TSSA G2 Practice Questions with Correct Answers

TSSA G2 Practice Questions with Correct Answers (10) What is a Servo? - Answer-A mechanism set in motion by other mechanisms (10) What is Setpoint? - Answer-The desired outlet perssure (10) Which regulator is more accurate; pilot operated or direct operated? - Answer-Pilot operated (10) In which applications are pilot operated regulators normally employed other than servo regulation? - Answer-High capacity applications in commercial, institutional, and industrial settings. (10) How is the accuracy of a regulator determined? - 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? - 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? - 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? - Answer-By changing the orifice size (10) Which way should the adjustment screw be turned to increase downstream pressure? - Answer-Clockwise (10) Where shouldn't leak limiting devices installed and why? - 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? - 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? - Answer-Positive shut-off type (10) What drill size opening do most small appliance regulators vent through to the indoors (in a ventilated area). - Answer-#78 Drill size (10) For piping systems over 2 psi, a line pressure regulator must be equipped with __________ or ___________. - 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? - Answer-375 psi and 500 psi (10) What are the typical upstream and manifold gas pressures for NG and LP - Answer-LP: 13" w.c. upstream, 11" w.c. manifold NG: 7" w.c. upstream, 3.5" w.c. manifold (10) - Answer- (10) After a gas piping system has been installed, how many pressure tests are required and when? - 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 - Answer-inspected and tested (10) How do you check for seepage at the gas meter? - 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 - Answer-Rise above grade (10) Piping may not pass under a ________ or _________ - Answer-Footing or building wall (10) How shall movable commercial cooking appliances be connected to gas lines and what standard covers this connection? - 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? - Answer-A non combustible restraining device (10) Steel gas piping must conform to which ASTM standards? - Answer-ASTM A53 or A106 (10) Schedule 40 and Schedule 80 pipe have the same ________________. - AnswerOutside diameter (10) What is the melting point of the fusible plug on an acetylene cylinder? - Answer-100 Degrees Celsius (212 Degrees Fahrenheit)