Propane Certification Propane Storage and Handling 2

Question 1

What is the primary distinction between a DOT cylinder and an ASME propane container?

Accepted Answer

DOT cylinders are portable and built to Department of Transportation specs; ASME containers are stationary and built to pressure vessel codes

Answer

DOT containers are for industrial use only; ASME containers are for residential use only

Answer

DOT containers are always larger in capacity than ASME containers

Answer

ASME containers must always be buried underground; DOT cylinders are always above ground

Question 2

What does 'FIFO' mean in the context of propane cylinder storage, and why is it practiced?

Accepted Answer

First In, First Out — older cylinders are used before newer ones to prevent exceeding requalification dates

Answer

Fill In, Fill Out — a procedure requiring empty cylinders to be refilled before new stock is accepted

Answer

Fuel Injection, Fuel Operation — a burner management control sequence

Answer

Final Inspection, Final Outflow — a quality control release process

Question 3

What is the standard requalification interval for most DOT propane cylinders after their initial 12-year qualification period?

Accepted Answer

5 years

Answer

3 years

Answer

7 years

Answer

10 years

Question 4

In what direction must the discharge outlet of a propane container's pressure relief valve (PRV) be directed?

Accepted Answer

Away from the container and toward an open area, not toward personnel or ignition sources

Answer

Toward the ground to prevent gas from rising toward ignition sources

Answer

Toward the connected appliance to enable controlled venting

Answer

Downward into a collection pipe for gas recovery

Question 5

Per NFPA 58, what minimum separation is required between separate groups of propane cylinders stored outdoors when the aggregate LP-Gas content of any group exceeds 300 pounds?

Accepted Answer

20 feet

Answer

5 feet

Answer

10 feet

Answer

25 feet

Question 6

What special consideration applies to forklift propane cylinders compared to standard upright residential cylinders?

Accepted Answer

Forklift cylinders are mounted horizontally and require a liquid service valve with a dip tube configured for that orientation

Answer

Forklift cylinders operate at significantly higher pressures requiring thicker walls

Answer

Forklift cylinders contain a propane-butane mixture different from standard LP-Gas

Answer

Forklift cylinders are exempt from DOT requalification requirements

Question 7

When transporting propane cylinders in an enclosed vehicle, which of the following practices is required?

Accepted Answer

Cylinders must be secured upright and the vehicle must be adequately ventilated

Answer

Cylinders must be emptied before transport in any enclosed vehicle

Answer

Cylinders must be refrigerated during transport in warm weather conditions

Answer

Cylinders must be transported with a continuously active propane gas detector