In a shaded pole motor, the direction of rotation is from Shaded pole to main pole Depends on supply line polarity None of the listed here Main poles to shaded pole TRUE ANSWER : ? YOUR ANSWER : ?
Hysteresis motor is particularly useful for high-quality record players and tape-recorders because it revolves synchronously it is not subject to any magnetic or mechanical vibrations it can be easily manufactured in extremely small sizes of up to 1 W output it develops hysteresis torque which is extremely steady both in amplitude and phase TRUE ANSWER : ? YOUR ANSWER : ?
In a hysteresis motor, the rotor must have Retentivity Susceptibility None of the listed here Resistivity TRUE ANSWER : ? YOUR ANSWER : ?
Burning out of winding is due to capacitor value hiving changed open circuiting of capacitor short circuited capacitor None of these TRUE ANSWER : ? YOUR ANSWER : ?
In a split phase induction motor, the two stator windings Draw only the in phase currents Are mutually displaced by 90° electrical Have equal R/XL ratio Draw equal current TRUE ANSWER : ? YOUR ANSWER : ?
Which motor will make least noise? Universal motor Shaded pole motor Hysteresis motor Capacitor motor TRUE ANSWER : ? YOUR ANSWER : ?
If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then electrolytic capacitor will, in all probability, suffer break down motor will not come up to speed motor will not carry the load current drawn by the motor will be excessively high TRUE ANSWER : ? YOUR ANSWER : ?
For the same rating, the efficiency of a single phase induction motor is _______ that of 3-phase induction motor. Less than None of the listed here More than The same as TRUE ANSWER : ? YOUR ANSWER : ?
The resistance split phase induction motor has ______ starting torque . Very low High None of the listed here Moderate TRUE ANSWER : ? YOUR ANSWER : ?
The purpose of starting winding in a single phase induction motor is to _____ Reduce losses Limit temperature rise of the machine Produce rotating flux in conjunction with main winding None of the listed here TRUE ANSWER : ? YOUR ANSWER : ?