Deck 10: System Connections

Question 1

When brazing, the copper pipe is heated to ____ degrees F.

A) 300 - 500
B) 500 - 800
C) 800 - 1500
D) over 1500

Answer 1

D

Question 2

What type of gas is used to pressurize new ACR piping circuits for leak detection purposes?

A) oxygen
B) carbon dioxide
C) nitrogen
D) refrigerant

Answer 2

C

Question 3

Soft-drawn copper tubing typically comes in ____ ft rolls.

A) 25
B) 50
C) 75
D) 100

Answer 3

B

Question 4

Which HVAC wiring connections are low voltage?

A) from the condensing unit to the air handler
B) from the circuit panel to the condensing unit
C) from the circuit panel to the air handler
D) from the outside disconnect to the condensing unit

Question 5

__________, a material that is applied to the male portion of a joint prior to soldering, reduces the amount of oxidation on the joint and helps remove dirt or other particulate matter from the joint while soldering.

A) ACR
B) flux
C) mastic
D) PVC

Question 6

Refrigerant traps are designed to aid in the return of __________ to the compressor.

A) cooling
B) heating
C) oil
D) water

Question 7

Type L copper pipe is measured by the outside diameter.

Question 8

It is necessary to use flux when brazing one copper component to another.

Question 9

What are the two alloys in 50/50 solder?

A) tin, silver
B) tin, copper
C) tin, lead
D) silver, antimony

Question 10

Hard-drawn copper pipe is often bent in the field during system installation.

Question 11

ACR copper pipe is measured by the outside diameter.

Question 12

When flaring copper tubing, a ____-degree bevel is created.

A) 30
B) 45
C) 60
D) 90

Question 13

The nominal size of 5/8" O.D. copper pipe is ____.

A) 1/2"
B) 3/4"
C) 5/8"
D) 7/8"

Question 14

When soldering, the copper pipe is heated to ____ degrees F.

A) 300 - 500
B) 500 - 800
C) 800 - 1500
D) over 1500

Question 15

What are the two alloys in 95/5 solder?

A) tin, lead
B) antimony, lead
C) silver, lead
D) tin, antimony

Question 18

When referring to plastic pipe, what does the acronym ABS stand for?

Question 19

List eight commonly used pipe fittings.

Question 21

When referring to plastic pipe, what does the acronym PVC stand for?

Question 25

One of the most important tasks the installation crew can perform to ensure the long-term satisfactory operation of the air conditioning system is the proper installation of the refrigerant lines. List six guidelines for installing refrigerant lines so that they will operate correctly.