Steam Boilers Module 15 Session 9 Flashcards
1
Q
The temperature at which fuel oil will give off a vapor that will ignite readily when exposed to an open flame is its \_\_\_\_\_\_\_\_\_\_\_\_ point. A. Flash B. Fire C. Pour D. Viscosity
A
A. Flash
2
Q
In order to determine the heating value of coal in Btu per pound, the ____________.
A. Proximate analysis is used
B. Ultimate analysis is used
C. Percentage of volatile matter is needed
D. Rank of coal is needed
A
C. Percentage of volatile matter is needed
3
Q
The temperature at which fuel oil will give off a vapor that burns continuously is its \_\_\_\_\_\_\_\_\_\_\_\_ point. A. Flash B. Fire C. Pour D. Viscosity
A
B. Fire
4
Q
Rank refers to the \_\_\_\_\_\_\_\_\_\_\_\_ of the coal. A. Ash content B. Btu content C. Clinker formation D. Degree of hardness
A
D. Degree of hardness
5
Q
Grade refers to the \_\_\_\_\_\_\_\_\_\_\_\_ of the coal A. Size, heating value, and ash content B. Size only C. Clinker formation D. Degree of hardness
A
A. Size, heating value, and ash content
6
Q
A proximate analysis of coal provides information regarding its \_\_\_\_\_\_\_\_\_\_\_\_ content. A. Moisture B. Oxygen C. Carbon D. Sulfur
A
A. Moisture
7
Q
An ultimate analysis of coal provides information regarding \_\_\_\_\_\_\_\_\_\_\_\_. A. Elements present in the coal B. Moisture content C. Volatile matter D. Fixed carbon and ash content
A
A. Elements present in the coal
8
Q
Bituminous coal has a high \_\_\_\_\_\_\_\_\_\_\_\_ content A. Lignite B. Fixed carbon Q. Moisture D. Volatile
A
D. Volatile
9
Q
Anthracite coal has a high \_\_\_\_\_\_\_\_\_\_\_\_ content. A. Lignite B. Carbon C. Moisture D. Volatile
A
B. Carbon
10
Q
When the temperature of fuel oil is raised, its viscosity \_\_\_\_\_\_\_\_\_\_\_\_. A. Remains the same B. Is raised C. Is lowered D. Cannot be affected by heat
A
C. Is lowered
11
Q
The lowest temperature at which fuel oil will flow is its \_\_\_\_\_\_\_\_\_\_\_\_ point. A. Flash B Fire C. Pour D. Viscosity
A
C. Pour
12
Q
Fuel oil with a low flash point would be ____________.
A. Desirable to use
B. Used only in high pressure plants
C. Used in either high or low pressure plants
D. Dangerous to use
A
D. Dangerous to use
13
Q
Which type of coal is most likely to have problems with spontaneous combustion when being stockpiled? A. Lignite B. Anthracite C. Bituminous D. Anthracite stoker
A
C. Bituminous
14
Q
Which type of fire extinguisher is the correct type to use on fuel oil fires? A. Foam or dry chemical B. Soda water C. Carbon tetrachloride D. Feedwater
A
A. Foam or dry chemical
15
Q
Which weight of fuel oil must be heated to reach the required temperature for combustion? A. No. 2 B. No. 3 C. No. 6 D. No. 10
A
C. No. 6
16
Q
Higher numbered fuel oils produce \_\_\_\_\_\_\_\_\_\_\_\_ lower numbered fuel oils. A. More Btu per gallon than B. Less Btu per gallon than C. The same amount of Btu as D. One-half the Btu of
A
A. More Btu per gallon than
17
Q
Air that controls the rate of combustion is \_\_\_\_\_\_\_\_\_\_\_\_ air. A. Control B. Excess C. Secondary D. Primary
A
D. Primary
18
Q
Air that controls the combustion efficiency is \_\_\_\_\_\_\_\_\_\_\_\_ air. A. Control B. Excess C. Secondary D. Primary
A
C. Secondary
19
Q
Air supplied to the burner that is more than the theoretical amount needed to burn fuel is \_\_\_\_\_\_\_\_\_\_\_\_ air. A. Control B. Excess C. Secondary D. Primary
A
B. Excess
20
Q
Which type of combustion is when all fuel is burned using only the theoretical amount of air supplied? A. Complete B. Incomplete C. Perfect D. Theoretical
A
C. Perfect
21
Q
Which type of combustion is when all the fuel is burned using the minimal amount of excess air? A. Complete B. Incomplete C. Perfect D. Theoretical
A
A. Complete
22
Q
Gases of combustion that come in contact with the boiler heating surface before combustion is completed cause a(n) \_\_\_\_\_\_\_\_\_\_\_\_. A. Loss of draft B. Increase in chimney temperature C. Formation of soot and smoke D. Increase in heat transfer
A
C. Formation of soot and smoke
23
Q
Air needed for the combustion of fuel is made up of approximately \_\_\_\_\_\_\_\_\_\_\_\_ % oxygen and \_\_\_\_\_\_\_\_\_\_\_\_ % nitrogen. A. 80; 20 B. 21; 79 C. 50; 50 D.30; 70
A
B. 21; 79
24
Q
Carbon dioxide (CO2) in the flue gas indicates \_\_\_\_\_\_\_\_\_\_\_\_. A. Complete combustion B. Incomplete combustion C. A high chimney temperature D. Perfect combustion
A
A. Complete combustion
25
Q
Carbon monoxide (CO) in the flue gas indicates \_\_\_\_\_\_\_\_\_\_\_\_. A. Complete combustion B. Incomplete combustion C. A low chimney temperature D. Complete combustion
A
B. Incomplete combustion
26
Q
The heating value of a fuel is expressed in \_\_\_\_\_\_\_\_\_\_\_\_. A. Specific Gravity B. Fire Point Units C. Viscosity D. British thermal units
A
D. British thermal units
