Technical preparation

EEE MCQ

381. The HRC fuse provide best protection Against

382. The least expensive form of over current protection is provided by

383. It’s a good practice to connect ground wire for a building electrical system to a _pipe

384. A co2 fire extinguisher is specifically useful for putting out fires started by

385. Differential relays are installed to protect the equipment against

386. The letters T.P.D.T. identify a

387. Charging current in a transmission line

388. Which of the following generating station has the minimum running cost?

389. An electric motor in which rotor and stator field rotate simultaneously is called a_ motor

390. In an efficient transformer, the energy transferred from input to output

391. Power failure relays operate in most stand by power installations when the normal phase voltage falls to _ percent

392. Three phase alternator are invariably Y - connected because

393. The power factor of an alternator is determined by it’s

394. Unlike dc generator kw rating alternators are rated in

395. The pitch factor for 3rd harmonic in an alternator having 18 slots/ pole and coil span 5/6 of pole pitch is

396. Dampers in a large generator

397. A synchronous generator gives out put at the standard frequency. This frequency can be increase by

398. For turbo- alternators, the usual value of pole number is

399. Heavy duty steel works cranes which have wide load variations are equipped with_motor

400. The speed with which magnetic field of an induction motor rotates is called _ speed

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