CORRECT ANSWERS
1. As the ambient temperature decreases, the rate of vaporization
A. Increases
B. Decreases
C. Stays the same
D. Fluctuates up and down
Answer: B. Decreases
2. When testing the automatic changeover mechanic function which of the
following is NOT required?
A. Make sure all appliances and pilot lights are turned off
B. Have gas in both cylinders
C. Rotate the selector lever toward the reserve cylinder
D. Have one pigtail disconnected from the cylinder valves
Answer: D. Have one pigtail disconnect- ed
, 3. If the customer complains of low or no propane pressure, the technician
should
A. Open the container valve
B. Make sure all appliances are on
C. Install a mono meter close to the system regulator
D. Close the service valve very slowly
Answer: A. Open container valve
4. If an appliance is rated at 30,000 BTU/hr, how many approximate hours per
gallon will that appliance operate if it is running continuously
A. 3 hours
B. 6 hours
C. 9 hours
D. 12 hours
Answer: A. Three hours
5. The total rate of vaporization of propane is determined by which two factors
A. Temperature of the lp and the amount of surface area wetted by the
propane
B. The ambient air temperature and the number of appliances in the system