Switchgear & Protection Test Question
Switchgear & Protection Test Question, this topic has 192 mcqs, It takes five to ten minutes to complete this free Switchgear & Protection Test Question test. You will see 4 or 5 option of each question. You must choose / think only one option and then press on answer key for check right answer. Practice "Switchgear & Protection Test Question" MCQs and share with your friends, brothers, sisters.
Switchgear & Protection Test Question (Total Quiz: 192)
MCQ: Overload relays are of_______________type
- induction
- solid state
- thermal
- electromagnetic
- all above
E
MCQ: A thermal protection switch can protect against_____________?
- short-circuit
- temperature
- overload
- over voltage
C
MCQ: SF6 gas______________?
- is yellow in colour
- is lighter than air
- is nontoxic
- has pungent small
- none of the above
C
MCQ: Which of the following medium is employed for extinction of arc in air circuit breaker?
- Water
- Oil
- Air
- SF6
C
MCQ: On which of the following routine tests are conducted ?
- Oil circuit breakers
- Air blast circuit breakers
- Minimum oil circuit breakers
- All of the above
D
MCQ: The arcing contacts in a circuit breaker are made of______________?
- copper tungsten alloy
- porcelain
- electrolytic copper
- aluminium alloy
A
MCQ: Arc in a circuit behaves as_______________?
- a capackive reactance
- an inductive reactance
- a resistance increasing with voltage rise across the arc
- a resistance decreasing with voltage rise across the arc
D
MCQ: Magnetic circuit breaker has ___________ trip action
- delayed
- instantaneous
- both of the above
- none of the above
B
MCQ: Thermal circuit breaker has____________?
- delayed trip action
- instantaneous trip action
- both of the above
- none of the above
A