Exam questions

Question 1

Higher K factor means _______ gas flow

Answer 1

higher

Question 2

Name the products of combustion

Answer 2

CO2, H2O, Heat, N2, light

Question 3

Venturi is the area of low pressure, _____ velocity

Answer 3

high

Question 4

Name the two types of infrared burners

Answer 4

high intensity

low intensity

Question 5

Name 3 types of manual gas shutoff valves

Answer 5

1. ball
2. needle
3. plug

Question 6

1. 100% shutoff means __ gas is flowing

2. 80% shutoff means ___ gas is flowing to pilot

Answer 6

1. no

2. 20%

Question 7

Solenoid valve is controlled by an ___________ force

Answer 7

electromagnetic

Question 8

diaphragm valve is controlled by ____ pressure

Answer 8

gas

Question 9

Vent gas goes into the ___________ chamber

Answer 9

combustion

Question 10

Name the three components of a combination gas valve?

Answer 10

1. pilot safety assembly
2. appliance regulator
3. automatic gas valve

Question 11

Redundant gas valve is ___% safe

Answer 11

100%

Question 12

Rod and tube type valve opens/closes based on the expansion of metal due to _________

Answer 12

temperature

Question 13

Seismic valve is used to shutoff gas in the case of an _________, must be manually ________

Answer 13

1. earthquake

2. reset

Question 14

An emergency fuel shutoff is connected to the fire ________ system

Answer 14

suppression

Question 15

What provides the force for lockup to occur?

Answer 15

lever

Question 16

What system requires a two-stage regulator?

Answer 16

propane system

Question 17

When can you use a twin-stage regulator in a propane system?

Answer 17

when piping is 30 feet or less

Question 18

Do you put a valve before or after a safety device?

Answer 18

NEITHER

Question 19

Can you pipe a drain through a roof?

Answer 19

yes if you install a drain pan