SWITCH GEAR QUIZ

both detection and interruption functions

None of these

circuit interruption function only

detection function only

high conductivity

low melting point

All of these

low cost

insulate the contacts from switch body

All of these

lubricate the contacts

None of these

extinguish the arc

0.05 sec

0.2 sec

0.002 sec

0.001 sec

infinity

zero

None of these

unity

0.5 sec

100 micro-second

0.1 sec

50 milli-second

impedance relay

directional relay

non-directional relay

None of these

voltage rise

heavy current flow

no current flow

voltage drop

Load flow and stability

Load flow

Load flow, short-circuit and stability

Load flow and short-circuit

is lighter than air

Is nontoxic

is yellow in colour

has pungent small