MCQOPTIONS
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MCQOPTIONS
This section includes 134 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Earth wire or ground wire is made of: |
| A. | copper |
| B. | aluminium |
| C. | iron |
| D. | galvanized steel |
| Answer» E. | |
| 102. |
Gauge factor in a strain gauge must be |
| A. | high |
| B. | low |
| C. | medium |
| D. | small |
| Answer» B. low | |
| 103. |
Which of the following is integrating instruments? |
| A. | power factor meter |
| B. | energy meter |
| C. | voltmeter |
| D. | ammeter |
| Answer» C. voltmeter | |
| 104. |
Dipsticks are used for the |
| A. | pressure measurement |
| B. | flow measurement |
| C. | displacement measurement |
| D. | level measurement |
| Answer» E. | |
| 105. |
An ammeter requires a change of 4A in its coil to produce a pointer deflectionof 8mm then its sensitivity is |
| A. | 2.5 mm/a |
| B. | 2.0 mm/a |
| C. | 0.5 mm/a |
| D. | none of the above |
| Answer» C. 0.5 mm/a | |
| 106. |
The wheatstone bridge cant be used for precision measurements becauseerrors are introduce into on account of : |
| A. | resistance of connecting leads |
| B. | thermo electric emf |
| C. | contact resistances |
| D. | all of the above. |
| Answer» E. | |
| 107. |
Loss of charge method is used to measure: |
| A. | low r |
| B. | high r |
| C. | low l |
| D. | high l |
| Answer» C. low l | |
| 108. |
The pressure coil of a wattmeter should be connected on the supply side ofthe current coil when |
| A. | load impedance is high |
| B. | load impedance is low |
| C. | supply voltage is low |
| D. | none of the above |
| Answer» B. load impedance is low | |
| 109. |
A megger indicates infinity when test terminals are open-circuited. This isbecause: |
| A. | no current flows through the current coil |
| B. | no current flows through the pressure coil |
| C. | no current flows through the compensating winding |
| D. | current does not flow through current coil and pressure coil |
| Answer» B. no current flows through the pressure coil | |
| 110. |
The spring material used in a spring control device should have the following property. |
| A. | should be non-magnetic |
| B. | most be of low temperature co-efficient |
| C. | should have low specific resistance |
| D. | all of the above |
| Answer» E. | |
| 111. |
A _____ device prevents the oscillation of the moving system and enables the latter to reach its final position quickly |
| A. | deflecting |
| B. | controlling |
| C. | damping |
| D. | any of the above |
| Answer» D. any of the above | |
| 112. |
Which of the following essential features is possessed by an indicating instrument ? |
| A. | deflecting device |
| B. | controlling device |
| C. | damping device |
| D. | all of the above |
| Answer» E. | |
| 113. |
Which of the following are integrating instruments ? |
| A. | ammeters |
| B. | voltmeters |
| C. | wattmeters |
| D. | ampere-hour and watt-hour meters |
| Answer» E. | |
| 114. |
_____ instruments are those which measure the total quantity of electricity delivered in a particular time. |
| A. | absolute |
| B. | indicating |
| C. | recording |
| D. | integrating |
| Answer» E. | |
| 115. |
Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured ? |
| A. | absolute instruments |
| B. | indicating instruments |
| C. | recording instruments |
| D. | integrating instruments |
| Answer» C. recording instruments | |
| 116. |
The change in the direction of a compass needle, when a current carrying wire is brought near, is called |
| A. | . electromagnetic deflection |
| B. | . electroscopic force |
| C. | magnetic force |
| D. | . electrostatic force |
| Answer» B. . electroscopic force | |
| 117. |
The use of _____ instruments is merely confined within laboratories as standardizing instruments. |
| A. | absolute |
| B. | indicating |
| C. | recording |
| D. | integrating |
| Answer» B. indicating | |
| 118. |
The major advantage of electromagnet type meter over a permanent magnet meter is |
