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0352016 Related Question Answers
1. The testing of wiring installation for insulation resistance to ensure that:
All conductors have high ohmic values in the circuit All outlet points are earthed properly to ground Leakage current beyond the stipulated value does not flow to earth Live and neutral conductors in the installation are continuous
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2. The scale of dynamometer type wattmeter is of:
Uniform scale Logarithmic scale Non-linear scale Square law scale
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3. Which method is generally adopted to measure the power in a three phase imbalanced load system?
One wattmeter method Two wattmeter method Three voltmeter method Three wattmeter method
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4. Which one of the following measurement CANNOT be done with multimeter?
Current drawn by an electronic circuit Supply voltage to DC motor Continuity test of motor winding Insulation resistance of motor
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5. Why a higher capacity squirrel cage induction motor is not recommended for operating under low load condition?
Voltage drop in line will be too much Power factor will be less Higher capacity motors does not run at constant speed Torque is too much hence it may cause damage
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6. A series RLC circuit takes leading power factor current at:
Resonant frequency More than resonant frequency Less than resonant frequency None of the above
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7. While installing power sub-circuits in domestic installations it should be restricted to:
800 watts with in 10 light and fan points 800 watts within 2 outlets 3000 watts within 10 light and fan points 3000 watts within 2 outlets
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8. What type of compounding would be desirable in the DC generator feeding a long transmission line?
Over compounding Under compounding Flat compounding Any one of the above
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9. Which one of the following connections is preferred for three-to-two phase conversion?
Scott Double scott Star/star Star/Double-delta
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10. An optocoupler is a single package of:
LED and a signal diode LED and a photodiode Two photodiodes Two LEDs
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11. Two pin sockets should not be used in domestic wiring unless the appliance to be connected is:
Double earth Double insulated Controlled by ELCB Controlled by MCB
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12. As load on induction motor increases its power factor:
Remain constant Goes on decreasing Goes on increasing over after full load Goes on increasing up to full load and then it falls again
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13. What type of insulator will be used if the direction of the transmission line is changed?
Strain type Shackle type Pin type Suspension type
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14. How the speed control of universal motor used for sewing machine is done?
Introducing friction mecca-nism Tapping the field at various point Centrifugal mechanism Introducing a variable resistance in series with the motor
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15. Earthing in consumer premises is necessary to give protection against:
Overloading Danger of electric shock Voltage fluctuation High temperature of the conductors
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16. A single phase protection switch is used to protect:
The distribution transformer The motor in case of fuse failure The motor from the damage due to single phasing From the maximum starting current of motor
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17. How the light output is produced in electric discharge lamp?
By heating effect of current By magnetic effect of current By ionization in a gas or vapour By cathode ray emission
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18. What will happen to the filter circuit in battery charger if the output filter capacitor is opened?
Will not function Will make humming noise More current will flow No output voltage
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19. Which is the application of delayed response type diazed fuse?
Motor circuits Heating circuits Lighting circuits Electronic circuits
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20. The force between two long parallel conductors is inversely proportional to:
Current in one conductor Distance between the conductors Radius of conductors Product of current in two conductors
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21. Which of the following circuit elements will oppose the change in the circuit current?
Inductance Resistance Capacitance All of the above
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25. Who among the foreign travellers made earliest reference regarding Kerala?
Marco Polo Megasthanese Ptolemy Pliny
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