Unit 24 - Chapter 111

Question 0

The system which has a storage tank above the highest fixture in the system is called

Answer 0

A down feed system

Question 1

Which of the following statements about a constant pressure system with pneumatic tank is false?

Answer 1

This system is primarily used in larger buildings

Question 2

When the max building demand for water is always less than the max flow available from a municipal or local distribution system, which of the following systems can be used?

Answer 2

Tankless constant pressure system

Question 3

Which of the following statements about non-circulating hot water systems is true?

Answer 3

The systems force large amounts of water to be wasted before hot water is available in each fixture

Question 4

Which of the following is not an element found in a circulating hot water system?

Answer 4

A fire recoil element

Question 5

In a circulating hot water system the municipal distribution systems and/or local storage tanks are used for which of the following reasons

Answer 5

Water supply to heaters only

Question 6

In a circulating hot water system automatic air cents serve which of the following functions?

Answer 6

They remove air that is released when water is heated

Question 7

The backflip prevention method which consists of two independently acting check valves with an automatic operating pressure differential relief valve located between the two check valves is called

Answer 7

Reduced pressure principal device

Question 8

Which of the following statements about pressure relief valves is false?

Answer 8

The valve must be directly connected to a drain or vent pipe

Question 9

Temperature relief devices are effective in eliminating the following problem

Answer 9

Flashing of water into steam when faucets are open

Question 10

Which of the following statements about a pressure relief valve in a building hot water system is false?

Answer 10

The relief valve may be isolated from the vessel it serves by a means of a gate valve, for the purpose of maintenance

Question 11

Most building regulations prohibit single pipe systems over ___ in length from a hot water heater or hot water recirculating line

Answer 11

15.2 m

Question 12

Building codes recommend that nowhere in a building plumbing system should the water pressure fall below

Answer 12

175 kPa

Question 13

Building codes generally limit the highest pressure permissible in plumbing systems to

Answer 13

560 kPa

Question 14

Most municipal distribution systems operate at pressures between

Answer 14

350 and 499 kPa

Question 15

Temperature relief devices limit the temperature in domestic hot systems to no more than

Answer 15

99’C

Question 16

Which of the following statements about a constant pressure water system that has a pneumatic tank is false?

Answer 16

This system is primarily used in larger buildings