Electrical Safety Rules Test (Part 4 Of 4)-electrical Person
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Electricity moves quickly through the water, and the human body consists mostly of water; it is dangerous when it comes to our body. To protect yourself, you should properly educate yourself and ensure that your work environment is safe and free of electrical hazards. Take this 4th electrical safety rules test and see just how much you know. All the best!
- 1.Switching surge is
- A.
High voltage dc
- B.
High voltage ac
- C.
Short duration transient voltage
- D.
Hyperbolically dying voltage.
- 2.Which of the following gas has been used as insulating medium in electrical appliances?
- A.
Nitrogen
- B.
Carbon dioxide
- C.
Sulphur hexafluoride
- D.
Freon.
- 3.Electro-mechanical breakdown of solid insulating materials occurs due to
- A.
Magnetic bum
- B.
Vibrations
- C.
Mechanical stresses produced by the electrical field
- D.
Electrical stresses produced by the voltage fluctuations.
- 4.Surge voltage originate in power systems due to
- A.
Lightning
- B.
Switching operations
- C.
Faults
- D.
A,B & C
- 5.Additional earthing can be connected local to work:
- A.
For extra confidence and operator safety
- B.
It is a mandatory requirement
- C.
For the protection of the equipment from experiencing any accidently applied
- 6.The medium employed for the extinction of arc in air circuit breaker is
- A.
SF6
- B.
Oil
- C.
Air
- D.
Water
- 7.The minimum IR value usually recommended for MV machines as
- A.
1K Ohm/volt
- B.
Machine voltage (KV+1M) Ohm
- C.
Machine rating
- D.
None of the answers are correct
- 8.Minimum insulation resistance value recommended for LV machines as
- A.
1M Ohm/1000V
- B.
2M Ohm/1000V
- C.
1000K Ohm/1000VAC
- D.
A & C
- 9.Surge arresters abord marine are used for the protection of
- A.
Motors
- B.
Generators
- C.
Transformers
- D.
All components and switch gears
- 10.Which of the statements is true with respect to ISAH3300M
- A.
It is a low voltage a.c motor protction device.
- B.
It proveds off line protection to 3.3 KV motor against ground fault.
- C.
It provides on line protection to 3.3KV motor against ground fault.
- D.
It is a low current protection relay used in the circuit of Cargo P/P motor
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