Single phase induction motors Archives - Page 5 of 10 - MCQ and Quiz for Exams

41. A shaded pole motor does not possess

centrifugal switch

capacitor

commutator

all of the above

Detailed SolutionA shaded pole motor does not possess

42. Locked rotor current of a shaded pole motor is

equal to full load current

less than full load current

slightly more than full load current

several times the full load current

Detailed SolutionLocked rotor current of a shaded pole motor is

43. The speed of a universal motor is generally reduced by using

gear trains

V-belts

brakes

chains

Detailed SolutionThe speed of a universal motor is generally reduced by using

44. Most of the fractional horsepower motors have either

hard and annealed bearings

ball or roller bearings

soft and porous bearings

plain or sleeve bearings

Detailed SolutionMost of the fractional horsepower motors have either

45. The speed/load characteristics of a universal motor is same as that of

D.C. motor

D.

motor B.

none of the above

Detailed SolutionThe speed/load characteristics of a universal motor is same as that of

46. If a single phase induction motor runs slower than normal, the most likely defect is

worn bearings

short-circuit in the winding

open-circuit in the winding

none of the above

Detailed SolutionIf a single phase induction motor runs slower than normal, the most likely defect is

47. In split phase motor main winding is of

thin wire placed at the top of the slots

thin wire placed at the bottom of the slots

thick wire placed at the bottom of the slots

thick wire placed at the top of the? slots

Detailed SolutionIn split phase motor main winding is of

48. A shaded pole motor can be used for

toys

hair dryers

circulators

any of the above

Detailed SolutionA shaded pole motor can be used for

49. The repulsion start induction run motor is used because of

good power factor

high efficiency

minimum cost

high starting torque

Detailed SolutionThe repulsion start induction run motor is used because of

50. Which of the following motors is used in a situation where load increases with speed ?

Induction motor

Three-phase series motor

Schrage motor

Hysteresis motor

Detailed SolutionWhich of the following motors is used in a situation where load increases with speed ?

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