MCQOPTIONS
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MCQOPTIONS
This section includes 1177 Mcqs, each offering curated multiple-choice questions to sharpen your Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 501. |
Earth wire is fitted in conduit pipe wiring? |
| A. | by Shedl |
| B. | by earth clip |
| C. | by both A and B |
| D. | none of these |
| Answer» C. by both A and B | |
| 502. |
What conductor is used? |
| A. | for KW |
| B. | For KVA |
| C. | For KVAR |
| D. | For KVL |
| Answer» D. For KVL | |
| 503. |
Use of railway signal and underground? |
| A. | V. I. R. Wire |
| B. | tropodure wire |
| C. | PVC wire |
| D. | lead covered wire |
| Answer» C. PVC wire | |
| 504. |
Which of the following meter has a linear scale? |
| A. | thermocouple meter |
| B. | moving iron meter |
| C. | hot wire meter |
| D. | moving coil meter |
| Answer» E. | |
| 505. |
Will it be used to measure voltage? |
| A. | Watt meter |
| B. | ampere meter |
| C. | energy meter |
| D. | voltmeter |
| Answer» E. | |
| 506. |
The reason for heating of single phase motors is? |
| A. | more friction in bearings |
| B. | overload |
| C. | coil fault |
| D. | any or all of the above |
| Answer» E. | |
| 507. |
What is the rating of three phase induction motor? |
| A. | KW |
| B. | KVA |
| C. | HP |
| D. | LEFT |
| Answer» D. LEFT | |
| 508. |
When a motor operating at zero load suddenly ceases to excite? |
| A. | motor will act as alternator |
| B. | motor will stop |
| C. | motor will keep running |
| D. | motor coil will burn |
| Answer» C. motor will keep running | |
| 509. |
What is the ionization potential of a sodium vapor lamp? |
| A. | 220 V |
| B. | 110 V |
| C. | 50 V |
| D. | 5 V |
| Answer» E. | |
| 510. |
Used to reduce commutation? |
| A. | vibration setting winding |
| B. | Interpol |
| C. | main pole |
| D. | none of the above |
| Answer» C. main pole | |
| 511. |
On increasing the time constant resistance (R) of RC circuit? |
| A. | decreases |
| B. | grows |
| C. | A and B above |
| D. | none of the above |
| Answer» C. A and B above | |
| 512. |
The conductor material used for coiling the main field in the generator is? |
| A. | meganin |
| B. | Carbon |
| C. | iron |
| D. | copper |
| Answer» E. | |
| 513. |
Phase voltage is measured in? |
| A. | between line and neutral |
| B. | between line and phase |
| C. | Both A and B are wrong |
| D. | none of these |
| Answer» B. between line and phase | |
| 514. |
The ends at which the supply will be given in a transformer are called windings. |
| A. | secondary winding |
| B. | primary winding |
| C. | both A and B |
| D. | none of these |
| Answer» C. both A and B | |
| 515. |
Metals exhibit the property of superconductivity? |
| A. | at the highest temperature and pressure |
| B. | near the triple point |
| C. | near critical temperature |
| D. | near absolute zero |
| Answer» E. | |
| 516. |
What is the power factor of a pure inductive circuit? |
| A. | Zero leading |
| B. | zero lagging |
| C. | Unity |
| D. | All of the above |
| Answer» C. Unity | |
| 517. |
Compounder generator has two windings? |
| A. | series interpol |
| B. | Series and shunt widening |
| C. | Series and compensating winding |
| D. | Interpol winding and vibration setting winding |
| Answer» C. Series and compensating winding | |
| 518. |
Bakholz relay is used for? |
| A. | in furnace transformer |
| B. | in air cooled transformer |
| C. | in oil cooled transformer |
| D. | in welding transformer |
| Answer» D. in welding transformer | |
| 519. |
Positive ions are attracted in a mercury of rectifier? |
| A. | Mercury pool side |
| B. | bottom side of shell |
| C. | on the cathode side |
| D. | on the anode side |
| Answer» D. on the anode side | |
| 520. |
What is the cause of deceleration in synchronous motor? |
| A. | more friction in bearings |
| B. | zero load |
| C. | increase in air gap |
| D. | variable load |
| Answer» E. | |
| 521. |
a transformer? |
| A. | the amplifier is |
| B. | is a dynamic machine |
| C. | have rotary converter |
| D. | A static machine working on the principle of induction is |
| Answer» E. | |
| 522. |
When increasing the power factor, the synchronous motor is called? |
| A. | Motor like synchronous condenser |
| B. | induction motor |
| C. | Slipper motor |
| D. | all of the above |
| Answer» E. | |
| 523. |
What is detected by open circuit test? |
| A. | voltage loss |
| B. | Copper loss |
| C. | iron loss |
| D. | none of the above |
| Answer» D. none of the above | |
| 524. |
Which fluorescent lamp can be used in flashing circuit? |
| A. | quick start lamp |
| B. | pre-heated lamp |
| C. | ballast lamp |
| D. | quick start lamp |
| Answer» E. | |
| 525. |
Per watt of light emitted by a fluorescent lamp is? |
| A. | 60 lumens |
| B. | 10 lumens |
| C. | 20 lumens |
| D. | 200 lumens |
| Answer» B. 10 lumens | |
| 526. |
