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Flashcards in Quiz #1 Deck (20):
1

When working on a high voltage circuit, you should always have another person present with you. This person should have a good working knowledge of __________.
a. the circuit being worked on and the location of all switches and circuit breakers controlling it
b. first-aid techniques for treating electrical shock
c. cardiopulmonary resuscitation (CPR)
d. all of the above

all of the above

2

Which of the following statements represents the FIRST precaution to be taken prior to working on any installed electrical component?
a. Wear rubber gloves and boots.
b. Open the supply circuits and tag the switches.
c. Use only approved non-conducting tools.
d. Ground the case of the machine before beginning any repairs.

Open the supply circuits and tag the switches.

3

Before any work on electrical or electronic equipment is performed, which of the following precautions should be carried out?
a. De-energize the applicable switchboard bus.
b. Station a man at the circuit supply switch.
c. Bypass the interlocks.
d. Secure and tag the supply circuit breaker in the open position.

Secure and tag the supply circuit breaker in the open position.

4

When maintenance personnel are working on electrical equipment, all supply switches should be secured in the open position and tagged specifically by the __________.

person performing the repair

5

When working on electrical circuits containing large capacitors, in addition to de-energizing the circuit, what precaution should also be taken?

Ground the capacitor terminals.

6

Before touching a small capacitor connected to a de-energized circuit, or even one that is completely disconnected, you should __________.

short circuit the terminals to make sure that the capacitor is discharged

7

When working on a high voltage circuit, you should always have another person present with you. This person should have a good working knowledge of the hazards associated with working on high voltage electrical circuits as well as first aid techniques for treating electrical shock. What other knowledge is essential?

Working knowledge of the circuit being worked on and all means of isolation and grounding.

8

Before any work on electrical or electronic equipment is performed, what is the first precaution that should be carried out?

Secure and tag the supply circuit breaker in the open position.

9

Most fatalities from electrical incidents occur from which common shipboard voltage?

115 VAC

10

Arc Flash will occur from electrical incidents from which common shipboard voltage?

460 VAC

11

To extinguish an electrical fire, you should use __________.

carbon dioxide

12

To use a portable CO2 fire extinguisher, you must FIRST __________.

pull the locking pin

13

In which of the circumstances listed would a carbon dioxide fire extinguishing agent be most effective?
a. Within a closed space
b. As a cooling agent
c. On a magnesium fire
d. At a range of 15 feet

a. Within a closed space

14

What is the correct method to use when applying CO2 from a portable fire extinguisher?

Apply CO2 to the base of the flames in a sweeping motion.

15

What danger to personnel exists when a carbon dioxide fire extinguisher is discharged in a small enclosed space?

Suffocation

16

The MAIN objection to the use of a dry chemical fire extinguisher on an electrical fire is that the __________.

dry chemical leaves a powder residue which may render electrical equipment inoperative

17

The best way to effectively use a dry chemical type fire extinguisher in fighting a fire, is to __________.

discharge a stream at the base of the fire, starting at the near edge, and use side-to-side sweeping motions

18

What represents the correct action to take when three crew members discover a fire?

?

19

Which of the listed fire extinguishers cannot be easily recharged aboard ship?
a. Soda acid
b. Foam
c. Carbon dioxide
d. Dry chemical, cartridge-operated

Carbon dioxide

20

If a portable carbon dioxide fire extinguisher has been partially discharged, it should be immediately __________.

tagged 'empty' and stowed separately from charged extinguishers