| A. | . the electromagnet meter costs much less |
| B. | the permanent magnet meter has a more sluggish coil |
| C. | . the electromagnet meter need not be aligned with the earth’s magnetic field |
| D. | . the electromagnet meter is more rugged |
| Answer» E. | |
| 119. |
A voltmeter should have |
| A. | . low internal resistance |
| B. | . high internal resistance |
| C. | . electrostatic plates |
| D. | . a sensitive amplifier |
| Answer» C. . electrostatic plates | |
| 120. |
The ratio and phase angle errors in potential transformer may be reduced by |
| A. | increasing the exciting current |
| B. | increasing the resistance and leakage reactance in the transformer |
| C. | by not employing turns compensation |
| D. | none of the above |
| Answer» E. | |
| 121. |
Fluid friction damping can be used in |
| A. | horizontally mounted instruments |
| B. | vertically mounted instruments |
| C. | both horizontally mounted instruments and vertically mounted instruments |
| D. | none of the above |
| Answer» C. both horizontally mounted instruments and vertically mounted instruments | |
| 122. |
Which of the following instruments have least torque/weight ratio: |
| A. | dynamometer type |
| B. | pmmc |
| C. | attraction type moving iron |
| D. | repulsion type moving iron |
| Answer» B. pmmc | |
| 123. |
Measurement range of a voltmeter can be extended by using: |
| A. | high current resistance |
| B. | high series resistance |
| C. | low shunt resistance |
| D. | low series resistance |
| Answer» C. low shunt resistance | |
| 124. |
Electrostatic type instruments are mainly used for measurement of |
| A. | heavy currents |
| B. | low currents |
| C. | low voltages |
| D. | high voltages |
| Answer» E. | |
| 125. |
Which of the following voltmeter have least power consumption: |
| A. | moving iron |
| B. | hot-wire |
| C. | electrostatic |
| D. | induction type |
| Answer» D. induction type | |
| 126. |
An ammeter requires a change of 4A in its coil to produce a pointer deflection of 8mm then its sensitivity is |
| A. | 2.5 mm/a |
| B. | 2.0 mm/a |
| C. | 0.5 mm/a |
| D. | none of the above |
| Answer» C. 0.5 mm/a | |
| 127. |
The energy consumption of MI instrument as compared to MC instrument is: |
| A. | same |
| B. | more |
| C. | less |
| D. | very small |
| Answer» C. less | |
| 128. |
A galvanometer can be used for measuring current and voltage of a circuit by: |
| A. | shunt only |
| B. | connecting high value of resistance in series only |
| C. | shunt for measuring current and high resistance in series for voltage |
| D. | without shunt and series resistance |
| Answer» D. without shunt and series resistance | |
| 129. |
Moving coil instruments are: |
| A. | permanent magnet type |
| B. | dynamometer type |
| C. | induction type |
| D. | permanent magnet and dynamometer type |
| Answer» E. | |
| 130. |
The deflection torque can be produced by: |
| A. | gravity control |
| B. | spring control |
| C. | air friction |
| D. | magneitcally |
| Answer» E. | |
| 131. |
For increasing the range of an ammeter, connect: |
| A. | a high value resistance in series with the ammeter coil |
| B. | a high value resistance in parallel with the ammeter coil |
| C. | a low value resistance in parallel with the ammeter coil |
| D. | a low value resistance in series with the ammeter coil |
| Answer» D. a low value resistance in series with the ammeter coil | |
| 132. |
Chemical effect is used for the operation of: |
| A. | voltmeter |
| B. | ammeter |
| C. | ampere hour meter |
| D. | kwh meter |
| Answer» D. kwh meter | |
| 133. |
In spring control instruments, controlling torque: |
| A. | can be adjusted easily |
| B. | cannot be adjusted easily |
| C. | remains the same |
| D. | varies with the load |
| Answer» C. remains the same | |
| 134. |
Moving Iron instruments can be used on: |
| A. | ac and dc both |
| B. | ac only |
| C. | dc only |
| D. | none of the above |
| Answer» B. ac only | |