Electrical Safety Rules Quiz

17 Questions | By Jimbrown | Last updated: Jul 17, 2022 | Total Attempts: 2745

Questions

Settings

Create your own Quiz

Electricity is used all around us in our homes, offices, and streets. This ' Electrical Safety Rules Quiz' is prepared to jog your memory on the concepts of electrical safety. We have this specially designed to help you adequately prepare for the electrical safety exam. Why don’t you give it a try and see just how much you need? You can also take this quiz with your friends for excellent preparation. All the very best and study hard!

Questions and Answers

1.

Electrical equipment could ignite a flammable atmosphere in several ways.
- A.
  
  Sparks from opening and closing contacts
- B.
  
  High surface temperature
- C.
  
  Loose connections
- D.
  
  All the answers are correct.
2.

The selection of what equipment can go in a Hazardous area is determined by:
- A.
  
  The Hazardous area plan,
- B.
  
  The equipment protection type
- C.
  
  The ignition temperature of the flammable atmospheres that may occur
- D.
  
  All the answers are correct.
3.

Ex d is the type of protection designed to:
- A.
  
  Prevent ignition from arising
- B.
  
  Prevent ignition from spreading outside enclosure
- C.
  
  Limit ignition energy
- D.
  
  Prevent the atmosphere entering the enclosure
4.

Zone 0, is a Hazardous area:
- A.
  
  An area in which an explosive gas/air mixture is likely to occur in normal operation.
- B.
  
  In which an explosive gas/air mixture is continuously present, or present for long periods.
- C.
  
  An area in which an explosive gas/air mixture is not likely to occur in normal operation and, if it occur ,it will exit for only a short time.
5.

Battery spaces may be defined as:-
- A.
  
  Not hazardous area
- B.
  
  Hazardous area
- C.
  
  Hazardous area depending upon battery type, capacity and charging arrangement.
6.

What is meant by being intrinsically safe?
- A.
  
  Electric wiring executed by approved manufacture?
- B.
  
  Any electrical product, being water resistant?
- C.
  
  Product having a special wiring system?
- D.
  
  Cannot produce enough energy to ignite a gas (explode)?
7.

Some equipment may be marked with the following symbol: EX i what does that mean?
- A.
  
  Intrinsically safe.
- B.
  
  Explosion proof.
- C.
  
  Internally explosion proof.
- D.
  
  Not safe in gas dangerous area.
8.

In installations of INTRINSICALLY SAFE equipment it is required that all equipment should be separated from non-intrinsically safe equipment, and to be of a special colour. What colour is that?
- A.
  
  Red
- B.
  
  Orange
- C.
  
  Blue
- D.
  
  Green/Yellow
9.

Flanges of some pipe work are bonded because:
- A.
  
  These can become electrostatically charged by movement of the fluids within them
- B.
  
  There can be a potential risk of a spark discharge and ignition of any gas present outside
- C.
  
  Earthling the vessel prevents the build-up of such charges.
- D.
  
  A,B & D
10.

The equipments that maintain a small internal overpressure (of the order of 0.5 mbar minimum) which prevents the entry of a gas/air explosive mixture or flammable substance are known as:
- A.
  
  Ex-d
- B.
  
  EX-i
- C.
  
  EX-p
11.

The minimum temperature required to cause self-sustained combustion without a flame in any material is the
- A.
  
  Flash point
- B.
  
  Fire point
- C.
  
  Ignition temperature
- D.
  
  All answers are wrong
12.

The three elements necessary for a fire or explosion hazard to exist.
- A.
  
  Earth, Wind and Fire
- B.
  
  Fuel, Source of ignition, Oxygen (air)
- C.
  
  Gasoline, Cigarette lighter, Fumes
- D.
  
  Vapors, Source of ignition, nitrogen
13.

Which of the following does not describe a confined space?
- A.
  
  Limited access
- B.
  
  Limited natural ventilation
- C.
  
  Limited working space
- D.
  
  An area designed for human occupancy
14.

Which one of the following is the major secondary parameter for equipment in Hazardous atmospheres:
- A.
  
  Gas grouping
- B.
  
  Surface temperature
- C.
  
  Protection against ingress of solid bodies and liquid (IP)
15.

HIMAP is -------- measuring and portection device.
16.

Material which permits the flow of ------ are referred to as conductors
17.

One of the below areas is not a hazardous area:
- A.
  
  Areas close to cargo tanks and piping.
- B.
  
  Areas close to cargo tank and piping relief valves and vents.
- C.
  
  Battery and paint locker
- D.
  
  Motor room with supply fans located outside of the dangerous zones.