Industrial drives objective questions with explanations

Industrial drives objective questions with explanations

Q no 1 . Which of the following motors always starts on load ?

A )conveyor motor

B ) floor mill motor

C ) fan motor

D ) all of the above

Explanations

                   Answer D ) all of the above

Q no 2 . When the load is above ……. A synchronous motor is found to be more economical ?

A ) 2 kw

B ) 20 kw

C ) 50 kw

D ) 100 kw

Explanations

                   Answer D ) 100 kw

Q no 3 . The load cycle for a motor driving a power press will be …..

A ) variable load

B ) continuous

C ) continuous but periodical

D ) intermittent and variable load

Explanations

                   Answer D ) intermittent and variable load

Q no 4 . ……….. is preferred for synthetic fibre mills .

A ) synchronous motor

B ) reluctance motor

C ) series motor

D ) shunt motor

Explanations

                   Answer B ) reluctance motor

Q no 5 . ward – leonard controlled d.c.drives are generally used for …………excavators.

A ) light duty

B ) medium duty

C ) heavy duty

D ) all of the above

Explanations

                   Answer C ) heavy duty

Q no 6 . Which of the following motors is used for elevators ?

A ) induction motor

B ) synchronous motor

C ) capacitor start single phase motor

D ) any of the above

Explanations

                   Answer A ) induction motor