Deck 5: Valves and Devices

Question 1

Valves and devices are categorized based on their ____________________ capabilities.

Answer 1

pressure

Question 2

Most codes dictate that the minimum size of a residential water service is 1/2".

Answer 2

False
Most codes dictate that the minimum size of a residential water service is 3/4".

Question 3

What is a ball valve?

Answer 3

A ball valve utilizes an internal ball having a hole in its center that creates a flow passageway through the valve.The ball valve isolates flow when the ball is rotated 90° from the flow direction.

Question 4

What are the two most common type of connections manufactured with brass valves and devices in residential plumbing?

Question 5

A boiler drain is available with male and female threads,and the most common sizes are _____" and _____".

Question 6

Depending on the region of the country,the municipal water authorities install an isolation valve before a water meter to allow for repair or replacement.

Question 7

A ____________________ is a unique valve designed to isolate the flow of gas in a gas distribution system.

Question 8

Most gate-valve designs are not a direction-style valve and can be installed based on desired handle location instead of the direction of the flow of a piping system.

Question 9

All valves and devices can be installed in any position.

Question 10

Every residential dwelling is required by code to be provided with at least one isolation valve.

Question 11

To ensure the water drains from the hose faucet,it must be installed sloping slightly downward toward the exterior of the building.

Question 12

The _____ of the piping system is a factor in determining the possible volume of water that can be supplied by a particular pipe size.

Question 13

Codes typically allow the water service piping and hose faucets to exceed _____ psi.However,piping that serves fixtures must be reduced to a maximum pressure of _____ psi.

Question 14

A backflow-prevention device known as a ____________________ is installed to ensure that water flows in one direction.

Question 15

A _______________ valve utilizes a metal gate (disc)that slides vertically to open and close the valve.

Question 16

What is the purpose of an isolation valve?

Question 17

What is the purpose of pipe insulation?

Question 18

A _______________ is a valve design that utilizes a rubber washer to stop the flow of water and is a directional flow isolation valve.

Question 19

The most common classifications of residential valves and devices are _____ and _____ pounds per square inch.

Question 20

All hose bibbs are protected with a backflow device.

Question 21

What is the purpose of a relief valve?

Question 22

What is the purpose of a hose bibb?

Question 23

Name the common isolation valves used for water systems.

Question 24

What is the purpose of a Stop and Waste valve?