a) “CONT†on a motor nameplate indicates that the motor can putout _____________ power continuously.
b) ______________ DC motors have electronic commutators.
c) Stepper motors are used when precise, repeatable shaft_____________ is required.
d) Single-phase induction motors usually have a(n)______________ winding for starting the motor.
e) Which one of these cannot be a synchronous speed? (3600,2400, 1800, 1200, 600) rpm
f) There are five kinds of power losses in AC motors. Namethem:
           1. _________________________
           2. _________________________
           3. _________________________
           4. _________________________
           5. _________________________
g) If the starting torque of the load is greater than thestarting torque of the motor, the motor will ____________.
h) Most motors can supply several times their rated power forshort periods of time. Ultimately, the motor_________________________ limits the power output.
i) Three-phase synchronous motors have ______________________starting torque.
j) If an induction motor has no _______________________, itsspeed will approach the synchronous speed.
k) If the field is reduced on an unloaded shunt-connected motor,the motor will
(speed up, slow down, remain at the same speed).
l) A wheel on a vehicle has a diameter of 750 cm and rotates at200 rpm. The speed of the vehicle is ____________ m/s.
m) Typical industrial motor efficiency is 85-95% at_______________ load.
n) A crank handle is 50 cm long. You push down on the crankhandle with a force of 15 N. The torque on the crank is______________ N-m.
o) Back EMF opposes the applied ________________.
p) A permanent magnet motor has the same torque-speed curve asa(n) ______________ motor.
q) What kind of motor is sometimes used without a load for powerfactor correction? _______________ motor.
r) What kind of motor runs at a constant speed regardless of theload? _________________motor.
s) The armature winding is on the (rotor, stator, either rotoror stator).
t) What do you call the part of a motor that rotates?______________
u) The most common motor in the world is an induction motor witha ______________ rotor.
v) What do you call the part of a motor that does not rotate?____________________
w) Motor brushes are usually made out of what material?______________
x) What do you call a motor that can run on both AC and DC?___________________________
y) EMF stands for _____________________________
z) Back EMF is proportional to the field strength and the______________ of rotation.
