Electrical Engineering Mcqs

Which of the following losses in a synchronous motor does not vary with load

A) Windage loss

B) Copper losses

C) Any of the above

D) None of the above

During the charging of a lead-acid cell

A) Its voltage increases

B) It gives out energy

C) Its cathode becomes dark chocolate brown in color

D) Specific gravity of H2SO4 decreases

If in a synchronous motor, driving mechanical load and drawing current at lagging power factor from the constant voltage supply, its field excitation is increased, then its power factor

A) Become more

B) Become less

C) Remain constant

D) None of the above

Which of the following primary cells has the highest voltage

A) Manganese-alkaline

B) Carbon-zinc

C) Lithium

D) Mercury

The Q of a tuned amplifier is generally

A) Less than 5

B) Less than 10

C) More than 10

D) None of the above

The values of the h parameter of a transistor in CE arrangement are—- arrangement?

A) The same as for CB

B) The same as for CC

C) Different from that in CB

D) None of the above

The maximum length of a screw conveyer is about

A) 30 metres

B) 40 metres

C) 60 metres

D) 100 metres

Direct water cooling of rotor winding presents

A) No mechanical difficulties

B) Lesser mechanical difficulties

C) Greater mechanical difficulties

D) None of the above

During short-circuit, test iron losses are negligible because of

A) The current on the secondary side is negligible

B) The voltage on the secondary side does not vary

C) The voltage applied on the primary side is low

D) Full-load current is not supplied to the transformer

Circuits by measuring

A) Current during abnormal condition

B) Voltage during abnormal condition

C) Constantly the electrical quantities which differ during normal and abnormal
conditions

D) None of the above