OBT3 6 & 10 And Ch. 7 & 11 Final
Exam with Guaranteed Pass
Solutions.
As the ratio of carbon to hydrogen atoms increases in comparing hydrocarbon molecules then
the heavier the molecule, the slower it burns and the more heat per volume it produces
Select one:
True
False - Answer true
Approximately 96% to 99.75% of fuel oil is composed of:
Select one:
a.
methane and propane
b.
sulphur, oxygen and nitrogen
c.
hydrogen and carbon
d.
manufactured oil - Answer hydrogen and carbon
The minimum flash point of No. 2 fuel oil allowed by Standard is:
Select one:
a.
38°C (100°F)
b.
68°C (155°F)
c.
150°C (300°F)
d.
100°C (212°F) - Answer 38C (100F)
A fuel oil with a high temperature cloud point may cause:
Select one:
,a.
Excessive corrosion of the appliance and vent
b.
The fuel oil to flow faster through the nozzle
c.
Filters, fuel lines or burner parts to become clogged with wax when the fuel is cold
d.
Filters, fuel lines or burner parts to become clogged with clouds when the fuel is hot - Answer
filters, fuel lines, or burner parts to become clogged with wax when fuel is cold
Smoke and soot produced by the combustion of oil are unburnt ______ (carbon or hydrogen)
atoms which indicates that __________ (complete or incomplete) combustion is occurring. -
Answer carbon & incomplete
Excess air is necessary for complete combustion of fuel oil
Select one:
True
False - Answer true
The ultimate CO2 from the combustion of No.2 fuel oil and air is:
Select one:
a.
11.9%
b.
15.3%
c.
25.6%
d.
9.9% - Answer 15.3%
What are some of the symptoms of carbon monoxide poisoning?
Select one:
a.
Headaches, nausea, dizziness
b.
Disorientation, rapid heart rate, blue lips
,c.
Death
d.
All of the available choices - Answer all of the above
The products of complete combustion of fuel oil and air are:
Select one:
a.
Carbon monoxide
b.
Carbon trioxide
c.
Carbon dioxide
d.
Soot - Answer carbon dioxide
What is the approximate composition of air?
Select one:
a.
21% oxygen and 79% nitrogen
b.
16% oxygen and 84% nitrogen
c.
79% oxygen and 21% nitrogen
d.
50% oxygen and 50% nitrogen - Answer 21% oxygen & 79% nitrogen
The lowest temperature at which a fuel oil will vapours will first ignite when exposed to an open
flame, this is what? - Answer flash point
The lowest temperature at which fuel oil will ignite and maintain a continuous flame - Answer
fire point
The lowest temperature at which a fuel oil will barely flow - Answer pour point
, The lowest temperature at which a fuel oil will start to form wax crystals - Answer cloud point
The types of hydrocarbon molecules found in the lighter fuel oils are less complex and easier to
break apart during combustion compared to the hydrocarbon molecules found in the heavier
fuel oils
Select one:
True
False - Answer true
Colour and odour are reliable indicators of the properties and qualities of fuel oil
Select one:
True
False - Answer false
The most common grade of fuel oil used in residential and light commercial appliances is:
Select one:
a.
Kerosene
b.
No. 1 fuel oil
c.
No. 2 fuel oil
d.
No. 4 fuel oil - Answer No. 2 fuel oil
The appearance of a fuel oil flame, specifically its colour and soot production, is the best
indicator of the quality of the combustion process.
Select one:
True
False - Answer false
Liquid fuel oil will burn
Select one:
True
False - Answer false
Exam with Guaranteed Pass
Solutions.
As the ratio of carbon to hydrogen atoms increases in comparing hydrocarbon molecules then
the heavier the molecule, the slower it burns and the more heat per volume it produces
Select one:
True
False - Answer true
Approximately 96% to 99.75% of fuel oil is composed of:
Select one:
a.
methane and propane
b.
sulphur, oxygen and nitrogen
c.
hydrogen and carbon
d.
manufactured oil - Answer hydrogen and carbon
The minimum flash point of No. 2 fuel oil allowed by Standard is:
Select one:
a.
38°C (100°F)
b.
68°C (155°F)
c.
150°C (300°F)
d.
100°C (212°F) - Answer 38C (100F)
A fuel oil with a high temperature cloud point may cause:
Select one:
,a.
Excessive corrosion of the appliance and vent
b.
The fuel oil to flow faster through the nozzle
c.
Filters, fuel lines or burner parts to become clogged with wax when the fuel is cold
d.
Filters, fuel lines or burner parts to become clogged with clouds when the fuel is hot - Answer
filters, fuel lines, or burner parts to become clogged with wax when fuel is cold
Smoke and soot produced by the combustion of oil are unburnt ______ (carbon or hydrogen)
atoms which indicates that __________ (complete or incomplete) combustion is occurring. -
Answer carbon & incomplete
Excess air is necessary for complete combustion of fuel oil
Select one:
True
False - Answer true
The ultimate CO2 from the combustion of No.2 fuel oil and air is:
Select one:
a.
11.9%
b.
15.3%
c.
25.6%
d.
9.9% - Answer 15.3%
What are some of the symptoms of carbon monoxide poisoning?
Select one:
a.
Headaches, nausea, dizziness
b.
Disorientation, rapid heart rate, blue lips
,c.
Death
d.
All of the available choices - Answer all of the above
The products of complete combustion of fuel oil and air are:
Select one:
a.
Carbon monoxide
b.
Carbon trioxide
c.
Carbon dioxide
d.
Soot - Answer carbon dioxide
What is the approximate composition of air?
Select one:
a.
21% oxygen and 79% nitrogen
b.
16% oxygen and 84% nitrogen
c.
79% oxygen and 21% nitrogen
d.
50% oxygen and 50% nitrogen - Answer 21% oxygen & 79% nitrogen
The lowest temperature at which a fuel oil will vapours will first ignite when exposed to an open
flame, this is what? - Answer flash point
The lowest temperature at which fuel oil will ignite and maintain a continuous flame - Answer
fire point
The lowest temperature at which a fuel oil will barely flow - Answer pour point
, The lowest temperature at which a fuel oil will start to form wax crystals - Answer cloud point
The types of hydrocarbon molecules found in the lighter fuel oils are less complex and easier to
break apart during combustion compared to the hydrocarbon molecules found in the heavier
fuel oils
Select one:
True
False - Answer true
Colour and odour are reliable indicators of the properties and qualities of fuel oil
Select one:
True
False - Answer false
The most common grade of fuel oil used in residential and light commercial appliances is:
Select one:
a.
Kerosene
b.
No. 1 fuel oil
c.
No. 2 fuel oil
d.
No. 4 fuel oil - Answer No. 2 fuel oil
The appearance of a fuel oil flame, specifically its colour and soot production, is the best
indicator of the quality of the combustion process.
Select one:
True
False - Answer false
Liquid fuel oil will burn
Select one:
True
False - Answer false
