Power Engineering 3A1 Review 2 questions with complete solutions graded A+

Power Engineering 3A1 Review 2 questions with complete solutions
graded A+
1. A reinforced concrete beam requires a cross-sec- C
tional area of reinforcing steel equal to 25 cm². If 2
cm diameter steel rods are used, how many will
be required?
Select one:
A. 6 rods
B. 7 rods
C. 8 rods
D. 10 rods
E. 12 rods
2. If melted, most substances: A
Select one:
A. Increase their volume
B. Decrease their volume
C. Retain their volume
D. Increase, decrease or retain their volume,
depend- ing on conditions
E. Decrease in temperature
3. The total amount of heat, in kJ, that is absorbed by A
the water/steam in a boiler in a given period of time
is called the:
Select one:
A. Heat rate
B. Factor of evaporation
C. Equivalent evaporation
D. Total enthalpy
E. Latent heat of the transformation
4. Five kilograms of water at 100°C is changed to satu- C
rated steam having a final temperature of 120°C. Cal-
culate the total amount of heat required in changing
the water to steam.
Select one:
A. 2287.26 kJ
B. 2706.3 kJ
C. 11,436 kJ


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, Power Engineering 3A1 Review 2 questions with complete solutions
graded A+
D. 13,531.5 kJ
E. 17,138 kJ
5. An electron has: A
Select one:
A. A negative electrical charge
B. A positive electrical charge
C. No electrical charge
D. A mass of one
E. A mass equal to the proton
6. A kilomol of a substance is an amount equal to its B
in kilograms.
Select one:
A. Number of protons
B. Molecular mass
C. Number of neutrons
D. Balanced mass
E. Atomic number
7. Valance electrons are defined as electrons that are:

D Found in the outermost energy levels of an atom.
Balanced with the protons to give the atom a neutral
electrical charge.
The electrons that are involved in chemical reactions.
The electrons closest to the nucleus.
Select one:
A. 1, 2
B. 2, 3
C. 3, 4
D. 1, 3
E. 2, 4
8. The material balance table provides the: D
Select one:
A. Material specifications that the piping and
vessels are constructed of
B. Heat balance across the plant
C. Volume of process products that will be
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, Power Engineering 3A1 Review 2 questions with complete solutions
graded A+
produced across the plant




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, Power Engineering 3A1 Review 2 questions with complete solutions
graded A+
D. Pressure, temperature, composition and flow
rates of the various process streams
E. Assurance that the mass of the materials is
evenly distributed
9. The absolute temperature equivalent of 30°C is: D
Select one:
A. -30 K
B. 86°F
C. 86°R
D. 303 K
E. 672°R
10. Specialty steels for construction of bridges, boilers

D and ships are refined in an oxygen furnace
because: Select one:
A. It reduces the time needed to produce the steel
B. The high temperatures reduce the amount of
alloy elements needed to strengthen the steel
C. The high temperature produces steel with a
very fine grain structure
D.This method reduces impurities and gives the
steel greater strength
E. The slow operation gives advantages over
other processes.
11. Work done in a cylinder at constant pressure can be E
defined using the formulas:
1. Work Done (J) = Pressure (kPa) x Area (m²)
2. Work Done (J) = Pressure (kPa) x Area (m²) x
Dis- tance (m)
3. Work Done (J) = Force (N) x Area (m²)
4. Work Done (J) = Force (N) x Distance (m) the
force moves
Select one:
A. 1, 2
B. 2, 3
C. 3, 4

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