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TSSA G2 FINAL EXAM COMPLETE 200 QUESTIONS & CORRECT ANSWERS (WELL VERIFIED) GRADED A+, Exams of Nursing

TSSA G2 FINAL EXAM COMPLETE 200 QUESTIONS & CORRECT ANSWERS (WELL VERIFIED) GRADED A+

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TSSA G2 FINAL EXAM COMPLETE 200 QUESTIONS &
CORRECT ANSWERS (WELL VERIFIED) GRADED A+
(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
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TSSA G2 FINAL EXAM COMPLETE 200 QUESTIONS &

CORRECT ANSWERS (WELL VERIFIED) GRADED A+

(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) What is the melting point of the fusible plug on an acetylene cylinder? **- CORRECT ANSWER

** 100 Degrees Celsius (212 Degrees Fahrenheit) (10) What standard governs gas utilities? - CORRECT ANSWER >>> CSA Z (10) If there is disagreement between a specification and a drawing which is usually taken to be correct? - CORRECT ANSWER >>> The specifications because they are prepared last (10) What is a typical manual valve found on gas systems - CORRECT ANSWER >>> 1/4 turn valve (10) When a rooftop piping run exceeds 100ft in any one direction what is required? - CORRECT ANSWER >>> A piping offset (expansion loop) (10) What size shall a bonding jumper be? - CORRECT ANSWER >>> No smaller than No. 6 copper. or No. 4 aluminum (10) Explosive limits of acetylene? - CORRECT ANSWER >>> 2.50%-81% (10) Critical point of acetylene? - CORRECT ANSWER >>> 28 psi at 21 degrees C (70 degrees F) (10) What should be the last deciding factor in the location of a gas appliance? - CORRECT ANSWER >>> The gas supply piping system (10) Which requirement governs upstream of the gas meter, gas utilities? **- CORRECT ANSWER ** CAN/CSA-Z662 Standard, Oil and gas pipeline systems

(10) What must you do differently when sizing higher pressure gas systems? - CORRECT ANSWER >>> Include proof that the measured length of of the system plus the equivalent length of the fittings do not exceed the Code zone length upon which you size the piping system (10) Purging of piping must follow engineering practices above NPS ___ **- CORRECT ANSWER

** 4 (10) What is a normal purge velocity in large piping? - CORRECT ANSWER >>> 200ft/min (10) What are the three types of lifts? - CORRECT ANSWER >>> Incidental or ordinary lift, pre- engineered lift, critical lift (10) What standard must rigging slings meet? - CORRECT ANSWER >>> ASME B30.9 Slings (10) What is the maximum acceptable reduction in wire rope diameter? **- CORRECT ANSWER ** 1/3 of the original diameter (10) Rigging hooks should not exceed what amount of wear? - CORRECT ANSWER >>> 5% in the throat opening not to exceed 1/4 inch or wear exceeding 10% of the original dimension (11) Zero Governor - CORRECT ANSWER >>> A regulator designed to deliver an outlet pressure equivalent to atmospheric pressure (11) Servo - CORRECT ANSWER >>> A mechanism set in motion by other mechanisms (11) Setpoint - CORRECT ANSWER >>> The desired outlet pressure (11) Droop and offset - CORRECT ANSWER >>> The downstream pressure drop below setpoint

(11) Pressure regulators are required to have a _______________ installed upstream. - CORRECT ANSWER >>> 5.2.1.7 and 6.18.2 require a manual shutoff valve for servicing and emergency response (11) A pressure regulator shall not be ____________. - CORRECT ANSWER >>> Bypassed (11) A regulator shall not be installed in which three locations? - CORRECT ANSWER >>> 1) Where it is inaccessible for repair, replacement, servicing, or inspection

  1. In a concealed location
  2. Where it could reasonably be expected to be subject to physical or chemical damage (11) A line pressure regulator with an inlet pressure over _________ shall be the positive shutoff type - CORRECT ANSWER >>> 0.5 psi (3.5 kPa) (11) All permanent propane installations must employ _______________. **- CORRECT ANSWER

** Two stage regulation (11) A hydrostatic relief device is required on? - CORRECT ANSWER >>> Liquid propane systems where the propane can be trapped between two valves (11) What is the minimum and maximum hydrostatic relief valve pressure? **- CORRECT ANSWER ** 375 psi minimum and 500 psi maximum (11) When venting a regulator vent outdoors, a technician must pay special attention to which Clause? - CORRECT ANSWER >>> 5.5 of CSA B149. (11) Vent lines for regulators shall be made of what material? - CORRECT ANSWER >>> Steel pipe, copper, seamless aluminum, or steel tubing that meets the standard specified in 6.

