Q1:- if the centrifugal switch of the split phase motor
fails to open
1. The motor will come to stop
2. The main winding will get overheated
3. The auxiliary winding will get overheated
4. None
ANSWER:-3
Q2:- what type of construction is used for most stator poles
of a shaded pole motor?
1.Sailent pole
2.Alternate pole
3.Compensated pole
4.Consequent pole
ANSWER:-1
Q3:- what motor is ideal for application where start/stop
timing is required because of this quick starting and stopping action
1.
I.M.
2.
Shaded pole motor
3.
Hysteresis motor
4.
Reluctance motor
ANSWER:-1
Q4:- the speed of I.M. depends on line frequency and the
1.
Stator pole
2.
Number of rotor teeth
3.
Rotor slip
4.
Shaded poles position
ANSWER:-2
Q5:- the magnetic flux in the shaded part of the stator pole
1.
Aids the main pole
2.
Leads the main pole magnetic flux
3.
Lags the main pole magnetic flux
4.
Is in phase with the main pole magnetic flux
ANSWER:-3
Q6:-shaded pole type motor is not generally
used because it has
1.
Poor starting torque
2.
Poor pf
3.
D.O.R. can not be easily reversed
4.
All
ANSWER:-4
Q7:- the insulating materials used
for motor windings are classified according to the
1. Motor horsepower rating
2.Levels of temperature rise
3.Overcurrent protection avilabe
4.Controller size
ANSWER:-2
Q8:- when selecting a motor which
of the following must be considered
1.
Voltage and horsepower
2.
Speed and frame enclosure size
3.
Bearing and motor protectors
4.
All
ANSWER:-4
Q9:- a loss in the capacitance of a
capacitor start
motor results in reduced
1.
Speed
2.
Voltmeter
3.
Armature reaction
4.
Starting torque
ANSWER:- 4
Q10:- The % impedance of two transformer working in parallel are different then
1. transformer will be overheated
2. pf of both of the transformer will be same
3.parallel operation will not be possible
4. parallel operation will still be possible
ANSWER:-3
Q10:- The % impedance of two transformer working in parallel are different then
1. transformer will be overheated
2. pf of both of the transformer will be same
3.parallel operation will not be possible
4. parallel operation will still be possible
ANSWER:-3
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