Lesson 7

Question 1

A rubber line hose is used to protect Qualified Electrical Workers from accidental electrical contacts.

Select one:
True
False

Answer 1

True

Question 2

All line hoses should be ? .

Select one:

a. cleaned and inspected regularly
b. kept clean and lubricated
c. stored in a metal cylinder
d. tested for insulation integrity every 6 months

Answer 2

a. cleaned and inspected regularly

Question 3

Line hose is available in varying lengths and in diameters ranging from 1” to ? .

Select one:

a. 1 1/4”
b. 1 1/2”
c. 2”
d. 2 1/2”

Answer 3

b. 1 1/2”

Question 4

Rubber blankets are the only things used to cover insulators.

Select one:
True
False

Answer 4

False

Question 5

A conductor cover, fabricated from high-dielectric polyethylene, clips on and covers conductors up to ? in diameter.

Select one:

a. 1”
b. 2”
c. 3”
d. 4”

Answer 5

b. 2”

Question 6

To prevent tie wires from contacting the crossarm when conductors are being tied or untied, ? are used.

Select one:

a. doubled-up rubber blankets
b. flattened-out rubber line hoses
c. high-dielectric-strength polyethylene crossarm covers
d. hot-line holding tools

Answer 6

c. high-dielectric-strength polyethylene crossarm covers

Question 7

How should rubber blankets be stored when on the truck?

Select one:

a. Folded in a bin
b. Hung up in the bed of truck
c. In PCV tubes or a canvas bag
d. Thrown in a bin on the truck

Answer 7

c. In PCV tubes or a canvas bag

Question 8

Odd-shaped conductors and equipment can usually be covered best with a rubber insulating blanket.

Select one:
True
False

Answer 8

True

Question 9

A line hose provides Qualified Electrical Workers ? when used on energized conductors.

Select one:

a. a place to lie across to work on an outside phase
b. a margin of safety, for error without injury
c. a safe barrier against grounding themselves
d. the right to break the minimum approach distance of phase-phase conductors

Answer 9

b. a margin of safety, for error without injury

Question 10

All rubber insulating protective equipment must be treated with care, kept clean, and ? .
Select one:
a. air dried when cleaned
b. inspected at regular intervals
c. stored out of the environment in metal cylinders
d. tested monthly

Answer 10

b. inspected at regular intervals

Question 11

New rubber goods issued to a Qualified Electrical Worker can be assumed to be in good condition.

Select one:
True Incorrect
False

Answer 11

False

Question 12

Rubber protective line hose provides the Qualified Electrical Worker an absolute barrier against injury while working on energized conductors.

Select one:
True
False

Answer 12

False

Question 13

The use of the protective equipment should be ? , along with all other aspects of hot-line work.

Select one:

a. carefully planned
b. discussed at the morning briefing
c. regarded casually
d. second nature to the Qualified Electrical Worker

Answer 13

a. carefully planned

Question 14

Ozone is created by ? from the oxygen in the air, generally in quite low concentrations, but enough to damage rubber over time.

Select one:

a. moisture
b. static electricity
c. sunlight
d. ultra violet rays

Answer 14

c. sunlight

Question 15

A natural enemy of rubber that can be removed by hot, soapy water is ? or grease.

Select one:

a. corona
b. creosote
c. oil
d. ozone

Answer 15

c. oil

Question 16

A luminous discharge due to ionization of air surrounding an electrical conductor with a voltage gradient exceeding a certain critical value is called ? .

Select one:

a. arc flashing
b. corona
c. flashing over
d. radiation exposure

Answer 16

b. corona

Question 17

The strain or elongation of rubber is caused any time the rubber is distorted from its natural shape.

Select one:
True
False

Answer 17

True

Question 18

Two things that contribute to ozone cutting damage of rubber are misapplication and improper ? .

Select one:

a. cleaning
b. handling
c. storage
d. testing

Answer 18

c. storage

Question 19

The highest maximum use voltage for rubber insulating equipment for a phase-to-ground exposure is ? .

Select one:

a. 16 kV
b. 26 kV
c. 36 kV
d. 46 kV

Answer 19

c. 36 kV

Question 20

A second point of contact is the point ? .

Select one:

a. during the contact when equal potential grounding reduces the current value to zero
b. when protective equipment opens the circuit
c. where current leaves the body if contact is made with a hot circuit
d. where grounds are attached to the neutral

Answer 20

c. where current leaves the body if contact is made with a hot circuit

Question 21

The most common live-line work method on distribution voltages in the electrical industry is the ? method.

Select one:

a. bare hand
b. hot stick
c. PPG
d. rubber glove

Answer 21

d. rubber glove

Question 22

A rubber blanket rated for 20,000 volts is placed over a line hose that is also rated at 20,000 volts. This combination of protective equipment has an insulating value of ? .

Select one:

a. 20,000 V
b. 30,000 V
c. 40,000 V
d. 60,000 V

Answer 22

a. 20,000 V

Question 23

The minimum distance between the cuff of a class 2 rubber glove and the cuff of the leather protector is ? .

Select one:

a. 1”
b. 2”
c. 3”
d. 4”

Answer 23

b. 2”