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