MCQOPTIONS
Saved Bookmarks
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.
| 251. |
What will be the current drawn by a 200W electric bulb from a 200V, 50Hz source? |
| A. | 10A |
| B. | 200/220A |
| C. | 1.1A |
| D. | 1A |
| Answer» E. | |
| 252. |
If the flux of a dc motor becomes almost zero, then the speed? |
| A. | The rated speed will be approximately equal to |
| B. | will be eternal |
| C. | will be zero |
| D. | none of the suitable |
| Answer» C. will be zero | |
| 253. |
What are the properties of mica capacitor? |
| A. | AC losses are less |
| B. | It has high insulation resistance |
| C. | power factor is fine |
| D. | All of the above |
| Answer» B. It has high insulation resistance | |
| 254. |
Screws of terminals are made to tighten the conductor in switch, holder, socket? |
| A. | by copper |
| B. | by silver metal |
| C. | by aluminum metal |
| D. | by brass alloy |
| Answer» E. | |
| 255. |
To what temperature can nichrome be used safely? |
| A. | 1450॰C |
| B. | 1650॰C |
| C. | 1600॰C |
| D. | 2000॰C |
| Answer» B. 1650॰C | |
| 256. |
In Rotary Converter Is your company? |
| A. | One side has slippering and the other side has commutator |
| B. | is a computer |
| C. | Slipping occurs |
| D. | suitable all |
| Answer» B. is a computer | |
| 257. |
Metal The Takari? |
| A. | operates at low temperatures |
| B. | can operate at high voltage |
| C. | Can work at higher capacity loads |
| D. | their regulation is not good |
| Answer» B. can operate at high voltage | |
| 258. |
Which of the following D |
| A. | Arsonval Galvanometer |
| B. | vibration galvanometer |
| C. | moving iron voltmeter |
| D. | none of the suitable |
| Answer» C. moving iron voltmeter | |
| 259. |
Transistor N |
| A. | base current |
| B. | base voltage |
| C. | collector voltage (collector potential |
| D. | emitter-bias voltage |
| Answer» D. emitter-bias voltage | |
| 260. |
Are the atoms in semiconductors bonded to each other? |
| A. | by metallic bond |
| B. | By covalent bond |
| C. | by ionic bond |
| D. | none in suitable |
| Answer» C. by ionic bond | |
| 261. |
The collector is often not used in transistors? |
| A. | is placed at zero bias |
| B. | reverse bias is done |
| C. | forward bias is done |
| D. | is grounded |
| Answer» C. forward bias is done | |
| 262. |
Transistor in Transistor Type Inverters? |
| A. | DC. increase the |
| B. | AC let's rectify |
| C. | Pulsating DC make up |
| D. | none of the suitable |
| Answer» D. none of the suitable | |
| 263. |
If the same power is transmitted by copper conductor line and aluminum conductor line, then? |
| A. | The number of drivers in the aluminum line will be more |
| B. | The volume of aluminum line will be more |
| C. | The aluminum line will have a higher load |
| D. | suitable all |
| Answer» E. | |
| 264. |
Lumen is the unit? |
| A. | of lamp |
| B. | of candle |
| C. | Illumination beam |
| D. | all of the above |
| Answer» D. all of the above | |
| 265. |
What is the approved method for checking 'short circuit' between the coils of a coil in armature winding? |
| A. | voltage drop method |
| B. | test lamp method |
| C. | ohm meter method |
| D. | Wheatstone Bridge Method |
| Answer» B. test lamp method | |
| 266. |
If the slots of the armature are to be insulated, which material will be used? |
| A. | leatherite paper |
| B. | Empire Cloth |
| C. | PVC paper |
| D. | all of the above |
| Answer» E. | |
| 267. |
At night, the fluorescent tube gives light even after closing the switch, which is the reason? |
| A. | getting its phase through leakage |
| B. | Phase access directly into the tube |
| C. | Phase not controlled by switch |
| D. | suitable all |
| Answer» D. suitable all | |
| 268. |
