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.
| 351. |
Two bulbs are marked 100W/220V and 40W/220V. Which bulb will have more resistance? |
| A. | 40W Bulb |
| B. | 100W Bulb |
| C. | both will have the same resistance |
| D. | none of the suitable |
| Answer» B. 100W Bulb | |
| 352. |
Find the direction of the magnetic field around the conductor? |
| A. | by the law of cork screw |
| B. | by left hand rule |
| C. | by right hand rule |
| D. | by Farad's law |
| Answer» E. | |
| 353. |
When screen coils are used for central winding in a motor, the safest method is? |
| A. | Kundali group number for one veshana |
| B. | Soldering the End Connections of a Concentric Coil Set |
| C. | first wrapping the coils and then trapping them in the grooves |
| D. | Testing the suitability of size by trapping a group of concentric coils in slots |
| Answer» E. | |
| 354. |
From the current voltage in the capacitor? |
| A. | 180॰ angle forward |
| B. | 90॰ angle lags behind |
| C. | 90॰ angle forward |
| D. | 180॰ angle lags behind |
| Answer» D. 180॰ angle lags behind | |
| 355. |
What is an insulating dielectric used in electric heaters? |
| A. | asbestos |
| B. | ceramic |
| C. | glass wool |
| D. | asbestos |
| Answer» C. glass wool | |
| 356. |
What is the break down potential of germanium? |
| A. | 0.75 eV |
| B. | 7.5 eV |
| C. | 0.6 eV |
| D. | 19.6 eV |
| Answer» B. 7.5 eV | |
| 357. |
On which meter is cos written? |
| A. | on watt meter |
| B. | on frequency meter |
| C. | on power factor meter |
| D. | suitable at all |
| Answer» D. suitable at all | |
| 358. |
In which type of washing machine the drum itself rotates to wash the loaded clothes? |
| A. | Pulsator Type |
| B. | stirrer type |
| C. | deflection jet type |
| D. | tumbler type |
| Answer» E. | |
| 359. |
If any rectifier equipment is to be used for battery charging, then the rectifier should be selected on the following basis? |
| A. | power rating |
| B. | Voltage u0026 Current Rating |
| C. | voltage rating |
| D. | ampere-hour rating |
| Answer» C. voltage rating | |
| 360. |
Transmission line regulation? |
| A. | Inductance increases as the value of the power factor of the load decreases |
| B. | The capacitance decreases when the value of the power factor of the load is reduced. |
| C. | both suitable |
| D. | none of the suitable |
| Answer» D. none of the suitable | |
| 361. |
The number of slippings in a 9-phase rotary converter is |
| A. | 9 |
| B. | 11 |
| C. | 12 |
| D. | 13 |
| Answer» B. 11 | |
| 362. |
In the transmission line, the drivers are often transferred, by doing so? |
| A. | induced in the transmission line. Forces dissipate by splitting into opposing forces |
| B. | Echoes and noises from the transmitted sound in the transmission line are reduced |
| C. | Balanced current flow in line conductors |
| D. | suitable all |
| Answer» E. | |
| 363. |
HPMV is loaded in the lamp? |
| A. | Mercury and Hydrogen |
| B. | mercury and neon |
| C. | mercury and argon |
| D. | mercury and oxygen |
| Answer» D. mercury and oxygen | |
| 364. |
What is the method to remove the stroboscopic effect in a fluorescent tube? |
| A. | use of resistance |
| B. | Use of choke |
| C. | Using Capacitor With Glow Starter |
| D. | low voltage operation |
| Answer» D. low voltage operation | |
| 365. |
What is the length of a short transmission line? |
| A. | up to 80 km |
| B. | 80km to 250km |
| C. | more than 250 km |
| D. | 250 km |
| Answer» B. 80km to 250km | |
| 366. |
What does a KVAR meter measure? |
| A. | To the frequency of the AC circuit |
| B. | Of the wattless component of the DC circuit |