(11) Aluminum regulator vents are NOT allowed on? - CORRECT ANSWER >>> Combined vent systems with an inlet pressure over 0.5 psi (3.5 kPa) (11) The vent size for a single regulator must be at least what inside diameter? - CORRECT ANSWER >>> 0.25 inch (6mm) (11) If manufacturer instructions do not provide details on sizing of the regulator vent line how should you size the vent? - CORRECT ANSWER >>> Increase the vent line by one pipe size for every 50ft or part thereof that the vent line extends beyond 50ft (11) How must a regulator vent terminate outdoors? - CORRECT ANSWER >>> Pointing downwards and have a means to prevent entry of water, insects, or foreign material (11) Minimum clearance of a regulator vent termination from a commercial clothes dryer moisture exhaust? - CORRECT ANSWER >>> 10ft (11) Minimum clearance of a regulator vent termination from a domestic clothes dryer moisture exhaust? - CORRECT ANSWER >>> 3ft (11) Where in the CSA B149.1 can you find allowed locations for regulator vent terminations? - CORRECT ANSWER >>> Table 5.3 or Figure 1-15 on page 31 of the Unit 11 Workbook (11) Most natural gas appliances require a manifold pressure of _____ to _____ inches w.c. - CORRECT ANSWER >>> 3 to 4 (11) Most propane appliances require a manifold pressure of _____ to _____ inches w.c. - CORRECT ANSWER >>> 10 to 11

(11) What are the three methods of overpressure protection? - CORRECT ANSWER >>> Relief valve, pressure limiting, automatic shut-off (11) What are the four general types of relief valves? - CORRECT ANSWER >>> Pop-type, direct operated, pilot operated, and internal relief valves (11) The setpoint of a pop-type relief valve is adjustable by the technician. True or False? - CORRECT ANSWER >>> False, this is a safety measure that prevents tampering with the relief valve setpoint (11) The setpoint of a direct operated relief valve is adjustable by the technician. True or False? - CORRECT ANSWER >>> True (11) What are the three main elements of an internal relief valve? **- CORRECT ANSWER

** Loading element Measuring element Restricting element (11) What principle do pressure limiting devices use to achieve overpressure protection? - CORRECT ANSWER >>> Containment (11) What is a disadvantage of wide-open monitoring systems? - CORRECT ANSWER >>> The monitor is rarely exercised (11) What is Firing rate? - CORRECT ANSWER >>> Amount of heat in the combustion chamber

(11) What is standard atmospheric pressure? - CORRECT ANSWER >>> 14.73 psia or 101.325 kPa (11) Cylinders with a water capacity of 240lb or less must be inspected and recertified how often? - CORRECT ANSWER >>> Within 10 years of the date of manufacture or date or reinspection (11) The volume of a cylinder is given in pounds or kilograms of water at what temperature? - CORRECT ANSWER >>> 133 °F or 54.44 °C (11) Cylinders of what capacity manufactured after January 1, 2008 are required to have an overfill prevention device? - CORRECT ANSWER >>> 40 lb. (18.2 kg) or less (11) Liquid propane service connections usually have what type of special thread - CORRECT ANSWER >>> A right hand thread (11) What are the pressure relief valve settings for cylinders and tanks? **- CORRECT ANSWER

** Cylinders: 375 psig Tanks: 312 psig or 250 psig (11) The fixed liquid level gauge is also called? - CORRECT ANSWER >>> The bleeder valve (11) When sizing a propane container what is the most important consideration? - CORRECT ANSWER >>> The vapor or liquid withdrawal capacity (11) What are the six basic factors that affect the vaporization rate of a propane container? - CORRECT ANSWER >>> - Surface area of the tank

  • Ambient temperature

(12) What dose it mean when a breaker is 'trip-free'? - CORRECT ANSWER >>> This means the breaker cannot be prevented from tripping by holding the handle in the ON position (12) What are the two trip elements included in a most circuit breakers? **- CORRECT ANSWER

