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12 Cards in this Set
- Front
- Back
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What type of grease would be used to lubricate a taper plug valve or gas tap? i Graphite grease ii Silicone grease iii Bearing Grease iv Non-Setting Grease |
A. Graphite grease |
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What name is given to the valve used to turn off the supply gas to a cooker with a drop down lid? i Ball valve ii Safety cut off valve iii Pedestal valve iv Solenoid valve |
A. Safety cut off valve |
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The term CREEP in relation to a regulator refers to? i Let-by of the regulator valve when the regulator is locked up ii Let-by of the regulator valve when the regulator is working iii Variations in working pressure corresponding to varying throughputs iv A temporary reduction in working pressure caused by a significant increase in gas |
A. Let-by of the regulator valve when the regulator is locked up |
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A zero rated regulator? i Supplies gas at 0m3-1 when the air supply fan is operating ii Supplies gas at 0mbar when the air supply fan operates at max speed iii Is rated for any gas type iv Supplies gas at atmospheric pressure when the air supply operates at varying speeds |
A. Supplies gas at atmospheric pressure when the air supply operates at varying speeds |
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A liquid expansion, thermostatic valve is most likely to be found on? i Combi ii System boiler iii Gas cooker iv Gas fire |
A. Gas cooker |
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A liquid expansion, thermostaticswitch is most likely to be found on? i Warm air unit ii CH boiler iii Gas cooker iv Gas fire |
A. CH boiler |
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Flame rectification current is normally? i DC and between 10 & 35 micro amps ii AC and between 5 &10 volts iii DC and between 15 & 20 volts iv AC and between 5 & 30 micro amps |
A. AC and between 5 & 30 micro amps |
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A cooker hotplate burner is fitted with a thermo electric FSD what is the maximum time it should take to respond to flame failure? i 30 seconds ii 60 seconds iii 90 seconds iv 180 seconds |
A. 90 Seconds |
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Which of the following controls is not normally incorporated into a multifunctional valve? i Regulator ii Thermo electric FSD iii Solenoid iv Igniter |
A. Igniter |
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If the pressure sensing tubes were removed from a pressure switch and the appliance was then put into operation, then? i The fan will not run? ii There will be no attempt at ignition iii The appliance will operate as normal iv The appliance will overheat |
A. There will be no attempt at ignition |
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What control is specifically required for an open flued gas fire installed in a bedroom i ASD ii Thermo electric FSD iii Rectification (ionisation) FSD iv Carbon monoxide detector |
A. ASD |
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Interrupted thermocouple circuits are normally arranged to protect against? i Spillage of products of combustion ii overheating of the heat exchanger iii either a or b iv Vitiated atmosphere |
A. either a or b |
