Piping Design

Question 1

Suction Line Velocity - Maximum

Answer 1

3,000 ft/min

Question 2

Suction Line Velocity - Minimum

Answer 2

1,500 ft/min

Question 3

Allowable Suction Line Temperature Penalty

Answer 3

2 F degrees

Question 4

Allowable Temperature Penalty for Discharge, Liquid & Condensate lines

Answer 4

1 F degree

Question 5

Suction or Discharge line velocity minimum if only horizontal

Answer 5

750 ft/min

Question 6

Liquid Line Velocity - minimum

Answer 6

No Minimum

Question 7

Liquid Line Velocity - Maximum

Answer 7

300 ft/min

Question 8

Guesstimating Pipe length less than 100 ft, multiply by …

Answer 8

2

Question 9

Guesstimating Pipe length greater than 100 ft, multiply by…

Answer 9

1.5

Question 10

The rate at which liquid refrigerant drops in pressure when it rises

Answer 10

0.5 psi/ft

Question 11

What 4 factors must be taken into consideration when sizing pipe?

Answer 11

Cost, Oil Return, Temperature Penalties, Noise

Question 12

Slope of pipe/ 10 ft.

Answer 12

1/2” in the direction of flow

Question 13

Pipe length rising greater than 5 ft. need a..

Answer 13

P-Trap

Question 14

Additional traps every…

Answer 14

10 ft.

Question 15

Double Risers are used on compressors with…

Answer 15

Unloaders

Question 16

Purpose of a Double Riser

Answer 16

Oil Return & velocity

Question 17

co-efficient of expansion of copper

Answer 17

0.0000104

Question 18

Pressure drop and system capacity are inversely proportional

Answer 18

True