1-what is the best choice of a single phase motor forcompressor?
a) a shaded pole motor
b) a split phase motor
c) a capacitor start induction motor
d) a capacitor run induction motor
e) a permanent split capacitor motor
2- Stepper motors typically operate with:
a) A single phase
b) Three phases (X,Y and Z)
c) 4 phases
d) 2 phases ( A and B)
e) The number of phases varies with the motor design
3- A 200 step stepper motor:
a) Has 200 poles
b) Has 100 poles on 2 phases
c) Has 4 poles on each of 2 phases
d) is not commercially available
e) is too complex to manufacture
4- When a stepper motor moves from one step to another:
a) The motor may overshoot
b) There is no possibility of overshoot
c) The overshoot will not exceed 1/2 step
d) A and C but not B
e) All of the above
5- The controller in an industrial servo motor system:
a) Is universal, any controller will work with any motor
b) Is always sold with the motor
c) Must be match to the motor according to manufacturer'srecommendation
d) A and B
e) B and C
6- Industrial servo motor:
a) are not capable of holding a fixed position
b) have a holding torque that hold a fixed position with nomovement
c) hold a fixed position by making small corrections as the loadmoves, resulting in small oscillations
d) are better than a stepper motor of holding a fixedposition
e) do not have enough torque that hold fixed positions with nomovement
7-Limit switches can be used:
a) with stepper or servo systems
b) can be used to prevent machine over travel
c) can be used to automatically set the 0 point for a motorcontroller
d) B and C
e) A, B and C
8- Stepper motors of the same faceplate sizebut longerlength:
a) offer no difference in performance
b) generally run at higher speed
c) are generally capabe of producing more torque
d) generally run at lower speed
e) generally run at longer period of time
9- For an intermittent load, such as a manual lathe, which methodshould be used to size the motor:
a) The motor’s nominal size should match the minimum load
b) The motor’s nominal size should match the RMS horsepowercalculated based on the anticipated loads
c) The motor’s nominal size should match the maximum anticipatedload
d) Any available motor can be used, the operator will adapt theirwork methods
10- A motor is running at 90% of its nameplate voltage. Comparedto running under the same condition at 100% of name plate voltageyou expect the temperature to:
a) Increase
b) Decrease
c) Remain the same
11- A motor is running at 90% of its nameplate voltage. Comparedto running under the same condition at 100% of name plate voltageyou expect the current to:
a) Increase
b) Decrease
c) Remain the same
12- A motor is running at 90% of its nameplate voltage. Comparedto running under the same condition at 100% of name plate voltageyou expect the speed to:
a) Increase
b) Decrease
c) Remain the same
13- A motor is running at 110% of its nameplate voltage.Compared to running under the same condition at 100% of name platevoltage you expect the starting torque to:
a) Increase
b) Decrease
c) Remain the same
14- Motors with the same NEMA frame size are:
a) Electrically interchangeable (identical voltage and currentratings)
b) Mechanically interchangeable (same mounting hole locations andshaft size)
c) Mechanically interchangeable (same speed and horsepowerrating)
d) Both electrically and mechanically interchangeable
e) The same colour
15- Which is not a component of a DC motor:
a) Field Winding
b) Squirrel Cage Rotor
c) Armature winding
d) Brushes
e) Commutator
16- In a permanent magnet DC motor the magnets take the place ofthe:
a) field Winding
b) Armature Winding
c) Bearings
17- If the field coil of a DC shunt motor is opened, thearmature speed will __________.
a) increase
b) decrease
c) stay the same
d) runaway
e) stop
18- The __________ DC motor has the highest startingtorque.
a)series
b)shunt
c) additive compound
d) subtractive compound
e) long shunt
19- Which of the following factors determine the synchronousspeed of an AC motor?
a) inductance of the rotor windings
b)the frequency of the applied voltage
c) the number of field poles per phase
d) the physical load driven by the motor
e) both b and c
20- Which of the following inductance motors use a centrifugalswitch?
a) resistance-start, induction-run
b) capacitive-start, induction run
c) shaded pole
d) a and b
e) b and c