| C. | Of the wattless component of the AC circuit |
| D. | To the power factor of the AC circuit |
| Answer» D. To the power factor of the AC circuit | |
| 367. |
What is the normal length of a 40 Watt fluorescent tube? |
| A. | 72 CM |
| B. | 120 CM |
| C. | 40 CM |
| D. | 15 CM |
| Answer» C. 40 CM | |
| 368. |
3 While winding the motor |
| A. | Note the type of insulated |
| B. | note the connection |
| C. | note old data |
| D. | suitable all |
| Answer» E. | |
| 369. |
What is the full name of MB type lamp? |
| A. | Mercury Booster Lamp |
| B. | Mercury Bayonet Cap Type |
| C. | mercury brake lamp |
| D. | suitable all |
| Answer» C. mercury brake lamp | |
| 370. |
What is the function of choke used in fluorescent tube? |
| A. | limit the flow |
| B. | improve power factor |
| C. | Starting the tube |
| D. | heat source |
| Answer» B. improve power factor | |
| 371. |
In the metric system the size of super enamelled copper wire is expressed as? |
| A. | resistance in ohms |
| B. | diameter in mm |
| C. | in number of drivers |
| D. | Cross-sectional area in mm2 |
| Answer» C. in number of drivers | |
| 372. |
In a transformer primary and secondary coils are coupled? |
| A. | mechanical |
| B. | Electrical |
| C. | magnetic |
| D. | none of these |
| Answer» D. none of these | |
| 373. |
Which transformer is used in the spoiler? |
| A. | current transformer |
| B. | power transformer |
| C. | distributor transformer |
| D. | auto transformer |
| Answer» E. | |
| 374. |
Digital Voltmeter (DVM) displays? |
| A. | peak to peak मान |
| B. | r.m.s (r.m.s. value |
| C. | peak value |
| D. | average value |
| Answer» E. | |
| 375. |
Is a coating winding done? |
| A. | 3ɸ in motor |
| B. | 1 in motor stator |
| C. | in armature |
| D. | suitable in all |
| Answer» D. suitable in all | |
| 376. |
Cheapest way to start a single clean motor? |
| A. | starting resistance |
| B. | inductive starting |
| C. | Capacitor starting |
| D. | none of these |
| Answer» D. none of these | |
| 377. |
Electron gun is the main part of? |
| A. | of cathode ray isoloscope |
| B. | of transistor tester |
| C. | of single generator |
| D. | all these |
| Answer» B. of transistor tester | |
| 378. |
Repulsion motor is similar to which motor in characteristics? |
| A. | slip ring motor |
| B. | range motor |
| C. | compound motor |
| D. | none of these |
| Answer» C. compound motor | |
| 379. |
Fluorescent tubes are used for tube installation. |
| A. | starter holder |
| B. | tube holder |
| C. | connector |
| D. | none of these |
| Answer» C. connector | |
| 380. |
Battery electrode? |
| A. | must be semiconductor |
| B. | must be a poor conductor of electricity |
| C. | Must be a good conductor of electricity |
| D. | none of these |
| Answer» D. none of these | |
| 381. |
What is rotor speed called? |
| A. | by pyrometer |
| B. | by tachometer |
| C. | by multimeter |
| D. | by mager |
| Answer» C. by multimeter | |
| 382. |
Metal Plate The metal used in the basket? |
| A. | copper oxide and copper |
| B. | zinc chloride and carbon |
| C. | germanium and silicon |
| D. | none of these |
| Answer» B. zinc chloride and carbon | |
| 383. |
What is an instrument to measure electric pressure? |
| A. | ampere meter |
| B. | Watt meter |
| C. | voltmeter |
| D. | power multiplier meter |
| Answer» D. power multiplier meter | |
| 384. |
A repulsion start induction run motor operates like an induction motor when |
| A. | stator connections are reversed |
| B. | Brushes shift to neutral plane |
| C. | Commutator segments get short-circuited |
| D. | A device used to short circuit |
