13691757
Question 1
Question
What is the name of the transformer with one common winding?
Answer
-
Autotransformer
-
Step-down transformer
-
Current transformer
-
Step-up transformer
Question 2
Question
The output of electrical motor is:
Answer
-
Magnetic
-
Mechanical
-
chemical
-
light
Question 3
Question
Which of the following is used to check the heat element's continuity?
Answer
-
ohmmeter
-
Voltmeter
-
Ammeter
-
Tachometer
Question 4
Question
In a DC motor, what is the relationship between power power fietoa
Answer
-
Inversely proportional
-
Equal
-
None
-
Directly proportional
Question 5
Question
Which translates loss is due to resistances of the primary and secondary coil?
Answer
-
Copper losses
-
Stray losses
-
Iron losses
-
Mechanical losses
Question 6
Question
The motor without a centrifugal switch is
Answer
-
Capacitor start motor
-
Capacitor run motor
-
Capacitor start capacitor run motor
-
Split phase motor
Question 7
Question
In an AC motor, what is the relationship between power and power factor
Answer
-
None
-
Inversely proportional
-
Equal
-
Directly proportional
Question 8
Question
which of the following motors has no auxiliary winding?
Answer
-
Capacitor run motor
-
Capacitor start motor
-
Split phase motor
-
Repulsion motor
Question 9
Question
The brushes are made of
Answer
-
Copper
-
Carbon
-
Steel
-
Aluminim
Question 10
Question
The transformer winding insulated by:
Answer
-
Varnish
-
Wood
-
Plastic
-
Carbon
Question 11
Question
What material is used in the magnetic core of the transformer?
Answer
-
Copper
-
Varnish
-
Steel
-
Wood
Question 12
Question
Which of the following electrical parameters is not considered in DC motors?
Answer
-
Voltage
-
Power
-
Power factor
-
Current
Question 13
Question
Which of the following is not a method to control the speed of a DC motor?
Answer
-
Flux control method
-
Armature control method
-
Multiple voltage control
-
Winding turns control
Question 14
Question
Which of the following instruments in not used in electrica testing of a transformer?
Answer
-
Multi-meter
-
Tachometer
-
Voltmeter
-
Insulation tester
Question 15
Question
What DC motor is shown below?
Answer
-
Sepately excited
-
Long compound
-
Shunt
-
Series
Question 16
Question
What is the unit of torque, T?
Answer
-
Hertz
-
Watts
-
Newton-meter
-
Revolutions per minurt e
Question 17
Question
The losses due to the winding resistances in electrical machines is also known as:
Answer
-
Hysteresis
-
Eddy current loss
-
Friction loss
-
Copper loss
Question 18
Question
At what percent of the rated speed does the dentrifugal switch disconn e auxiliary winding?
Answer
-
15%
-
100%
-
75%
-
50%
Question 19
Question
Which of the following is not a type of DC motor?
Answer
-
Permanent magnet
-
Separately excited
-
Capacitor start
-
start
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