As a precaution, the control switch of the geyser should be installed? |
| A. | inside bath room |
| B. | outside the bathroom |
| C. | near main switch |
| D. | none of these |
| Answer» C. near main switch | |
| 527. |
In which wiring is the master switch used? |
| A. | Godas Wiring |
| B. | tunnel wiring |
| C. | corridor wiring |
| D. | hostel wiring |
| Answer» E. | |
| 528. |
What should be the resistance of a new thermostat switch? |
| A. | Total Oh or Nil only |
| B. | only oh |
| C. | mag ohy |
| D. | infinite |
| Answer» B. only oh | |
| 529. |
Moving iron scales? |
| A. | is the same |
| B. | tight in the middle |
| C. | tight at the beginning and at the end |
| D. | all of the above |
| Answer» D. all of the above | |
| 530. |
The latest among fluorescent lamps is? |
| A. | glow lamp |
| B. | pre-heated lamp |
| C. | quick start lamp |
| D. | quick start lamp |
| Answer» B. pre-heated lamp | |
| 531. |
What is the best insulating liquid for transformer? |
| A. | grade mineral oil |
| B. | mineral oil |
| C. | Water |
| D. | hydrogen liquid |
| Answer» E. | |
| 532. |
what kind of d |
| A. | MG SAT |
| B. | rotary converter |
| C. | Metal rectifier |
| D. | Mercury of rectifier |
| Answer» D. Mercury of rectifier | |
| 533. |
The above method of heating plastic materials is? |
| A. | dielectric heating |
| B. | resistance heating |
| C. | Heating in a coal fired furnace |
| D. | oil fired furnace |
| Answer» B. resistance heating | |
| 534. |
Are installed to protect overhead lines from lightning? |
| A. | relay |
| B. | lightning clever |
| C. | starter |
| D. | none of these |
| Answer» C. starter | |
| 535. |
Which motor is used in constant speed machines eg lathe blowers fans etc.? |
| A. | dc shunt motor |
| B. | Cumulative compounder motor |
| C. | dc range motor |
| D. | All of the above |
| Answer» B. Cumulative compounder motor | |
| 536. |
What is the ratio of magnetic intensity and magnetic force called? |
| A. | relative magnetism |
| B. | Magnetic tendency |
| C. | flux density |
| D. | none of the above |
| Answer» C. flux density | |
| 537. |
The main reason for changing the speed of the motor under Ward Leonard control is? |
| A. | Motor field stimulation |
| B. | supply voltage |
| C. | motor armature current |
| D. | voltage used on armature |
| Answer» E. | |
| 538. |
A conductor rotates in a magnetic field, under which conditions the voltage produced will be zero? |
| A. | at every place |
| B. | in the direction perpendicular to the magnetic field |
| C. | in the direction of the magnetic field axis |
| D. | none of the above |
| Answer» D. none of the above | |
| 539. |
The above method of heating conducting materials is |
| A. | vortex method |
| B. | induction method |
| C. | radiation method |
| D. | indirect method |
| Answer» C. radiation method | |
| 540. |
Do Empire sleeves work? |
| A. | When the coil is inside the slot |
| B. | above terminal plate |
| C. | to mount on the connection lead |
| D. | All of the above |
| Answer» D. All of the above | |
| 541. |
Do cars have dynamos? |
| A. | Of compound generator |
| B. | of series generator |
| C. | of DC shunt generator |
| D. | all of the above |
| Answer» D. all of the above | |
| 542. |
Are there ways to test new wiring? |
| A. | Meaning test of drivers |
| B. | open circuit test |
| C. | short circuit test |
| D. | all of the above |
| Answer» E. | |
| 543. |
Overcharging and discharging the battery continuously? |
| A. | plates start turning |
| B. | plates begin to break |
| C. | sulfation occurs |
| D. | Depolarization occurs |
| Answer» B. plates begin to break | |
| 544. |
At present it is made on a large scale for domestic use. |
| A. | capacitor motor |
| B. | stepper motors |
| C. | Universal Motors |
| D. | repulsion motors |
| Answer» B. stepper motors | |
| 545. |
What is the negative electrode in Daniel cell? |
| A. | of brass |
| B. | of zinc |
| C. | of copper |
| D. | none of the above |
| Answer» C. of copper | |
| 546. |
What is the positive plate in Laklanchi cell? |
| A. | carbon rod |
| B. | copper rod |
| C. | steel rod |
| D. | zinc rod |
| Answer» B. copper rod | |
| 547. |
What is the color of the light first when a sodium vapor lamp is switched on? |
| A. | Yellow |
| B. | pink-red |
| C. | Green |
| D. | Blue |
| Answer» C. Green | |
| 548. |
What are the factors affecting resistance to meaning? |
| A. | depth of electrode |
| B. | soil temperature |
| C. | Earth's soil condition |
| D. | all of the above |
| Answer» E. | |
| 549. |
Earthing is done near the building? |
| A. | on the roof of the building |
| B. | ten meters from the corner |
| C. | two meters from the corner |
| D. | all of the above |
| Answer» D. all of the above | |
| 550. |
What does the thumb represent in the left hand rule? |
| A. | to the stream |
| B. | to the magnetic field |
| C. | to voltage |
| D. | the force on the driver |
| Answer» E. | |