of transmission line |
| A. | different resistivity of the conductors |
| B. | rules of OM |
| C. | skin effects |
| D. | suitable all |
| Answer» D. suitable all | |
| 269. |
The chain efficiency does not depend on which of the following factors? |
| A. | spark voltage of a disc |
| B. | total number of discs |
| C. | spark voltage on string |
| D. | transmission line voltage |
| Answer» E. | |
| 270. |
What are the three types of grooves made in armature cores? |
| A. | Square, square, triangular |
| B. | Open, closed, semi-closed |
| C. | Open, closed, semi-open |
| D. | none of these |
| Answer» C. Open, closed, semi-open | |
| 271. |
Thermal runway is related to which device? |
| A. | Diodes and Transistors |
| B. | Transistor only |
| C. | diode only |
| D. | Pentode |
| Answer» B. Transistor only | |
| 272. |
An important property of the element used in resistance heating is |
| A. | high coefficient |
| B. | high resistivity |
| C. | Low Resistance Heating Coefficient |
| D. | all these |
| Answer» E. | |
| 273. |
The nichrome element is wrapped in an electric press? |
| A. | with mica |
| B. | with backlight |
| C. | with ebonite |
| D. | all these |
| Answer» B. with backlight | |
| 274. |
Which material is not suitable for heating element? |
| A. | Nickel |
| B. | Chromium |
| C. | copper |
| D. | iron |
| Answer» D. iron | |
| 275. |
Do moving iron machines work in nature? |
| A. | electrostatic effect |
| B. | Electromagnetic effect |
| C. | chemical effect |
| D. | thermal effect |
| Answer» C. chemical effect | |
| 276. |
What is the amplification coefficient of the pentode? |
| A. | is high |
| B. | happens below |
| C. | is infinite |
| D. | is zero |
| Answer» B. happens below | |
| 277. |
Which loss in a synchronous motor does not change with load? |
| A. | copper losses |
| B. | Hysteresis losses |
| C. | air friction losses |
| D. | all these |
| Answer» D. all these | |
| 278. |
The number of poles in the rotor winding in a three fail slippering induction motor? |
| A. | does not depend on the number of stator poles |
| B. | The number of stator poles is greater than |
| C. | The number of stator poles is equal to |
| D. | The number of stator poles is less than |
| Answer» D. The number of stator poles is less than | |
| 279. |
In wave and lap winding the surface pitch is equal? |
| A. | kundali pitch |
| B. | average pitch |
| C. | diversion pitch |
| D. | result pitch |
| Answer» B. average pitch | |
| 280. |
If the speed of the induction motor is synchronous, then the relative speed between the rotating flux and the rotor is |
| A. | will be zero, so torque will be maximum |
| B. | will be maximum, hence torque will be zero |
| C. | will be maximum, so torque will be maximum |
| D. | will be zero, so torque will be zero |
| Answer» E. | |
| 281. |
A machine that runs on steam turbines is called? |
| A. | hydro generator |
| B. | Turbo alternator |
| C. | gaseous alternator |
| D. | all these |
| Answer» C. gaseous alternator | |
| 282. |
In which of the following situations synchronous motor must be used? |
| A. | For large size 3-phase generators |
| B. | for crane |
| C. | for electric train |
| D. | for machine tools |
| Answer» B. for crane | |
| 283. |
Synchronous motor in general? |
| A. | cylindrical rotor is |
| B. | Salient pole rotor is |
| C. | both 1 and 2 above |
| D. | none of the suitable |
| Answer» C. both 1 and 2 above | |
| 284. |
If the synchronous motor is operated at zero load and has negligible losses, then |
| A. | stator current will be too low |
| B. | stator current will be high |
| C. | stator current will be zero |
| D. | The opposing inverse force will be greater than the supply voltage |
