H

Hussain H
Quiz by Hussain H, updated more than 1 year ago
Hussain H
Created by Hussain H about 3 years ago
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H

Resource summary

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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