TSSA UNIT 10 EXAM QUESTIONS
AND ANSWERS
What situation requires a soap test - Answer-when a leak is indicated by a drop in
pressure every joint and fitting must be checked
What is the purpose or function of a solenoid valve - Answer-to open on a call for heat
and close when the heat demand is satisfied
Who has the responsibility for piping downstream of the meter - Answer-the property or
building owner
What is the proper procedure when pipe sizing - Answer--sketch the system
-select the correct code table and code zone
-size the pipe sections
-all of the above
What can occur when purging is not carried out correctly - Answer-the accidental
explosion of a gas-air mixture outside and inside the pipe becomes a possibility
What is an important safety precaution to be observed when working with oxygen
cylinders - Answer--keep oil and grease away from oxygen
-never attempt to repair a faulty cylinder
If there is a discrepancy between the specifications and the drawings, which is taken to
be correct - Answer-the specifications
How are joints made in steel piping used in gas systems - Answer--threaded
-flanged
-welded
Which of the following statements is true regarding acetylene - Answer-Acetylene is a
highly flammable gas
When a pipe and fittings are set up for welding, how wide is the root face? - Answer-
1/16 in. to 1/8 in.
What size is the Copper tracer wire on underground piping? - Answer-minimum 16
gauge
AND ANSWERS
What situation requires a soap test - Answer-when a leak is indicated by a drop in
pressure every joint and fitting must be checked
What is the purpose or function of a solenoid valve - Answer-to open on a call for heat
and close when the heat demand is satisfied
Who has the responsibility for piping downstream of the meter - Answer-the property or
building owner
What is the proper procedure when pipe sizing - Answer--sketch the system
-select the correct code table and code zone
-size the pipe sections
-all of the above
What can occur when purging is not carried out correctly - Answer-the accidental
explosion of a gas-air mixture outside and inside the pipe becomes a possibility
What is an important safety precaution to be observed when working with oxygen
cylinders - Answer--keep oil and grease away from oxygen
-never attempt to repair a faulty cylinder
If there is a discrepancy between the specifications and the drawings, which is taken to
be correct - Answer-the specifications
How are joints made in steel piping used in gas systems - Answer--threaded
-flanged
-welded
Which of the following statements is true regarding acetylene - Answer-Acetylene is a
highly flammable gas
When a pipe and fittings are set up for welding, how wide is the root face? - Answer-
1/16 in. to 1/8 in.
What size is the Copper tracer wire on underground piping? - Answer-minimum 16
gauge
