Safety Chapter 39

1.

1 point

Temporary electrical hook-ups should

a) be in place for a maximum duration of 72 hours only

b) be made with BX electrical cable

c) be designed to the original specifications

d) comply with the ASME codes

e) have CSA pre-approval

2.

1 point

An example of a class "C" fire would be

a) a fire in an electrical panel

b) a fire in a trash bin

c) a fire in a fuel tank

d) a precious metals fire

e) a fire in a coal storage pile

3.

1 point

During annual turnaround of a facility it is highly
recommended that

a) all fuses in the electrical system be replaced

b) aluminum wiring be replaced

c) all electrical connections be checked for tightness and corrosion

d) all circuit breakers be disassembled and cleaned

e) a megger be used on all electric motor windings

4.

1 point

A common cause of an electrical fire is

a) allowing motors or conductors to get wet if not designed for that purpose

b) prematurely replacing deteriorated wiring

c) following too closely to the Electrical Code when installing electrical equipment

d) replacing burned fuses with ones of the same rating

e) waiting a specified amount of time between attempts to start large motors

5.

1 point

Overheating of electrical equipment is

a) the most common cause of fires in buildings

b) usually the result of inadequate wiring

c) often due to over-sized fuses being installed

d) the result of blocked cooling fin passages

e) illegal in most provinces

6.

1 point

Under the Canadian Electrical Code, if an area contains dust
in the air, under normal operating conditions, in
concentrations high enough to produce explosive or ignitable
mixtures, the electrical equipment must be designed safe for
use in an area classification of

a) Class I, division I

b) Class I, division II

c) Class II, division I

d) Class II, division II

e) Class III, division I

7.

1 point

The best type of fire extinguisher to use on a live
electrical fire is a

a) pressurized water extinguisher

b) dry chemical extinguisher

c) purple K extinguisher

d) AFFF extinguisher

e) carbon dioxide extinguisher

8.

1 point

When an electrical fire is discovered

a) the equipment may be left running if the fire is put out with a C type fire extinguisher

b) the equipment should be de-energized as quickly as possible

c) the equipment should be left running until a backup power supply is available

d) the equipment may be immediately restarted once the fire is extinguished

e) fresh air should be provided to the room as quickly as possible to get rid of toxic fumes

9.

1 point

Under the Canadian Electrical Code, if an area contains
hazardous concentrations of flammable gases or vapours under
normal conditions, electrical equipment must be designated
safe for use in an area classification of

a) Class 1, division 1

b) Class 1, division 2

c) Class 2, division 1

d) Class 2, division 2

e) Class 3, division 1

10.

1 point

Electrical connections

a) need only make contact, they need not be tight

b) will create large amounts of heat if not tight

c) can cause an arc if too tight

d) may operate on overload for specified durations

e) will not generate heat at any time

11.

1 point

You discover that a small fire has been started in a high
tension switch box. In your immediate area there are four
different types of fire extinguishers. The one you put the
fire out with should be the

a) soda - acid extinguisher

b) dry chemical extinguisher

c) chemical foam extinguisher

d) cold water extinguisher

e) one closest to you

12.

1 point

According to the Canadian Electrical Code an area where
easily ignited material fibres capable of producing
combustible flyings are handled or manufactured would be
classified as a

a) Class I, division I

b) Class I, division II

c) Class II, division I

d) Class II, division II

e) Class III, division I

13.

1 point

The temperature of the carbon dioxide leaving the
extinguisher horn can be as low as

a) 0 degrees C

b) -5 degrees C

c) -30 degrees C

d) -60 degrees C

e) -80 degrees C

14.

1 point

Halon from halon fire extinguishers

a) produces a distinct odor which warns of the presence of halon

b) is abrasive to electrical equipment

c) will act as a conductor if moisture is present

d) is derived from bromine, fluorine, or chlorine

e) is corrosive

15.

1 point

Electrical circuit insulation

a) will never break down or deteriorate

b) requires replacement after 10 years

c) is not affected by temperature

d) will not burn

e) will deteriorate due to high temperatures