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gas tech II Exam.
Exam of 17 pages for the course WGU - D291 Pre-Assessment Review Learning Experien at WGU - D291 Pre-Assessment Review Learning Experien (gas tech II Exam.)
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gas tech II Exam1) What is the minimum diameter of a pressure gauge needed to perform leak test on
gas piping? - ANS-3"
2) Amp meter can read what? - ANS-Conductor magnetic field.
3) What would be the primary voltage of a furnace? - ANS-120/1/60.
4) What is the function of an intermittent pilot? - ANS-Stay on during the main burner
operation.
5) What is the millivolts power output on a thermocouple closed circuit test? - ANS-10 to
15 millivolts.
6) A pilot with a lazy yellow flame would indicate? - ANS-Orifice size too large.
7) For flame rectification one of the most important things should be? - ANS-Proper
grounding plane.
8) What makes a flame capillary sensor tube prove pilot to main gas valve? - ANS-Pilot
flame.
9) Since 1996 the most common type of home construction? - ANS-Platform.
10) Can a new installation of a fin type pool heater less than 250,000 btu be installed in
a house? - ANS-Yes, if pool heater is direct vented.
11) When converting oil furnace to gas what type of atmospheric burner can be use? -
ANS-Inshot.
12) If the flue gases are remove from the front of the appliance we could assume that
it's a? - ANS-2 to 4 flue pasts boiler.
13) Can a gas log set be installed in sleeping quarters? - ANS-Yes, if approved by the
manufacturer. See clause 7.24.4(c).
,14) What is the minimum distance that a vent from an appliance with an input of
110,000 btuh can be from a non-mechanical air supply? - ANS-3ft
15) If the boiler flue gases are remove from the front of the appliance we could assume
that it's a? - ANS-2 to 4 flue pass boiler.
16) Can a gas log fire place be installed in a sleeping quarter? - ANS-No, even if new
venting is installed.
17) What is the minimum distance that a vent from an appliance with an input of
101,000 btuh be from a non-mechanical air supply? - ANS-3ft
18) On a presssuretol, the main burner starts on? - ANS-Pressure differential.
19) On a hydronic heater system what control respond to a load change? -
ANS-Aquastat.
20) Installation of a propane tank under 1000 USWG what would be the minimum
distance from a regulator to a building opening? - ANS-3'
21) If an appliance is less than 85% efficient and non positive it would be considered a?
- ANS-Category 2.
22) For a steam boiler what would be the most important safety control? - ANS-Low
water cut off.
23) For a low pressure steam boiler what would be the maximum steam pressure
setting? - ANS-15psi
24) What would be the minimum distance from a gas meter a dryer vent should
terminate? - ANS-3'
25) A appliance draft hood ensures? - ANS-Zero over fire draft.
26) Proper wiring of an electronic air cleaner is? - ANS-Parallel with appliance blower
fan.
27) How would you measure humidity? - ANS-Wet bulb and dry bulb.
, 28) Which heat is removed or added to cause a change in state without change in
temperature? - ANS-Latent heat.
29) What is nitrogen known as? - ANS-Inert gas.
30) Except when permitted what is the minimum clearance to combustible from the top
of the gas refrigerator? - ANS-12"
31) On a gas regulator what controls the increase or decrease of gas flow to the
appliance? - ANS-Restricting element.
32) When sizing capacitors in series, what would be the total capacitance with 12MFD
and 15MFD capacitors? - ANS-6.66 CT = C1 x C2 / C1 + C2
33) What would be the BTU output of a 10 KW heater - ANS-34120
34) Clocking a 5 foot dial on a gas meter for 63 seconds, what would be the appliance
input? - ANS-286,000 BTU
35) What is the sole purpose of an EAC? - ANS-To remove dust, dirt and smoke.
36) What does a gas pressure regulator control? - ANS-Controls downstream pressure.
37a) What is the output pressure from a first stage propane regulator? - ANS-10 PSI
37b) What is the relief valve setting on a propane tank (Pressure Vessel)? - ANS-250
PSI
37c) What is the relief valve setting on a propane cylinder (BBQ)? - ANS-375 PSI
38) On a regulator what measures outlet pressure? - ANS-Measuring element.
39) Which gas meter would be used for a small or mid size commercial installation? -
ANS-Bellow type.
40) A fan assist burner is? - ANS-Designed to overcome burner resistance.
41) A propane service regulator would normally deliver pressure at? - ANS-Pound to 11"
wc
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