TSSA G2 Practice Questions (Units 10-16)
UPDATED ACTUAL Exam Questions and
CORRECT Answers
(10) What is a Servo? - CORRECT ANSWER - A mechanism set in motion by other
mechanisms
(10) What is Setpoint? - CORRECT ANSWER - The desired outlet perssure
(10) Which regulator is more accurate; pilot operated or direct operated? - CORRECT
ANSWER - Pilot operated
(10) In which applications are pilot operated regulators normally employed other than servo
regulation? - CORRECT ANSWER - High capacity applications in commercial,
institutional, and industrial settings.
(10) How is the accuracy of a regulator determined? - CORRECT ANSWER - The amount
of flow it can pass for a given amount of droop determines the accuracy of a regulator. The
closer the regulator is to setpoint, the more accurate it is.
P2 - If the reading is 144 V what should you do? - CORRECT ANSWER - Move the
ground to the other terminal of the secondary and the reading between L1 and the ungrounded
side of the secondary will read 96 V
(10) What are the four factors that may affect droop? - CORRECT ANSWER - Spring
rate, diaphragm rate, orifice size, and inlet pressure
(10) In many service and line pressure regulators how can you change the flow capacity? -
CORRECT ANSWER - By changing the orifice size
,(10) Which way should the adjustment screw be turned to increase downstream pressure? -
CORRECT ANSWER - Clockwise
(10) Where shouldn't leak limiting devices installed and why? - CORRECT ANSWER -
Outdoors, because if they are exposed to the outdoors they may become clogged by moisture or
insects.
(10) What is the pitot tube design used for? - CORRECT ANSWER - To decrease
regulator droop
(10) Line pressure regulators for use on systems with an inlet pressure over 0.5 psi must be of
what type? - CORRECT ANSWER - Positive shut-off type
(10) What drill size opening do most small appliance regulators vent through to the indoors (in a
ventilated area). - CORRECT ANSWER - #78 Drill size
(10) For piping systems over 2 psi, a line pressure regulator must be equipped with __________
or ___________. - CORRECT ANSWER - A line relief device or an overpressure
protection device
(10) What are the minimum and maximum hydrostatic relief device pressures on liquid propane
systems? - CORRECT ANSWER - 375 psi and 500 psi
(10) What are the typical upstream and manifold gas pressures for NG and LP - CORRECT
ANSWER - LP: 13" w.c. upstream, 11" w.c. manifold
NG: 7" w.c. upstream, 3.5" w.c. manifold
(10) - CORRECT ANSWER -
, (10) After a gas piping system has been installed, how many pressure tests are required and
when? - CORRECT ANSWER - The first before any appliances are installed and the
second after all the appliances are installed
(10) All piping and components must be _____________ and ___________before being
concealed - CORRECT ANSWER - inspected and tested
(10) How do you check for seepage at the gas meter? - CORRECT ANSWER - Release a
small amount of gas from the system at static pressure (with the supply valve in the fully closed
position) then wait to see if the pressure creeps back up
(10) Piping shall __________ before entry into a building unless otherwise authorized by the
authority having jurisdiction - CORRECT ANSWER - Rise above grade
(10) Piping may not pass under a ________ or _________ - CORRECT ANSWER -
Footing or building wall
(10) How shall movable commercial cooking appliances be connected to gas lines and what
standard covers this connection? - CORRECT ANSWER - It shall be connected by a
certified connector complying with standard CAN/CSA-6.16
(10) When a metal connector is used with a commercial cooking appliance on wheels or rollers
what shall be provided to protect the connector? - CORRECT ANSWER - A non
combustible restraining device
(10) Steel gas piping must conform to which ASTM standards? - CORRECT ANSWER -
ASTM A53 or A106
(10) Schedule 40 and Schedule 80 pipe have the same ________________. - CORRECT
ANSWER - Outside diameter
UPDATED ACTUAL Exam Questions and
CORRECT Answers
(10) What is a Servo? - CORRECT ANSWER - A mechanism set in motion by other
mechanisms
(10) What is Setpoint? - CORRECT ANSWER - The desired outlet perssure
(10) Which regulator is more accurate; pilot operated or direct operated? - CORRECT
ANSWER - Pilot operated
(10) In which applications are pilot operated regulators normally employed other than servo
regulation? - CORRECT ANSWER - High capacity applications in commercial,
institutional, and industrial settings.
(10) How is the accuracy of a regulator determined? - CORRECT ANSWER - The amount
of flow it can pass for a given amount of droop determines the accuracy of a regulator. The
closer the regulator is to setpoint, the more accurate it is.
P2 - If the reading is 144 V what should you do? - CORRECT ANSWER - Move the
ground to the other terminal of the secondary and the reading between L1 and the ungrounded
side of the secondary will read 96 V
(10) What are the four factors that may affect droop? - CORRECT ANSWER - Spring
rate, diaphragm rate, orifice size, and inlet pressure
(10) In many service and line pressure regulators how can you change the flow capacity? -
CORRECT ANSWER - By changing the orifice size
,(10) Which way should the adjustment screw be turned to increase downstream pressure? -
CORRECT ANSWER - Clockwise
(10) Where shouldn't leak limiting devices installed and why? - CORRECT ANSWER -
Outdoors, because if they are exposed to the outdoors they may become clogged by moisture or
insects.
(10) What is the pitot tube design used for? - CORRECT ANSWER - To decrease
regulator droop
(10) Line pressure regulators for use on systems with an inlet pressure over 0.5 psi must be of
what type? - CORRECT ANSWER - Positive shut-off type
(10) What drill size opening do most small appliance regulators vent through to the indoors (in a
ventilated area). - CORRECT ANSWER - #78 Drill size
(10) For piping systems over 2 psi, a line pressure regulator must be equipped with __________
or ___________. - CORRECT ANSWER - A line relief device or an overpressure
protection device
(10) What are the minimum and maximum hydrostatic relief device pressures on liquid propane
systems? - CORRECT ANSWER - 375 psi and 500 psi
(10) What are the typical upstream and manifold gas pressures for NG and LP - CORRECT
ANSWER - LP: 13" w.c. upstream, 11" w.c. manifold
NG: 7" w.c. upstream, 3.5" w.c. manifold
(10) - CORRECT ANSWER -
, (10) After a gas piping system has been installed, how many pressure tests are required and
when? - CORRECT ANSWER - The first before any appliances are installed and the
second after all the appliances are installed
(10) All piping and components must be _____________ and ___________before being
concealed - CORRECT ANSWER - inspected and tested
(10) How do you check for seepage at the gas meter? - CORRECT ANSWER - Release a
small amount of gas from the system at static pressure (with the supply valve in the fully closed
position) then wait to see if the pressure creeps back up
(10) Piping shall __________ before entry into a building unless otherwise authorized by the
authority having jurisdiction - CORRECT ANSWER - Rise above grade
(10) Piping may not pass under a ________ or _________ - CORRECT ANSWER -
Footing or building wall
(10) How shall movable commercial cooking appliances be connected to gas lines and what
standard covers this connection? - CORRECT ANSWER - It shall be connected by a
certified connector complying with standard CAN/CSA-6.16
(10) When a metal connector is used with a commercial cooking appliance on wheels or rollers
what shall be provided to protect the connector? - CORRECT ANSWER - A non
combustible restraining device
(10) Steel gas piping must conform to which ASTM standards? - CORRECT ANSWER -
ASTM A53 or A106
(10) Schedule 40 and Schedule 80 pipe have the same ________________. - CORRECT
ANSWER - Outside diameter
