Single Phase Motors The full load efficiency of a shaded pole motor is about _______ 70 to 80% 5 to 10% 30 to 35% 60 to 70% 70 to 80% 5 to 10% 30 to 35% 60 to 70% ANSWER DOWNLOAD EXAMIANS APP
Single Phase Motors If the capacitor of a single-phase motor is short-circuited the motor will run in the same direction at reduced r.p.m. the motor will run in reverse direction the motor will not start the motor will run the motor will run in the same direction at reduced r.p.m. the motor will run in reverse direction the motor will not start the motor will run ANSWER DOWNLOAD EXAMIANS APP
Single Phase Motors Which of the following statements regarding a reluctance motor is incorrect ? Its squirrel cage-rotor is of unsym-metrical magnetic construction in order to vary reluc-tance path between stator and rotor It requires no D.C. field excitation for its operation It cannot be reversed, ordinarily It is nothing else but a single-phase, salient pole synchronous-induction motor Its squirrel cage-rotor is of unsym-metrical magnetic construction in order to vary reluc-tance path between stator and rotor It requires no D.C. field excitation for its operation It cannot be reversed, ordinarily It is nothing else but a single-phase, salient pole synchronous-induction motor ANSWER DOWNLOAD EXAMIANS APP
Single Phase Motors In case of a reluctance motor, when the load is increased so that it cannot maintain synchronous speed the motor will Become unstable Fall out of synchronism and come to stand still Run as induction motor Draw excessive armature current and may burn out Become unstable Fall out of synchronism and come to stand still Run as induction motor Draw excessive armature current and may burn out ANSWER DOWNLOAD EXAMIANS APP
Single Phase Motors Centrifugal switch disconnects the auxiliary winding of the motor at about ____ percent of synchronous speed 100 30 to 40 70 to 80 80 to 90 100 30 to 40 70 to 80 80 to 90 ANSWER DOWNLOAD EXAMIANS APP
Single Phase Motors Most of the fractional horsepower motors have either ball or roller bearings hard and annealed bearings plain or sleeve bearings soft and porous bearings ball or roller bearings hard and annealed bearings plain or sleeve bearings soft and porous bearings ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS