Technical preparation

EEE MCQ

401. One of the characteristics of a single- phase motor is that It

402. The starting winding of a single - phase motor is placed in

403. The rotating part of a single - phase motor is called

404. If supply voltage in the above case is 110v, the voltage rating of the capacitor should be _ volt

405. A 4 - pole induction motor is fed from a 50 hz source and is running at a slip of 4%. The speed of the motor is _ rpm

406. Out of the following methods of starting a 3-phase induction motor, which one requires six stator terminals?

407. Under no- load conditions power factor of an induction motor is about

408. If maximum torque of an induction motor is 200 kg-m at a slip of 12%, the torque at 6% slip would be _ kg-m

409. If full load speed of a 6-pole, 50 hz SCTM is 960 rpm, it’s speed at half - load is _ rpm

410. When line voltage of an induction motor is reduced to 75% of its rated value, it’s starting current is reduced by _ percent

411. The magnetising current drawn by transformers and induction motors is the cause of their _ power factor

412. The no-load speed of a 3- phase, 4- pole induction motor connected to a 3-phase, 50-hz supply is expected to be _ rpm

413. While conducting short-circuit test on a transformer the following side is short-circuit

414. Two transformer operating in parallel will share the load depending upon their

415. A transformer has negative voltage Regulation when it’s load power factor is

416. The commercial efficiency of a transformer while on open- circuit is

417. No- load test on a transformer is carried out to determine

418. A step-up transformer increeases

419. A transformer transforms

420. What is the name given to the sequence of steps which a computer follows?

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