## Switch Gear The short circuit in any winding of the transformer is the result of

loose connection
mechanical vibration
insulation failure
impulse voltage

## Switch Gear Arc in a circuit breaker behaves as

a resistance decreasing with voltage rise across the arc
a resistance increasing with voltage rise across the arc
an inductive reactance
a capacitive reactance

## Switch Gear The making capacity of a circuit breaker is equal to

√2 × symmetrical breaking capacity
None of these
2.55 × symmetrical breaking capacity
√3 × symmetrical breaking capacity

## Switch Gear The rate of rise of restriking voltage depends on

the type of circuit breaker
the capacitance of the system only
the inductance of the system only
both inductance and capacitance of the system

## Switch Gear The torque produced in induction type relay is

inversely proportional to the current
proportional to the current
proportional to square of the current
inversely proportional to the square of the current

2.5 A
1 A
more than 5A
5 A