Free Printable Transformer Quiz

1.

A step up transformer increases

a)

(A) frequency

b)

(B) current

c)

(C) voltage

d)

(D) power

2.

Natural oil cooling is used for transformers upto a rating of

a)

(A) 250 kVA

b)

(B) 500 kVA

c)

(C) 1000 kVA

d)

(D) 3000 kVA

3.

The chemical used in breather is

a)

(A) silica gel

b)

(B) sodium chloride

c)

(C) silica sand

d)

(D) asbestos fibre

4.

Transformer cores are built up from laminations rather than from solid metal so that

a)

(A) eddy current loss is reduced

b)

(B) turn ratio is higher than voltage ratio

c)

(C) oil penetrates the core more easily

d)

(D) less insulation is required for the windings

5.

In a transformer the energy is conveyed from primary to secondary

a)

(A) by the flux

b)

(B) through air

c)

(C) through cooling coil

d)

(D) none of the above

6.

The path of a magnetic flux in a transformer should have

a)

(A) low reluctance

b)

(B) low resistance

c)

(C) high resistance

d)

(D) high reluctance

7.

The chemical used in breather for transformer should have the quality of

a)

(A) cooling the transformer oil

b)

(B) cleansing the transformer oil

c)

(C) absorbing moisture

d)

(D) ionizing air

8.

Power transformers are generally designed to have maximum efficiency around

a)

(A) 10% overload

b)

(B) no-load

c)

(C) half load

d)

(D) near full load

9.

Which winding in a transformer has more number of turns?

a)

(A) primary winding

b)

(B) secondary winding

c)

(C) low voltage winding

d)

(D) high voltage winding

10.

Losses which occur in rotating electric machines and do not occur in transformers are

a)

copper losses

b)

hysteresis and eddy current losses

c)

magnetic losses

d)

friction and windage losses

Transformer Quiz

Total questions: 10

Worksheet time: 5mins

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