A transformer oil must be free from________________?

A. Sludge
B. Odour
C. Gases
D. Mositure

In a transformer the resistance between its primary and secondary is____________?

A. Zero
B. 1 ohm
C. 1000 ohms
D. Infinite

The function of conservator in a transformer is___________________?

A. To project against’internal fault
B. To reduce copper as well as core losses
C. To cool the transformer oil
D. To take care of the expansion and contraction of transformer oil due to variation of temperature of sur-roundings

The thickness of laminations used in a transformer is usually____________?

A. 0.4 mm to 0.5 mm
B. 4 mm to 5 mm
C. 14 mm to 15 mm
D. 25 mm to 40 mm

Material used for construction of transformer core is usually___________________?

A. Wood
B. Copper
C. Aluminium
D. Silicon steel

The transformer ratings are usually expressed in terms of______________?

A. Volts
B. Amperes
C. Kw
D. Kva

Hysteresis loss in a transformer varies as CBmax = maximum flux density) ?

A. Bmax
B. Bmax1-6
C. Bmax1-83
D. B max

The noise resulting from vibrations of laminations set by magnetic forces, is termed as_________________?

A. Magnetostrication
B. Boo
C. Hum
D. Zoom

An ideal transformer has infinite values of primary and secondary inductances. The statement is______________?

A. True
B. False
D. None of these

The chemical used in breather is_______________?

A. Asbestos fiber
B. Silica sand
C. Sodium chloride
D. Silica gel