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Chapter 91-Oil Burners for Heating Boilers Exam Questions with Answers
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Chapter 91-Oil Burners for HeatingBoilers Exam Questions with Answers
The reducing of oil into very small particles is termed
a) atomization.
b) fractionation.
c) turbulence.
d) fluidization. - -a
-A multi -burner cluster has secondary and tertiary nozzles ignited by
a) an igniter spark.
b) an intermittent pilot flame.
c) the primary burner.
d) an interrupted pilot. - -c
-Intermediate and high fire burner nozzles may have higher capacities than
the primary burner nozzle to
a) give greater firing variations.
b) prevent pressure surges.
c) prevent ignition puff -backs.
d) allow better warm ups - -d
-When using mechanical fuel oil atomization,
a) 70 kPa steam pressure is required at the burner.
b) 35 kPa oil pressure is required.
c) high pump pressure is required.
d) steam pressure is required to keep the bypass open. - -c
-In order to burn heavy oils, they must be heated to approximately ________
ºC before they can be properly atomized.
a) 65
b) 75
c) 95
d) 50 - -c
-The fuel oil supply pressure in a modulating burner and pilot system is
approximately
a) 950 kPa.
b) 1500 kPa.
c) 1380 kPa.
d) 2000 kPa. - -c
-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
-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
-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
-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
-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
-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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