** The thermal element and the magnetic element (12) What is the interrupting capacity of standard low-voltage breakers? **- CORRECT ANSWER ** 10 kA (10 000 amperes) (12) What are three major disadvantages of using aluminum as an electrical conductor? - CORRECT ANSWER >>> It oxidizes rapidly. It is subject to electrolysis. It is prone to cold flow. (12) What is electrolysis? - CORRECT ANSWER >>> The chemical breakdown of two metals in contact reacting with one another ** A right hand thread (11) What are the pressure relief valve settings for cylinders and tanks? - CORRECT ANSWER >>> Cylinders: 375 psig Tanks: 312 psig or 250 psig (11) The fixed liquid level gauge is also called? - CORRECT ANSWER >>> The bleeder valve (11) When sizing a propane container what is the most important consideration? - CORRECT ANSWER >>> The vapor or liquid withdrawal capacity (11) What are the six basic factors that affect the vaporization rate of a propane container? - CORRECT ANSWER >>> - Surface area of the tank - Ambient temperature (12) What dose it mean when a breaker is 'trip-free'? - CORRECT ANSWER >>> This means the breaker cannot be prevented from tripping by holding the handle in the ON position (12) What are the two trip elements included in a most circuit breakers? - CORRECT ANSWER >>> The thermal element and the magnetic element (12) What is the interrupting capacity of standard low-voltage breakers? - CORRECT ANSWER >>> 10 kA (10 000 amperes) (12) What are three major disadvantages of using aluminum as an electrical conductor? - CORRECT ANSWER >>> It oxidizes rapidly. It is subject to electrolysis. It is prone to cold flow. (12) What is electrolysis? - CORRECT ANSWER >>> The chemical breakdown of two metals in contact reacting with one another (12) What is Ampacity? - CORRECT ANSWER >>> The current carrying capacity of electric conductors expressed in amperes

(12) The CE code defines low voltage circuits as those operating in what voltage range? - CORRECT ANSWER >>> 31 V to 750 V inclusive (12) In what electrical state are wiring diagrams typically drawn? - CORRECT ANSWER >>> In an "at rest" state (de-energized state) (12) What is the voltage, phase, and frequency of residential electrical service? - CORRECT ANSWER >>> 240 volts (V), single-phase, 60 hertz (240/1/60)

(12) The neutral line on a distribution panel must be grounded twice. True or False - CORRECT ANSWER >>> False, the neutral is permitted to be grounded only once. (12) Control relays are suitable for controlling single phase motors. True or False? - CORRECT ANSWER >>> False, control relays are not suited for controlling even single phase motors of any size because of high starting currents and high back currents (12) Two boxes commonly used in the installation of gas appliances and equipment are: - CORRECT ANSWER >>> Device boxes and junction boxes (12) A single thermocouple may be used to supervise inputs of natural gas appliances with inputs of up to 1 000 000 Btu/h (300 kW) if they have: - CORRECT ANSWER >>> Unrestricted vertical flue passes (12) Powerpile generators are used on appliances with which type of controls? - CORRECT ANSWER >>> Automatic-type controls (12) A thermocouple only generates a voltage when the temperature difference between the hot and cold junction is at least: - CORRECT ANSWER >>> 400 F or 204 C (12) What are the two types of Powerpiles? - CORRECT ANSWER >>> Coaxial and Two wire (12) Below what millivoltage (open circuit) should a thermocouple be replaced? - CORRECT ANSWER >>> 20 mV (Should read around 30)

(12) Which type of connection subjects the windings to higher voltage, delta or wye? - CORRECT ANSWER >>> Delta (12) Which phased motor requires a supplementary device to make it self-starting? - CORRECT ANSWER >>> A single-phase motor (12) If you must use a new capacitor that has a slightly different capacity than the old capacitor what are the parameters? - CORRECT ANSWER >>> 5%-10% over rather than under (12) At what speed do start relays remove the starting winding from the circuit? - CORRECT ANSWER >>> 75% of its normal running speed (12) What type of device is a 'Klixon disc'? - CORRECT ANSWER >>> A current sensing device (12) What are three ways coil windings are insulated? **- CORRECT ANSWER

