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22 Cards in this Set
- Front
- Back
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The reducing of oil into very small particles is termed
a) fluidization b) fractionation c) turbulence d) atomization e) distillation |
D
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Before atomization can occur, heavy oils are heated to approximately a) 203 degrees C b) 95 degrees C c) 115 degrees C d) 75 degrees C e) 150 degrees C |
B
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An air atomizing burner utilizes an air pressure of approximately a) 15 kPa b) 150 kPa c) 75 kPa d) 95 kPa e) 100 kPa |
E
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An air atomizing compressor is usually a) a variable displacement type b) a centrifugal type c) an axial type d) a positive displacement type e) a regenerative type |
D
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The capacity of a constant capacity mechanical atomizer is a function of a) orifice size b) pump speed c) pump size d) supply pressure e) oil viscosity |
A
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A modulating pressure atomizer has its return oil flow regulated by a) a modulating valve to the burner b) a modulating valve in the return line c) a solenoid valve in the return line d) a temperature control valve to the burner e) pump speed |
B
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To which of the following oil burners is the oil supplied under high pressure? a) mechanical atomizing burner b) air atomizing burner c) rotary cup burner d) steam atomizing burner e) multi-spud burner |
A
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When using mechanical fuel oil atomization a) 70 kPa steam pressure is required at the burner b) 35 to 40 kPa oil pressure is required c) high pump pressure is required d) steam pressure is required to keep the bypass open e) dry saturated steam or superheated steam should be used |
C
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Oil burners can be divided into three classes: 1. air and steam atomizing burners 2. mechanical or pressure atomizing burners 3. centrifugal or rotary cup burners 4. atmospherical pressure burners 5. gravitational pressure burners a) 1, 2, and 3 b) 1, 2, and 4 c) 2, 3, and 4 d) 3, 4, and 5 e) 2, 3, and 5 |
A
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The compressed air used as atomizing air in the air atomizing oil burner is also called a) secondary air b) primary air c) pre-mixed air d) pre-compressed air e) post-copressed air |
B
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The two basic varieties of mechanical atomizing oil burners are: 1. variable capacity burner 2. constant capacity burner 3. modulating burner 4. stationary burner a) 1 and 3 b) 2 and 3 c) 3 and 4 d) 1 and 5 e) 4 and 5 |
B
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A multi-burner cluster has secondary and tertiary nozzles ignited by a) an igniter spark b) an intermittent pilot flame c) an interrupted pilot d) the primary burner e) a continuous pilot |
D
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When a greater than normal amount of combustible mixture is ignited the result may be a) a boiler explosion b) a puff-back c) a negative furnace pressure d) a too rapid boiler warm-up e) liquid fuel entering the furnace |
B
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A fuel filter consists of a) a cartridge b) wool felt c) three main parts d) a Y-strainer e) a canister |
C
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Burner light oil supply pressure range is approximately a) 50 to 100 kPa b) 150 to 250 kPa c) 300 to 550 kPa d) 550 to 700 kPa e) 700 to 850 kPa |
D
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A relief valve is placed on the discharge of a fuel oil pump a) because the pump is a dynamic type b) so burner design pressure is not exceeded c) so burner capacity is maintained d) to prevent pump rupture e) to prevent over-firing of the boiler |
B
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A time delay oil valve a) opens when the pump starts b) opens once ignition is verified c) opens on flame failure d) is located on the return line e) is upstream of the pressure regulating valve |
B
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In order to prevent the possibility of a furnace explosion it is important that the furnace is __________ before the igniter is energized and fuel is supplied to the burner nozzle(s). a) pre-heated b) post-heated c) purged d) cooled e) pressurized |
C
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Intermediate and high fire burner nozzles have higher capacities than the primary burner nozzle a) to give greater firing variations b) to prevent pressure surges c) to prevent ignition puff-backs d) because of the pump being of the positive displacement type e) to allow better boiler warm-ups |
E
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Oil flow rate to a modulating burner is regulated by a) a return line modulating valve b) a PRV on the burner line c) pump speed d) pump capacity e) firing rate |
A
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The minimum distance from furnace to oil storage tank is a) 7 m b) 5.2 m c) 2.1 m d) 4.7 m e) 9.8 m |
C
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Maximum static pressure in a fuel oil line is approximately a) 10 kPa b) 15 kPa c) 80 kPa d) 35 kPa e) 70 kPa |
E
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