 10 0.05 A

Vg 2 Ig= 0.05 A
Vg 10 Ig= 0.25 A

Vg 2 Ig 10 A
V g 10 Ig 2 A

None of the above

144. In a thyristor d.c. chopper, which type of commutation results in best performance

Voltage commutation

Current commutation

Load commutation

Supply commutation

145. For a symmetrical square wave of 800 V peak to peak and for ideal diode, the voltmeter in the given figure will read

<img src='./qimages/3399-145.jpg'>
200 V

400 V

800 V

zero

146. The power supply whose output voltage varies with variation in input voltage or output load current is known as

Regulated Power Supply

Unregulated Power Supply

Uninterruptible Power Supply

Switched Mode Power Supply

147. For an SCR, dV/dt protection is achieved by the use of

RL in series with SCR

L in series with SCR

RC in series with SCR

RC across SCR

148. SMPS are superior to linear power supplies in respect of

size and efficiency

efficiency and regulation

regulation and noise

noise and cost

149. A single phase, half-wave, controlled rectifier has 400 sin (314 as the input voltage and R as the load. For a firing angle of 60° for the SCR, the average output voltage is

240/pie

400/pie

300/pie

200/pie

150. Which of the following modulation techniques is mostly used in inverters

Pulse width modulation

Square wave output modulation

Both and

Neither nor

151. An IGBT has three terminals called

Collector, Emitter and Base

Drain, Source and Base

Drain, Source and Gate

Collector, Emitter and Gate

152. A UPS commonly has following parts rectifier inverter static switch Which of the following is true

only

only and

and

only and

153. <img src='./qimages/3399-153.jpg'>

If alpha is the duty cycle type and output voltage of the chopper circuit above is

154. When the SCR conducts, the forward voltage drop will

0.7 V at all load current

2 to 2.5 V at all load current

increases slightly with load current

remains constant with load current

155. A separately excited dc motor is required to be controlled, from a 3-phase supply, for its operation in the first quadrant only. The most preferred converter would be

3-phase fully controlled converter

3-phase fully controlled converter with free wheel diode

3-phase dual converter

3-phase half wave converter

156. For an SCR with turn-on time of 5 microsecond, an ideal trigger pulse should have

short rise time with pulse width 3 µsec

long rise time with pulse width 6 µsec

short rise time with pulse width 6 µsec

None of the above

157. Cyclo converter drives are generally employed in

Traction

Milling

Generating low frequencies

Generating pulses

158. In a dual converter, the circulating current

allows smooth reversal of load current but increases the response time.

allows smooth reversal of load current with improved speed of response.

does not allow smooth reversal of load current but reduces response time.

flows only if there is no interconnecting conductor.

159. A cyclo converter is a

naturally commutated device

forced commutated device

can be commutated in both manner

None of the above

160. The separately excited dc motor in the figure below has a rated armature current of 20 A and a rated armature voltage of 150 V. An ideal chopper switching at 5 kHz is used to control the armature voltage. If La= 0.1 mH, Ra= 1W, neglecting armature reaction, the a a duty ratio of the chopper to obtain 50% of the rated torque at the rated speed and the rated field current is

<img src='./qimages/3399-160.jpg'>
0.4

0.5

0.7

0.8

161. An open-loop system is better than a closed-loop system in terms of

Accuracy

Stability

Noise reduction

Sensitivity

162. A CRO cannot be used for direct measurement of

Voltage

Current

Frequency

Power

163. The cycle time of a PLC is the time it takes to

read all the input signals.

read all the input signals, run the program and update outputs.

read an input signal.

check all the input signals against the program.

164. The thermocouple pair that gives the maximum sensitivity around 273 °k is

Platinum Constantan

Nichrome Constantan

Nickel Constantan

Copper Nickel

165. An inverse transducer converts

electrical energy to any other form of energy

electrical energy to light energy

mechanical displacement into electrical signal

electrical energy to mechanical form

166. Optical Pyrometer is used to measure

Light Intensity

Low Temperature

High Temperature

Light Intensity High Temperature

167. Horizontal deflection plates of CRO are placed generally

Horizontal

Vertical

Diagonal

or

168. A controller essentially is a/an

Amplifier

Sensor

Comparator

Clipper

169. Programming Languages for PLC is/are

Ladder Diagram

Function Block Diagram

Structured Text

All of the above

170. To measure insulation resistance of equipments of voltage rating upto 440 V the megger generator must generate

220 V

440 V

500 V

None of these

171. Lissajous pattern obtained on a CRO screen is a circle. Frequency of two signals are

Equal

Unequal

Zero

Infinity

172. Indicating instruments should be

undamped

critically damped

over damped

under damped

173. A megger is to measure insulation resistance of a cable. The cable should be connected to

Battery

DC supply

AC supply

No supply

174. A strain gauge is a passive transducer and is employed for converting

Pressure into change in resistance

Force into displacement

Mechanical displacement into a change of resistance

None of the above

175. A megger is basically a/an

Moving iron type instrument

Moving coil type instrument

Hot wire instrument

Electrolytic instrument

176. The dynamic characteristics of capacitive transducer are similar to those of

Low-pass filter

High-pass filter

Notch filter

Band-stop filter

177. The insulation resistance test is performed on power lines with

ohm meter

earth tester

megger

Any of these

178. Piezo meter is used to measure

Very high pressure

Very low pressure

Displacement

None of these

179. Which of the following devices is used to measure flow in an open channel

Venturimeter

Rota meter

Orifice

Pitot tube

180. The ladder diagram for the circuit shown below is

<img src='./qimages/3399-180.jpg'>