** Varnishimpregnated paper, fiberglass, or polymers (12) What is the standard ambient temperature used for motor insulation rating purposes? - CORRECT ANSWER >>> 40 degrees Celsius ** Automatic-type controls (12) A thermocouple only generates a voltage when the temperature difference between the hot and cold junction is at least: - CORRECT ANSWER >>> 400 F or 204 C (12) What are the two types of Powerpiles? - CORRECT ANSWER >>> Coaxial and Two wire (12) Below what millivoltage (open circuit) should a thermocouple be replaced? - CORRECT ANSWER >>> 20 mV (Should read around 30) (12) Which type of connection subjects the windings to higher voltage, delta or wye? - CORRECT ANSWER >>> Delta (12) Which phased motor requires a supplementary device to make it self-starting? - CORRECT ANSWER >>> A single-phase motor (12) If you must use a new capacitor that has a slightly different capacity than the old capacitor what are the parameters? - CORRECT ANSWER >>> 5%-10% over rather than under (12) At what speed do start relays remove the starting winding from the circuit? - CORRECT ANSWER >>> 75% of its normal running speed (12) What type of device is a 'Klixon disc'? - CORRECT ANSWER >>> A current sensing device (12) What are three ways coil windings are insulated? - CORRECT ANSWER >>> Varnishimpregnated paper, fiberglass, or polymers (12) What is the standard ambient temperature used for motor insulation rating purposes? - CORRECT ANSWER >>> 40 degrees Celsius (13) What material do transistors, diodes, thyristors, and thermistors have in common? - CORRECT ANSWER >>> They all use semiconductor materials (13) What is the difference between a positive temperature coefficient and a negative temperature coefficient thermistor? - CORRECT ANSWER >>> A PTC thermistor increases resistance with increased temperature, and an NTC decreases its resistance with increased temperature

(13) What allows the passage of current in only one direction? - CORRECT ANSWER >>> A diode (13) What do digital thermostats use to measure temperature? **- CORRECT ANSWER

** Thermistor (13) What temperature is a HIGH LIMIT aquastat typically adjusted to? **- CORRECT ANSWER ** 93 degrees Celsius (200 F) (13) What are the two types of aquastat? - CORRECT ANSWER >>> Operating and High limit (13) Gas-pressure switches are required by code on a burner system that operates with gas pressures greater than? - CORRECT ANSWER >>> 1/2 psig

(13) Under what condition should a low gas-pressure switch open as per B149.3? - CORRECT ANSWER >>> If the pressure drops to 50% or less of the regulator setpoint (13) Under what condition should a high gas-pressure switch open as per B149.3? - CORRECT ANSWER >>> When the appliance regulator set point is exceeded by 25% or more (13) Approximately what percentage of flame radiation is emitted as light visible to the human eye? - CORRECT ANSWER >>> 6% (13) Approximately what percentage of flame radiation is emitted as ultraviolet light? - CORRECT ANSWER >>> 3% (13) Approximately 90% of flame radiation is what part of the light spectrum? - CORRECT

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 ANSWER >>> CSA Z (14) What is the HDL (negative inches w.c.) for an airtight woodstove or fireplace? - CORRECT ANSWER >>> 0. (14) What is the HDL (negative inches w.c.) for an oil or gas fired appliance with natural draft and dilution air - CORRECT ANSWER >>> 0. (14) What is the HDL (negative inches w.c.) for a wood or gas fireplace? **- CORRECT ANSWER

** 0. (14) What is the HDL (negative inches w.c.) for mechanical draft, any fuel fired appliance? - CORRECT ANSWER >>> 0.04 for unlined chimneys on an exterior wall, 0.06 for metal insulated of interior chimneys or sidewall vents (14) Which standard was developed to address issues and concerns that arise from the depressurization of existing houses? - CORRECT ANSWER >>> CSA F (14) How many air changes per hour are required in a dwelling if a room or space is mechanically cooled during the non-heating season? - CORRECT ANSWER >>> One-half air change per hour (14) How many air changes per hour are required in a dwelling if a room or space NOT mechanically cooled during the non-heating season? - CORRECT ANSWER >>> One air change per hour

(15) When should the inlet pressure to an appliance be measured? **- CORRECT ANSWER

** When it's firing at its rated input (15) What is the minimum size and type of wire that can be used for a 120 V, 15 A indoor appliance? - CORRECT ANSWER >>> No. 14 AWG NMD- 90 (15) Which type of flare nut is stronger short- or long-neck? - CORRECT ANSWER >>> Shortneck (15) At approximately what temperature dose a self-cleaning oven door lock? - CORRECT ANSWER >>> 650 degrees F (340 degrees C) (15) Gas hoses may only be used with what type of appliance? - CORRECT ANSWER >>> An unvented appliance (15) If a barbeque has been converted from one gas to another what must be done? - CORRECT ANSWER >>> The rating plate must be changed to indicate what type of gas the barbeque has been converted to

(15) What must be installed upstream of a quick disconnect device? **- CORRECT ANSWER

** A manual shut-off valve