Ballast

Question 1

What is the practical height limit of an upfeed system?

Answer 1

40’ to 60’

Question 2

How is the max height of a downfeed system calculated?

Answer 2

The max pressure of a fixture / .434

Max pressure of a fixture is normally between 45 & 60 psi.

.434 psi required to lift up 1 ft. of water

Question 3

What grade of copper is most commonly used for the majority of a plumbing system in a building?

What are the other grades?

Answer 3

Type L

Type K and Type M

Question 4

Valve type used where water flow is variably and frequently controlled, such as with faucets or hose bibs. Friction loss is high.

Answer 4

Globe Valve

Question 5

Valve type that is used where control is completely on or off. Low friction loss.

Answer 5

Gate Valve

Question 6

Valve type that works automatically and allows water flow in only one direction. For example, where backflow might contaminate a potable water supply.

Answer 6

Check Valve

Question 7

Emergency lighting in means-of-egress areas must have an intensity of no less than ___ fc.

Answer 7

1 fc

Question 8

Information regarding the minimum number of plumbing fixtures required for various occupancies may be found in which of the following sources?

A. building codes
B. plumbing codes
C. both building and plumbing codes
D. the local authority having jurisdiction

Answer 8

C. both building and plumbing codes

Question 9

The minimum fresh air ventilation rate recommended by ASHRAE Standard 62 is

A. 5 cfm/person
B. 10 cfm/person
C. 15 cfm/person
D. 20 cfm/person

Answer 9

C. 15 cfm/person

Question 10

ln areas unobstructed forward reach, light switches and thermostats may be located a maximum of

A 42 in (106’1) above the finished floor
B. 44 in (1118) above the finished floor
C. 48 in (1220) above the finished floor
D. 54 in (1372) above the finished floor

Answer 10

C. 48 in (1220) above the finished floor

Question 11

The fraction of the radiant energy received on the surface that is reflected.

Answer 11

The Albedo

Question 12

Surfaces with ______ albedo absorb radiant energy.

Answer 12

Low

Question 13

Which of the following is NOT a type of shading device?

A. Loggia
B. brise-soleil
C. Engawa
D. Belvedere

Answer 13

D. Belvedere

Question 14

What is the required psi to lift 1’ of water?

Answer 14

.433 psi

Question 15

Energy transfer wheels

A. Temper incoming air with exhaust

B. use ground temperature for heating and cooling

C. Capture the heat of flue gases to warm cold water.

D. Exchange heat from solar panels to an airstream.

Answer 15

A. Temper incoming air with exhaust

Question 16

For a window with no light shelf, daylighting is effective for a distance of about ____ times the head height of the window.

Answer 16

1.5

Question 17

For a window with a light shelf daylighting is effective to about ____ to ____ times the head height.

Answer 17

2.0 to 2.5

Question 18

In calculating solar heal gain, what value must be known in addition to the area of the glass?

A. mean radiant temperature
B. design cooling factor
C, equivalent temperature difference
D. coefficient of heat transfer

Answer 18

B. design cooling factor

Question 19

A building in a temperate climate will have some areas that require cooling and others that require heating at the same time. To minimize energy use, the best devices to
employ are

A. energy recovery ventilators
B. heat pipes
C. recuperative fuel econon1izers
D. water-loop heat pumps

Answer 19

D. water-loop heat pumps

Question 20

Guideline for selecting a cooling system for an older home is 1 ton of cooling for approximately ____sq ft

Answer 20

500 sq ft

Question 21

Guideline for selecting a cooling system for a newer home is 1 ton of cooling for approximately ____sq ft

Answer 21

1000 sq ft

Question 22

The energy policy act of 1992 requires a maximum of ____ gallons of water for

Shower heads-
Toilets-
Urinals-

Answer 22

Shower heads- 2.5 gallons per minute
Toilets- 1.6 gallon per flush
Urinals- 1 gallon per flush

Question 23

Formula for illuminance

Answer 23

E = I / D^2