Dynamo Dive Quiz

Question 1

Which type of current is produced by a dynamo?

Accepted Answer

Direct current (DC)

Answer

Alternating current (AC)

Answer

Both AC and DC

Answer

None of these

Question 2

If residual magnetism is present in a DC generator, the induced emf at zero speed will be

Accepted Answer

zero

Answer

small

Answer

high

Answer

the same as rated voltage

Question 3

A generator may lose residual magnetism due to

Accepted Answer

heating

Answer

vibrations

Answer

overexcitation

Answer

all of these

Question 4

In a DC Shunt Motor if the load current increases keeping the terminal voltage constant, then flux will

Accepted Answer

remain constant

Answer

decrease

Answer

increase

Answer

none of these

Question 5

Commutator in DC generator is used for

Accepted Answer

convert AC armature current in to DC

Answer

collecting of current

Answer

reduce losses

Answer

increase efficiency

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