Exam 5: Valves and Devices

All hose bibbs are protected with a backflow device.

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.

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

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

What is the purpose of a Stop and Waste valve?

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

What is the purpose of a hose bibb?

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

What is the purpose of a relief valve?

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.

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

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

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

Name the common isolation valves used for water systems.

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

What is a ball valve?

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.

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

Valves and devices are categorized based on their ____________________ capabilities.

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