Electrical Engineering MCQs

Page No. 43

Which part of a motor needs maximum attention for maintenance ?


aFrame

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bRearing

✓


cStator winding

✖


dRotor winding

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View Answer Rearing

Which feature, while selecting a.motor for centrifugal pump, will be of least significance ?


aStarting characteristics

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bOperating speed

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cHorse power

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dSpeed control

✓


View Answer Speed control

Ward-Leonard controlled D.C. drives are generally used for _____________________ excavators?


aLight duty

✖


bMedium duty

✖


cHeavy duty

✓


dAll of the above

✖


View Answer Heavy duty

For a particular application the type of electric-and control gear are determined by which of the following considerations ?


a Starting torque

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bConditions of environment

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cSpeed control range and its nature

✖


dAll of the above

✓


View Answer All of the above

The load cycle for a motor driving a power press will be________________?


avariable load

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bcontinuous

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ccontinuous but periodical

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dintermittent and variable load

✓



Which of the following motors always starts on load ?


aConveyor motor

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bFloor mill motor

✖


cFan motor

✖


dAll of the above

✓


View Answer All of the above

While selecting an electric motor for a floor mill, which electrical characteristics will be of least significance ?


aRunning characteristics

✖


bStarting characteristics

✖


cEfficiency

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dBraking

✓


View Answer Braking

The selection of an electric motor for any application depends on which of the following factors ?


aElectrical characteristics

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bMechanical characteristics

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cCost

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dAll of the above

✓


View Answer All of the above

Which of the following motors is preferred for traction work ?


aUniversal motor

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b D.C. series motor

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cSynchronous motor

✓


dThree-phase induction motor

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View Answer Synchronous motor

________________is preferred for automatic drives?


aSquirrel cage induction motor

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bSynchronous motors

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cWard-Leonard controlled D.C. motors

✓


dAny of the above

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