[D2L] Final Exam 오답

Question 1

What is a street 90 ?

Answer 1

a copper 90, with 1 hub end

Question 2

When installing flares, what should you NOT do?

1) use Teflon tape on the male threads

2) use thread sealant (Nylog) on the face of the flare

3) use 1 wrench on the flare nut and another wrench backing up what you are tightening to

4) check the flare face against what you are connecting to to ensure your flare is big enough

Answer 2

use Teflon tape on the male threads

Question 3

How can we setup a low pressure control?

Answer 3

Either with nitrogen or refrigerant pressure

Question 4

What does “normally” mean in a circuit drawing?

Answer 4

the position of a switch in a de-energized system

Question 5

Superheat is taken 6” after the condenser

T or F

Answer 5

False, 6” after the evaporator!!

Question 6

What is the three points of contact rule?

1) two hands and one foot; or, one hand and two feet in ladder contact while climbing the ladder

2) two hands and one foot; or, one hand and two feet in ladder contact while climbing or working off of the ladder

3) the ladder must have three points of contact with the ground or a building

4) a ladder must be carried with three points of contact, a shoulder and, one hand

Answer 6

2) two hands and one foot; or, one hand and two feet in ladder contact while climbing or working off of the ladder

Question 7

Where are single stepladders most often used?

Answer 7

applications at low or medium heights

Question 8

Why do rollers on tube cutters have a groove cut into them?

Answer 8

to allow removal of a flare

Question 9

Acetylene gas is unstable which is why

Answer 9

it is dissolved in acetone

Question 10

What colour handle would you select for a Robertson screw size 8, 9, or 10?

Answer 10

Red