| Answer» D. The opposing inverse force will be greater than the supply voltage | |
| 285. |
Use of induction regulator? |
| A. | used to generate ac voltage |
| B. | Induction motor is used to rotate |
| C. | used to regulate line voltage |
| D. | none of the suitable |
| Answer» D. none of the suitable | |
| 286. |
Capacitor is used in capacitor start motor? |
| A. | mica |
| B. | electrolyzing |
| C. | Selenium |
| D. | Paper |
| Answer» E. | |
| 287. |
What is formed between the stator pole and the rotor pole? |
| A. | phase angle |
| B. | Retention angle |
| C. | Cosine angle |
| D. | suitable all |
| Answer» C. Cosine angle | |
| 288. |
induced in the stator of a synchronous motor |
| A. | Supply voltage can be exceeded |
| B. | supply voltage is less than |
| C. | equal to the supply voltage |
| D. | Supply voltage can be increased or decreased |
| Answer» E. | |
| 289. |
What would be the most suitable metal for a bush for a 230V generator? |
| A. | electrographite |
| B. | Carbon |
| C. | copper |
| D. | graphite alloyed copper |
| Answer» B. Carbon | |
| 290. |
A manufacturer produces output from his generator. |
| A. | by used starter |
| B. | by commutator |
| C. | By the insoluble substance used in the machine |
| D. | by Bush's substance |
| Answer» C. By the insoluble substance used in the machine | |
| 291. |
The speed of which of the following motors is almost constant? |
| A. | Cumulative compound motor |
| B. | Category Matter |
| C. | shunt motor |
| D. | suitable all |
| Answer» D. suitable all | |
| 292. |
Which type of motor would you choose for the operation of a transport vehicle? |
| A. | excited motor |
| B. | DC Shunt Motor |
| C. | DC Series Motor |
| D. | DC Differential Alloy Motor |
| Answer» D. DC Differential Alloy Motor | |
| 293. |
Which motor is suitable for irregular and high torque loads? |
| A. | Dc Cumulative compound motor |
| B. | DC. shunt motor |
| C. | DC. range motor |
| D. | Dc Differential compound motor |
| Answer» B. DC. shunt motor | |
| 294. |
The frequency of a signal is 1000Hz. Is this a signal? |
| A. | High frequency signal |
| B. | Radio frequency signal |
| C. | audio frequency signal |
| D. | Ultra Frequency Signal |
| Answer» D. Ultra Frequency Signal | |
| 295. |
A diverter is used in a series generator. If the switch of the diverter is opened while supplying normal current, then? |
| A. | terminal voltage will remain unchanged |
| B. | terminal voltage will drop |
| C. | terminal voltage will increase |
| D. | none of the above |
| Answer» D. none of the above | |
| 296. |
The maximum power developed in a synchronous motor depends on |
| A. | at both rotor excitation and supply voltage |
| B. | on rotor excitation only |
| C. | at supply voltage only |
| D. | At maximum value of load angle, rotor excitation and supply voltage |
| Answer» E. | |
| 297. |
What is Daniel Cell Amalgamation? |
| A. | silver plate on copper plate |
| B. | Nickel is coated on a zinc rod |
| C. | a layer of mercury is applied to a zinc rod |
| D. | suitable all |
| Answer» D. suitable all | |
| 298. |
What is the correct height to fit the switch board? |
| A. | 2 meters |
| B. | 1.5 meters |
| C. | 5 meters |
| D. | 2.8 m |
| Answer» C. 5 meters | |
| 299. |
Which of the following should be the property of a material to make a magnet by alternating current? |
| A. | More area of the hysteresis loop |
| B. | high demagnetization and low density |
| C. | High holding capacity and high demagnetization |
| D. | High magnetism and low hysteresis loss |
| Answer» E. | |
| 300. |
What is the total load of a light circuit? |
| A. | not exceed 1000 watts |
| B. | not exceed 1500 watts |
| C. | not exceed 1200 watts |
| D. | not exceed 800 watts |
| Answer» E. | |