Chapter 5 - Piping, Fittings, and Valves

Question 1 of 20

1

Hydronic heating systems should never use a combination of flexible and rigid piping materials.

Select one of the following:

True
False

Explanation

Question 2 of 20

1

In the absence of any building or mechanical codes that require otherwise, type M is the standard for copper tubing used in hydronic heating systems.

Select one of the following:

True
False

Explanation

Question 3 of 20

1

Plumbing codes no longer allow solders containing lead to be used for domestic water service.

Select one of the following:

True
False

Explanation

Question 4 of 20

1

The molecular structure of nonmetallic tubes such as those made of PEX or rubber compounds is such that oxygen molecules can diffuse through their tube walls and be absorbed by the fluid within.

Select one of the following:

True
False

Explanation

Question 5 of 20

1

The pressure difference between the inside and outside of the tube has a very strong effect on oxygen diffusion.

Select one of the following:

True
False

Explanation

Question 6 of 20

1

A well-planned piping assembly will use the largest number of fittings possible.

Select one of the following:

True
False

Explanation

Question 7 of 20

1

Due to thermal expansion, the greater the length of the pipe, and the greater the temperature change, the greater the change in length.

Select one of the following:

True
False

Explanation

Question 8 of 20

1

A feed water valve is used to increase the pressure of water from a domestic water distribution pipe before it enters a hydronic system.

Select one of the following:

True
False

Explanation

Question 9 of 20

1

Piping schematics are the road maps of hydronic system design. Unfortunately, there is no universal standard for piping symbols to which all those in the hydronics industry subscribes.

Select one of the following:

True
False

Explanation

Question 10 of 20

1

In situations where both piping and electrical wiring are in close proximity, try to keep the piping above the electrical wiring.

Select one of the following:

True
False

Explanation

Question 11 of 20

1

In situations where good heat transfer through the walls of the pipe is desirable, __________ is unsurpassed.

Select one of the following:

stainless steel
copper
cross-linked polyethylene
composite tubing

Explanation

Question 12 of 20

1

Copper water tube is available in three wall thicknesses designated as types __________ in order of decreasing wall thickness.

Select one of the following:

A, B, and C
S, M, and L
K, L, and M
1, 2, and 3

Explanation

Question 13 of 20

1

Copper tubing must be properly supported to prevent sagging or buckling. On horizontal runs of hard temper tubing, the maximum support spacing for 1/2- and 3/4-inch tube is __________ feet.

Select one of the following:

2
3
4
5

Explanation

Question 14 of 20

1

In situations where several runs of piping and/or electrical conduit must be run in close proximity, a __________ system is a good option.

Select one of the following:

mounting rail
rubber liner
horizontal piping
vertical piping

Explanation

Question 15 of 20

1

Fittings for copper tubing are available in either wrought copper or __________.

Select one of the following:

stainless steel
PEX
tempered rubber
cast brass

Explanation

Question 16 of 20

1

When long straight runs of rigid tubing are required, it may be necessary to install an expansion loop or an expansion offset to absorb the movement. Another alternative is to install an expansion __________ capable of absorbing the movement.

Select one of the following:

regulator
compensator
barometer
overflow

Explanation

Question 17 of 20

1

Feed water valves operate by balancing the force generated by water pressure against an internal flexible __________, with the counterforce generated by a partially compressed spring.

Select one of the following:

feeder
cavitator
diaphragm
pressurizer

Explanation

Question 18 of 20

1

Hydronic heating systems, once assembled, must be filled, purged of air, and filled with fluid. A(n) __________ is specifically designed for this purpose.

Select one of the following:

purging valve
air deactivator valve
ball valve assembly
flow regulator valve

Explanation

Question 19 of 20

1

If the inlet pressure on the backflow preventer drops below the pressure in the hydronic system, springs return both check valves and the movable cartridge to their __________ positions.

Select one of the following:

open
closed
original
preset

Explanation

Question 20 of 20

1

Another specialty valve widely used in hydronic systems provides the ability to isolate, flow balance, and even drain individual heat emitters. It is called a __________.

Select one of the following:

zone valve
balancing valve
differential pressure bypass valve
lockshield valve

	Created by Neil Revollo about 8 years ago

Quiz #5

Chapter 5 - Piping, Fittings, and Valves

Chapter 5 - Piping, Fittings, and Valves

Question 1 of 20

Hydronic heating systems should never use a combination of flexible and rigid piping materials.

Select one of the following:

Explanation

Question 2 of 20

In the absence of any building or mechanical codes that require otherwise, type M is the standard for copper tubing used in hydronic heating systems.

Select one of the following:

Explanation

Question 3 of 20

Plumbing codes no longer allow solders containing lead to be used for domestic water service.

Select one of the following:

Explanation

Question 4 of 20

The molecular structure of nonmetallic tubes such as those made of PEX or rubber compounds is such that oxygen molecules can diffuse through their tube walls and be absorbed by the fluid within.

Select one of the following:

Explanation

Question 5 of 20

The pressure difference between the inside and outside of the tube has a very strong effect on oxygen diffusion.

Select one of the following:

Explanation

Question 6 of 20

A well-planned piping assembly will use the largest number of fittings possible.

Select one of the following:

Explanation

Question 7 of 20

Due to thermal expansion, the greater the length of the pipe, and the greater the temperature change, the greater the change in length.

Select one of the following:

Explanation

Question 8 of 20

A feed water valve is used to increase the pressure of water from a domestic water distribution pipe before it enters a hydronic system.

Select one of the following:

Explanation

Question 9 of 20

Piping schematics are the road maps of hydronic system design. Unfortunately, there is no universal standard for piping symbols to which all those in the hydronics industry subscribes.

Select one of the following:

Explanation

Question 10 of 20

In situations where both piping and electrical wiring are in close proximity, try to keep the piping above the electrical wiring.

Select one of the following:

Explanation

Question 11 of 20

In situations where good heat transfer through the walls of the pipe is desirable, __________ is unsurpassed.

Select one of the following:

Explanation

Question 12 of 20

Copper water tube is available in three wall thicknesses designated as types __________ in order of decreasing wall thickness.

Select one of the following:

Explanation

Question 13 of 20

Copper tubing must be properly supported to prevent sagging or buckling. On horizontal runs of hard temper tubing, the maximum support spacing for 1/2- and 3/4-inch tube is __________ feet.

Select one of the following:

Explanation

Question 14 of 20

In situations where several runs of piping and/or electrical conduit must be run in close proximity, a __________ system is a good option.

Select one of the following:

Explanation

Question 15 of 20

Fittings for copper tubing are available in either wrought copper or __________.

Select one of the following:

Explanation

Question 16 of 20

When long straight runs of rigid tubing are required, it may be necessary to install an expansion loop or an expansion offset to absorb the movement. Another alternative is to install an expansion __________ capable of absorbing the movement.

Select one of the following:

Explanation

Question 17 of 20

Feed water valves operate by balancing the force generated by water pressure against an internal flexible __________, with the counterforce generated by a partially compressed spring.

Select one of the following:

Explanation

Question 18 of 20

Hydronic heating systems, once assembled, must be filled, purged of air, and filled with fluid. A(n) __________ is specifically designed for this purpose.

Select one of the following:

Explanation

Question 19 of 20

If the inlet pressure on the backflow preventer drops below the pressure in the hydronic system, springs return both check valves and the movable cartridge to their __________ positions.

Select one of the following:

Explanation

Question 20 of 20