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Single phase induction motors
| 1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
| 2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
| Q1 ⇒ In a single phase motor the centrifugal
switch disconnects auxiliary winding of the motor [other wrong options] [Discuss in forum] |
| Q2 ⇒ The range of efficiency for shaded pole
motors is 5% to 35% [other wrong options] [Discuss in forum] |
| Q3 ⇒ A single-phase induction motor is inherently non-self-starting with low torque [other wrong options] [Discuss in forum] |
| Q4 ⇒ In A.C. series motor compensating
winding is employed to reduce sparking at the brushes [other wrong options] [Discuss in forum] |
| Q5 ⇒ Which type of load is offered by cranes
and hoists? Reversing, heavy start [other wrong options] [Discuss in forum] |
| Q6 ⇒ In a hysteresis motor, the rotor must
have retentivity [other wrong options] [Discuss in forum] |
| Q7 ⇒ Speed torque characteristic of a repulsion
induction motor is similar to that
of a D.C. compound motor [other wrong options] [Discuss in forum] |
| Q8 ⇒ In repulsion motor, zero torque is
developed when both (b) and (c) [other wrong options] [Discuss in forum] |
| Q9 ⇒ If starting winding of a single-phase
induction motor is left in the circuit, it
will draw excessive current and overheat [other wrong options] [Discuss in forum] |
| Q10 ⇒ A universal motor is one which can be operated either on D.C. or A.C. supply at approximately the same speed and output [other wrong options] [Discuss in forum] |
| Q11 ⇒ A.C. series motor as compared to D.C.
series motor has all of the above [other wrong options] [Discuss in forum] |
| Q12 ⇒ Which of the following motors would
you select for vacuum cleaners ? Universal motor [other wrong options] [Discuss in forum] |
| Q13 ⇒ In a shaded pole motor, the direction of
rotation is from main pole to shaded pole [other wrong options] [Discuss in forum] |
| Q14 ⇒ Which of the following motors is
generally used in toys ? Shaded-pole motor [other wrong options] [Discuss in forum] |
| Q15 ⇒ A capacitor selected for capacitor-run
motor should be rated for peak voltage [other wrong options] [Discuss in forum] |
| Q16 ⇒ A repulsion-start induction-run singlephase
motor runs as induction motor
only when commutator seg,ments are shortcircuited [other wrong options] [Discuss in forum] |
| Q17 ⇒ Which of the following motor will give
relatively high starting torque ? Capacitor start motor [other wrong options] [Discuss in forum] |
| Q18 ⇒ The running winding of a single phase
motor on testing with meggar is found
to be ground. Most probable location of
the ground will be at the slot edge where coil enters or comes out of the slot [other wrong options] [Discuss in forum] |
| Q19 ⇒ In a capacitor start single-phase motor,
when capacitor is replaced by a resistance motor will continue to run in same direction [other wrong options] [Discuss in forum] |
| Q20 ⇒ A schrage motor can run on all of the above [other wrong options] [Discuss in forum] |
| Or |