U-24: Auxiliary Building Systems

Question 0

Two most common types of occupancy sensors:

Answer 0

Infrared and ultrasonic

Question 1

Occupancy sensors are what kind of switches?

Answer 1

Automatic

Question 2

Lumens per watt is the measurement of what efficiency?

Answer 2

Lamps

Question 3

A lighting unit including the lamp, a voltage controlling device or ballast and the means of light control (reflector and refractor) is what?

Answer 3

Luminaire

Question 4

In large building what percent of the electrical load is lighting usually?

Answer 4

60

Question 5

Employing occupancy sensors can reduce lighting costs by?

Answer 5

20-60%

Question 6

Motion sensor that responds to motion

Answer 6

Ultrasonic

Question 7

What is the function of the luminaire in terms of a lamp?

Answer 7

Direct or control the light produced

Question 8

Motion detector that responds to heat

Answer 8

Infrared

Question 9

Types of luminaries consist of four kinds:

Answer 9

Recessed troffers, ceiling mount wraparounds, open reflectors and structural lighting

Question 10

What does PVB and AVB stand for?

Answer 10

Pressure vacuum breaker

Atmospheric vacuum breaker

Question 11

It protects against excessively high water temperatures?

Answer 11

Fusible plug

Question 12

What are two ways water can be distributed throughout a building?

Answer 12

Upfeed or downfeed systems

Question 13

Pressure in a building plumbing system should not drop below what pressure?

Answer 13

175 kPa

Question 14

Flashing of water into steam when faucets are open can be prevented by?

Answer 14

Temperature relief devices

Question 15

Large system that forces large amounts of water to be wasted before hot water is available

Answer 15

Non circulating system

Question 16

Back flows prevention consisting of two independently acting check valves with an automatic pressure differential valve located between the check valve. What is this method called?

Answer 16

Reduced pressure principle device

Question 17

Instaneous water heater is known as a?

Answer 17

Tankless water heater

Question 18

A pipe which usually prevents the accumulation of ground water around the buildings foundations?

Answer 18

footing drain

Question 19

Materials often used for indoor sanitary drainage systems are:

Answer 19

Cast iron, galvanized steel and copper

Question 20

How often should a water storage heater be drained, cleaned and inspected?

Answer 20

Annually

Question 21

Branch lines should not meet at angle greater than?

Answer 21

45 degrees

Question 22

Drawing out of sealing liquids in traps in a drainage system is due to?

Answer 22

Negative pressure

Question 23

When externally located the trap should be within how many millimeters from the fixture?

Answer 23

610 mm

Question 24

How many basic styles of flushometers are there?

Answer 24

2

Question 25

How many water does a toilet tank flushometer deliver every 10 seconds?

Answer 25

13.7 L

Question 26

How many valves are there on a toilet flush tank?

Answer 26

2

Question 27

Horizontal branch lines must have a adequate slope to maintain a minimum flow velocity of?

Answer 27

0.6 m/s

Question 28

How can waste gases be pushed back into the building through traps?

Answer 28

Positive pressure in the drainage system

Question 29

A pipe used to reduce hydrostatic water pressure on the walls below ground level is called a?

Answer 29

Footing drain

Question 30

What is the purpose of providing an air fusion in a water system?

Answer 30

Prevent water hammer