| Answer» D. A device used to short circuit | |
| 385. |
To increase the output of the alternator will increase |
| A. | Speed |
| B. | fuel |
| C. | field excitement |
| D. | number of poles |
| Answer» C. field excitement | |
| 386. |
Suitable motor for air compressor? |
| A. | repulsion motor |
| B. | universal motor |
| C. | Capacitor-Start, Capacitor-Run Motor |
| D. | shaded pole motor |
| Answer» D. shaded pole motor | |
| 387. |
Damper winding is done? |
| A. | to increase speed |
| B. | to reduce efficiency |
| C. | for the motor to self start |
| D. | suitable all |
| Answer» D. suitable all | |
| 388. |
Synchronous motor is a very useful machine for industrial work because? |
| A. | Power multiplier unit can be done if required |
| B. | If this supply frequency is constant, then the motor runs at a constant speed on all loads. |
| C. | It improves the power factor of the entire establishment |
| D. | all of the above |
| Answer» E. | |
| 389. |
How do three phase induction motors work in general? |
| A. | At 0.8 Lead Power Factor |
| B. | at 0.8 leg power factor |
| C. | 1 (unit) |
| D. | at 0.6 leg power factor |
| Answer» C. 1 (unit) | |
| 390. |
Which motor is used for unit power factor? |
| A. | charge |
| B. | cage rotor induction motor |
| C. | slip-ring induction motor |
| D. | Hysteresis motor |
| Answer» B. cage rotor induction motor | |
| 391. |
Can the direction of the motor of a permanent capacitor be changed? |
| A. | Replacing Capacitor Wires |
| B. | replacing supply wires |
| C. | By changing the wires of the auxiliary winding |
| D. | suitable all |
| Answer» D. suitable all | |
| 392. |
Excited is that? |
| A. | which excites the stator |
| B. | which excites both rotor and stator |
| C. | that excites the rotor |
| D. | none of the suitable |
| Answer» D. none of the suitable | |
| 393. |
get neutral? |
| A. | by delta connection |
| B. | in parallel |
| C. | from star connection |
| D. | none of the suitable |
| Answer» D. none of the suitable | |
| 394. |
What is the power factor of a circuit known as? |
| A. | by power factor meter |
| B. | by ampere-meter |
| C. | by voltmeter |
| D. | by phase sequence indicator |
| Answer» B. by ampere-meter | |
| 395. |
Air gap under Interpol compared to air gap under field poles? |
| A. | less in generators and more in motors |
| B. | More in generators and less in motors |
| C. | in both generators and motors |
| D. | Both generators and motors have less |
| Answer» D. Both generators and motors have less | |
| 396. |
If back e in dc motor |
| A. | motor will burn |
| B. | motor will run at very high speed |
| C. | motor won't run |
| D. | motor will run at very slow speed |
| Answer» B. motor will run at very high speed | |
| 397. |
Should wiring be done in an industrial setting? |
| A. | PVC Casing-Capping Wiring |
| B. | conduit wiring |
| C. | cleat wiring |
| D. | batten wiring |
| Answer» C. cleat wiring | |
| 398. |
To the neutral point of the transformer? |
| A. | should be associated with meaning |
| B. | should not add to the meaning |
| C. | both wrong |
| D. | none of the suitable |
| Answer» B. should not add to the meaning | |
| 399. |
The material used for the core of a transformer operating at high frequency will be |
| A. | silicon steel |
| B. | Carbon |
| C. | ferrite |
| D. | copper |
| Answer» D. copper | |
| 400. |
On starting a series motor without load? |
| A. | bank emf decreases |
| B. | speed increases rapidly |
| C. | torque increases sharply |
| D. | The current drawn increases with intensity |
| Answer» C. torque increases sharply | |