Part # 1 Flashcards
(20 cards)
- One watt equals to _______ Btuh.
a. 34,120
b. 3.41 (b)
c. 3,416
d. 0.34
- What is the area of rectangular air supply opening measuring 12”x10”?
a. 120 square inches (a)
b. 1.0 square feet
c. 100 cubic inches
d. 1.2 cubic feet
- What is resistance measured in?
a. Watts
b. Ohms (b)
c. Volts
d. Amps
- What is the expansion rate of propane?
a. 600 to 1
b. 270 to 1 (b)
c. 10 to 1
d. 1 to 600
- An indication of excessive primary air is a:
a. Quenched flame
b. Lifting flame (b)
c. Luminous flame
d. Yellow flame
- Gas piping requirements are in section _____ of the B149.1 1-05 code.
a. 2
b. 6 (b)
c. 5
d. 8
- What is a characteristic of a filaments CGI?
a. This unit may be adjusted to detect several gases at one time
b. This unit may be equipped with an audible alarm
c. This unit works on the principle of catalytic combustion (c)
d. This unit has a sensitivity has little as 2 to 3 ppm of gas in air
- Who is the testing agency that certifies venting?
a. CGA
b. CSA
c. TSSA
d. ULC (d)
- A volt is a unit of measure of:
a. The amount of electrical pressure
b. The amount of power used by a circuit
c. How much a circuit will limit current flow
d. The electrical potential difference (d)
- When can a propane line supplying a furnace in a mobile home or recreational vehicle be routed through a combustion or fresh air make-up opening in the furnace base?
a. When the propane piping through the furnace base consists of a single piece
b. When the piping is schedule 80 steel
c. Provided that any connection to this piping is made above the level of the top of the furnace base and below the lowest level of the furnace base extension
d. Both A and C (d)
- For a piping system supplying an appliance having a rated input under 400,000 Btuh (120kW), the supply line and branch line to the appliance may be purged:
a. At the main burner
b. At the drip pocket of the appliance
c. Into the combustion chamber of the appliance
d. At a readily accessible burner such as the open top burner of a gas range (d)
- The flame temperature of propane is approximately:
a. 3600 F (1980 C) (a)
b. 1500 F (816 C)
c. 3650 C (6602 F)
d. 1500 C (2732 F)
- Equipment wiring diagrams indicate which of the following?
a. Supply voltage, wire size from panel, fuse size, internal wiring
b. Supply voltage, internal wiring, location of controls, field wiring (b)
c. Supply voltage, fuse size, type of disconnect switch, factory wiring
d. Supply voltage, size of control wiring, location of gas valve, factory wiring
- What are the two common thread patterns found on bolts used by the gas technician?
a. National Course Thread
b. National Fine Thread
c. American Street Thread
d. Both A and B
- What is the chemical composition of natural gas?
a.a. C4H
b. CH3
c. CCH4
d. CH4 (d)
- Atmospheric burners are designed to operate under:
a. Normal atmospheric pressure with low gas pressure (a)
b. High air pressure with low gas pressure
c. Atmospheric pressure with high gas pressure
d. Compressed air pressure with high gas pressure
- How can combustible gases be ventilated, provided it is safe to do so?
a. Using an exhaust fan
b. Open doors and windows (b)
c. Using the fan on the furnace
d. Both A and B
- What is the term for a device that is installed between the appliance and the vent termination and provides mechanical draft?
a. Mechanical inducer
b. Power venter (b)
c. Vent exhauster
d. Power burner
- Can propane be transferred from one container to another?
a. No
b. Yes, if the transfer is conducted in a pit to contain any leakage
c. Yes, if the transfer is conducted at a licensed facility with certified equipment
d. Yes, if the transfer is conducted by a trained person holding a certificate recognized by the authority having jurisdiction (d)
- What tool is used to cut external threads on pipe?
a. Pipe dies
b. A file
c. A crimping tool
