TSSA G2 PRACTICE QUESTIONS (UNITS
10-16) WITH CORRECT ANSWERS
(10) What is a Servo? - Correct Answers -A mechanism set in motion by other
mechanisms
(10) What is Setpoint? - Correct Answers -The desired outlet perssure
(10) Which regulator is more accurate; pilot operated or direct operated? - Correct
Answers -Pilot operated
(10) In which applications are pilot operated regulators normally employed other than
servo regulation? - Correct Answers -High capacity applications in commercial,
institutional, and industrial settings.
(10) How is the accuracy of a regulator determined? - Correct Answers -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 Answers -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 Answers -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 Answers -By changing the orifice size
(10) Which way should the adjustment screw be turned to increase downstream
pressure? - Correct Answers -Clockwise
(10) Where shouldn't leak limiting devices installed and why? - Correct Answers -
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 Answers -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 Answers -Positive shut-off type
(10) What drill size opening do most small appliance regulators vent through to the
indoors (in a ventilated area). - Correct Answers -#78 Drill size
(10) For piping systems over 2 psi, a line pressure regulator must be equipped with
__________ or ___________. - Correct Answers -A line relief device or an
overpressure protection device
(13) P.1 - If a transformer's primary and secondary sides are in phase what should be
the voltage between the hot and the ungrounded side of the secondary? - Correct
Answers -96 V
(13) P.2 - If the reading is 144 V what should you do? - Correct Answers -Move the
ground to the other terminal of the secondary and now the reading between L1 and the
ungrounded side of the secondary will be 96 V; you have now identified the proper
secondary side terminal to use as Hot (R)
(13) What standard outlines the minimum requirements that should be followed when
working with live voltage? - Correct Answers -CSA Z462
(14) What is the HDL (negative inches w.c.) for an airtight woodstove or fireplace? -
Correct Answers -0.04
(10) What are the minimum and maximum hydrostatic relief device pressures on liquid
propane systems? - Correct Answers -375 psi and 500 psi
(10) What are the typical upstream and manifold gas pressures for NG and LP - Correct
Answers -LP: 13" w.c. upstream, 11" w.c. manifold
NG: 7" w.c. upstream, 3.5" w.c. manifold
(10) - Correct Answers -
(10) After a gas piping system has been installed, how many pressure tests are required
and when? - Correct Answers -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 Answers -inspected and tested
(10) How do you check for seepage at the gas meter? - Correct Answers -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
10-16) WITH CORRECT ANSWERS
(10) What is a Servo? - Correct Answers -A mechanism set in motion by other
mechanisms
(10) What is Setpoint? - Correct Answers -The desired outlet perssure
(10) Which regulator is more accurate; pilot operated or direct operated? - Correct
Answers -Pilot operated
(10) In which applications are pilot operated regulators normally employed other than
servo regulation? - Correct Answers -High capacity applications in commercial,
institutional, and industrial settings.
(10) How is the accuracy of a regulator determined? - Correct Answers -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 Answers -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 Answers -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 Answers -By changing the orifice size
(10) Which way should the adjustment screw be turned to increase downstream
pressure? - Correct Answers -Clockwise
(10) Where shouldn't leak limiting devices installed and why? - Correct Answers -
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 Answers -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 Answers -Positive shut-off type
(10) What drill size opening do most small appliance regulators vent through to the
indoors (in a ventilated area). - Correct Answers -#78 Drill size
(10) For piping systems over 2 psi, a line pressure regulator must be equipped with
__________ or ___________. - Correct Answers -A line relief device or an
overpressure protection device
(13) P.1 - If a transformer's primary and secondary sides are in phase what should be
the voltage between the hot and the ungrounded side of the secondary? - Correct
Answers -96 V
(13) P.2 - If the reading is 144 V what should you do? - Correct Answers -Move the
ground to the other terminal of the secondary and now the reading between L1 and the
ungrounded side of the secondary will be 96 V; you have now identified the proper
secondary side terminal to use as Hot (R)
(13) What standard outlines the minimum requirements that should be followed when
working with live voltage? - Correct Answers -CSA Z462
(14) What is the HDL (negative inches w.c.) for an airtight woodstove or fireplace? -
Correct Answers -0.04
(10) What are the minimum and maximum hydrostatic relief device pressures on liquid
propane systems? - Correct Answers -375 psi and 500 psi
(10) What are the typical upstream and manifold gas pressures for NG and LP - Correct
Answers -LP: 13" w.c. upstream, 11" w.c. manifold
NG: 7" w.c. upstream, 3.5" w.c. manifold
(10) - Correct Answers -
(10) After a gas piping system has been installed, how many pressure tests are required
and when? - Correct Answers -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 Answers -inspected and tested
(10) How do you check for seepage at the gas meter? - Correct Answers -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
