POWER ENGINEERING 3A1 REVIEW 2025 LATEST
QUESTIONS & ANSWERS RATED 100% CORRECT!!
A butane molecule is a straight chain hydrocarbon molecule with the following
chemical formula:
Select one:
A. C4H10
B. C3H8
C. C3H10
D. C4H8
E. C3H10 Answer - A
Reflex angles are greater than:
Select one:
A. 45 degrees
B. 90 degrees
C. 120 degrees
D. 180 degrees
E. 270 degrees. Answer - D
A word that refers to the change in the position of a body, relative to some
reference point is:
Select one:
A. Magnitude
,B. Displacement
C. Direction
D. Distance
E. Velocity Answer - B
Correct term for any change of phase from a liquid to a vapor is:
Select one:
A. Boiling
B. Evaporation
C. Boiling point
D. Vaporization
E. Fusion Answer - B
Boyle's Law is one of constant:
Select one:
A. Mass
B. Volume
C. Pressure
D. Temperature
E. Flow Answer - D
A steam engine has a piston 20 cm in diameter and a piston rod of 4 cm
diameter. If the ultimate strength for the rod material is 400,000 kPa and the
factor of safety for the rod is 12 then calculate the maximum allowable steam
pressure.
Select one:
A. 1,333 kPa
,B. 1.333 GPa
C. 3333 kPa
D. 6031.87 kPa
E. 192,000 kPa Answer - A
If 1.45 m³ of air at 100 kPa abs and 12°C is compressed to 950 kPa abs while
following the law PV1.34 = C. Taking R for air = 0.287 kJ/kg K, find the final
volume of air and the mass of air compressed.
Select one:
A. V2 = 0.27 m³ and mass = 1.77 kg
B. V2 = 0.42 m³ and mass = 3.55 kg
C. V2 = 0.27 m³ and mass = 42.1 kg
D. V2 = 0.42 m³ and mass = 57.5 kg
E. V2 = 0.42 m³ and mass = 42.1 kg Answer - A
The amount of heat required to convert 10 kg of water at 60°C into dry
saturated steam at 200 kPa is:
Select one:
A. 2455.57 kJ
B. 2511.3 kJ
C. 2706.7 kJ
D. 24,555.7 kJ
E. 27,067 kJ Answer - D
In the following triangle, what is the value of tan A ?
Select one:
A. 1.33
, B. 0.80
C. 0.75
D. 0.6
E. 1.67 Answer - A
The ratio of the amount of heat absorbed per kg of steam in the boiler, to the
amount of heat absorbed in producing 1 kg of steam at 100°C from water at
100°C is called the:
Select one:
A. Dryness fraction
B. Equivalent evaporation
C. Factor of evaporation
D. Efficiency of steam generation
E. Latent heat of fusion Answer - C
In the given triangle, calculate the ratio of BC to AC, when angle ADC = 40
degrees, angle BDC = 20 degrees, angle ACD = 90 degrees, and side DC = 8m.
Select one:
A. 0.351
B. 0.362
C. 0.434
D. 0.474
E. 0.5. Answer - C
Generally, the boiling point of a hydrocarbon compound will:
Select one:
QUESTIONS & ANSWERS RATED 100% CORRECT!!
A butane molecule is a straight chain hydrocarbon molecule with the following
chemical formula:
Select one:
A. C4H10
B. C3H8
C. C3H10
D. C4H8
E. C3H10 Answer - A
Reflex angles are greater than:
Select one:
A. 45 degrees
B. 90 degrees
C. 120 degrees
D. 180 degrees
E. 270 degrees. Answer - D
A word that refers to the change in the position of a body, relative to some
reference point is:
Select one:
A. Magnitude
,B. Displacement
C. Direction
D. Distance
E. Velocity Answer - B
Correct term for any change of phase from a liquid to a vapor is:
Select one:
A. Boiling
B. Evaporation
C. Boiling point
D. Vaporization
E. Fusion Answer - B
Boyle's Law is one of constant:
Select one:
A. Mass
B. Volume
C. Pressure
D. Temperature
E. Flow Answer - D
A steam engine has a piston 20 cm in diameter and a piston rod of 4 cm
diameter. If the ultimate strength for the rod material is 400,000 kPa and the
factor of safety for the rod is 12 then calculate the maximum allowable steam
pressure.
Select one:
A. 1,333 kPa
,B. 1.333 GPa
C. 3333 kPa
D. 6031.87 kPa
E. 192,000 kPa Answer - A
If 1.45 m³ of air at 100 kPa abs and 12°C is compressed to 950 kPa abs while
following the law PV1.34 = C. Taking R for air = 0.287 kJ/kg K, find the final
volume of air and the mass of air compressed.
Select one:
A. V2 = 0.27 m³ and mass = 1.77 kg
B. V2 = 0.42 m³ and mass = 3.55 kg
C. V2 = 0.27 m³ and mass = 42.1 kg
D. V2 = 0.42 m³ and mass = 57.5 kg
E. V2 = 0.42 m³ and mass = 42.1 kg Answer - A
The amount of heat required to convert 10 kg of water at 60°C into dry
saturated steam at 200 kPa is:
Select one:
A. 2455.57 kJ
B. 2511.3 kJ
C. 2706.7 kJ
D. 24,555.7 kJ
E. 27,067 kJ Answer - D
In the following triangle, what is the value of tan A ?
Select one:
A. 1.33
, B. 0.80
C. 0.75
D. 0.6
E. 1.67 Answer - A
The ratio of the amount of heat absorbed per kg of steam in the boiler, to the
amount of heat absorbed in producing 1 kg of steam at 100°C from water at
100°C is called the:
Select one:
A. Dryness fraction
B. Equivalent evaporation
C. Factor of evaporation
D. Efficiency of steam generation
E. Latent heat of fusion Answer - C
In the given triangle, calculate the ratio of BC to AC, when angle ADC = 40
degrees, angle BDC = 20 degrees, angle ACD = 90 degrees, and side DC = 8m.
Select one:
A. 0.351
B. 0.362
C. 0.434
D. 0.474
E. 0.5. Answer - C
Generally, the boiling point of a hydrocarbon compound will:
Select one:
