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Perguntas do quiz (19)
1What is the name of the transformer with one common winding?
- AAutotransformer
- BStep-down transformer
- CCurrent transformer
- DStep-up transformer
2The output of electrical motor is:
- AMagnetic
- BMechanical
- Cchemical
- Dlight
3Which of the following is used to check the heat element's continuity?
- Aohmmeter
- BVoltmeter
- CAmmeter
- DTachometer
4In a DC motor, what is the relationship between power power fietoa
- AInversely proportional
- BEqual
- CNone
- DDirectly proportional
5Which translates loss is due to resistances of the primary and secondary coil?
- ACopper losses
- BStray losses
- CIron losses
- DMechanical losses
6The motor without a centrifugal switch is
- ACapacitor start motor
- BCapacitor run motor
- CCapacitor start capacitor run motor
- DSplit phase motor
7In an AC motor, what is the relationship between power and power factor
- ANone
- BInversely proportional
- CEqual
- DDirectly proportional
8which of the following motors has no auxiliary winding?
- ACapacitor run motor
- BCapacitor start motor
- CSplit phase motor
- DRepulsion motor
9The brushes are made of
- ACopper
- BCarbon
- CSteel
- DAluminim
10The transformer winding insulated by:
- AVarnish
- BWood
- CPlastic
- DCarbon
11What material is used in the magnetic core of the transformer?
- ACopper
- BVarnish
- CSteel
- DWood
12Which of the following electrical parameters is not considered in DC motors?
- AVoltage
- BPower
- CPower factor
- DCurrent
13Which of the following is not a method to control the speed of a DC motor?
- AFlux control method
- BArmature control method
- CMultiple voltage control
- DWinding turns control
14Which of the following instruments in not used in electrica testing of a transformer?
- AMulti-meter
- BTachometer
- CVoltmeter
- DInsulation tester
15What DC motor is shown below?
- ASepately excited
- BLong compound
- CShunt
- DSeries
16What is the unit of torque, T?
- AHertz
- BWatts
- CNewton-meter
- DRevolutions per minurt e
17The losses due to the winding resistances in electrical machines is also known as:
- AHysteresis
- BEddy current loss
- CFriction loss
- DCopper loss
18At what percent of the rated speed does the dentrifugal switch disconn e auxiliary winding?
- A15%
- B100%
- C75%
- D50%
19Which of the following is not a type of DC motor?
- APermanent magnet
- BSeparately excited
- CCapacitor start
- Dstart
Informações
- Descrição
- H
- Autor
- Hussain H
- Idioma
- English
- Visualizações
- 25
- Etiquetas
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