Power Engineering 3A1 Review Questions With Complete
Solutions
E
The tension test is used to determine:
1. The amount of abrasion and wear a material will withstand
without failure
2. The mechanical behavior of materials under static loads
3. The ability of a material to be cut and welded
4. The elastic properties of a material
Select one:
A. 1, 2
B. 2, 3
C. 3, 4
D. 1, 3
E. 2, 4
B
150°F is equivalent to:
Select one:
A. 51.3°C
B. 65.6°C
C. 101.1°C
D. 212.4°C
E. 302°C
A
,Find the characteristic constant for a gas if 112 kg of the gas has
a volume of 5.7 m³ at 1500 kPa absolute and 27.5°C.
Select one:
A. 0.254 kJ/kg K
B. 0.261 kJ/kg K
C. 0.271 kJ/kg K
D. 0.274 kJ/kg K
E. 0.291 kJ/kg K
A
Referring to the triangle ABC below, the ratio of opposite
side/hypotenuse for angle B is called the:
Select one:
A. Sine of angle B or Sin B
B. Cosine of angle B or Cos B
C. Secant of angle B or Sec B
D. Tangent of angle B or Tan B
E. Cotangent of angle B or Cot B.
C
A jib crane is shown carrying a load of 1000 kg. Find the force
in the jib by calculation.
Select one:
A. 4.905 kN
B. 5.0 kN
C. 11.33 kN
,D. 19.62 kN
E. 226.56 kN
A
If we find the maximum load applied to a sample being
subjected to an ultimate tensile strength test, and know the
cross-sectional area of the sample prior to testing, we can
calculate the ultimate tensile strength of the sample by:
Select one:
A. Dividing the original cross-sectional area into the maximum
load applied
B. Multiplying the original cross-sectional area by the maximum
load applied
C. Dividing the final cross-sectional area by the maximum load
applied
D. Dividing the original cross-sectional area by the maximum
load applied and multiplying by the cross-sectional area found at
the break
E. Dividing the original cross-sectional area into the minimum
load applied
C
The figure below shows a hydraulic jack system used for
hoisting cars. Assuming the pressure of the air is equal to the
pressure on the piston, the piston diameter of 27.5 cm, and the
pressure value of 600 kPa that compressor can generate, what is
the maximum load (in Newtons) the piston can raise?
Select one:
, A. 35.64 N
B. 61.16 N
C. 35.64 kN
D. 41.58 kN
E. 142.55 kN
E
A 5000 litre oil tank contains 60 litres of water. If the water is
drained off and replaced with fresh oil of relative density 0.95,
what is the change in the mass of the tank's contents?
Select one:
A. 4940 kg
B. 4750 kg
C. 60 kg
D. 5 kg
E. 3 kg
A
In a neutral atom the number of protons equals the number of:
Select one:
A. Electrons, therefore the electrical charge within the atom is
balanced
B. Neutrons, therefore the electrical charge within the atom is
balanced
C. Electrons, although the neutrons tend to cancel out the
positive charge giving the atom an overall negative charge
D. Neutrons and electrons within the atom in every case
E. Atoms in the molecule
C
Solutions
E
The tension test is used to determine:
1. The amount of abrasion and wear a material will withstand
without failure
2. The mechanical behavior of materials under static loads
3. The ability of a material to be cut and welded
4. The elastic properties of a material
Select one:
A. 1, 2
B. 2, 3
C. 3, 4
D. 1, 3
E. 2, 4
B
150°F is equivalent to:
Select one:
A. 51.3°C
B. 65.6°C
C. 101.1°C
D. 212.4°C
E. 302°C
A
,Find the characteristic constant for a gas if 112 kg of the gas has
a volume of 5.7 m³ at 1500 kPa absolute and 27.5°C.
Select one:
A. 0.254 kJ/kg K
B. 0.261 kJ/kg K
C. 0.271 kJ/kg K
D. 0.274 kJ/kg K
E. 0.291 kJ/kg K
A
Referring to the triangle ABC below, the ratio of opposite
side/hypotenuse for angle B is called the:
Select one:
A. Sine of angle B or Sin B
B. Cosine of angle B or Cos B
C. Secant of angle B or Sec B
D. Tangent of angle B or Tan B
E. Cotangent of angle B or Cot B.
C
A jib crane is shown carrying a load of 1000 kg. Find the force
in the jib by calculation.
Select one:
A. 4.905 kN
B. 5.0 kN
C. 11.33 kN
,D. 19.62 kN
E. 226.56 kN
A
If we find the maximum load applied to a sample being
subjected to an ultimate tensile strength test, and know the
cross-sectional area of the sample prior to testing, we can
calculate the ultimate tensile strength of the sample by:
Select one:
A. Dividing the original cross-sectional area into the maximum
load applied
B. Multiplying the original cross-sectional area by the maximum
load applied
C. Dividing the final cross-sectional area by the maximum load
applied
D. Dividing the original cross-sectional area by the maximum
load applied and multiplying by the cross-sectional area found at
the break
E. Dividing the original cross-sectional area into the minimum
load applied
C
The figure below shows a hydraulic jack system used for
hoisting cars. Assuming the pressure of the air is equal to the
pressure on the piston, the piston diameter of 27.5 cm, and the
pressure value of 600 kPa that compressor can generate, what is
the maximum load (in Newtons) the piston can raise?
Select one:
, A. 35.64 N
B. 61.16 N
C. 35.64 kN
D. 41.58 kN
E. 142.55 kN
E
A 5000 litre oil tank contains 60 litres of water. If the water is
drained off and replaced with fresh oil of relative density 0.95,
what is the change in the mass of the tank's contents?
Select one:
A. 4940 kg
B. 4750 kg
C. 60 kg
D. 5 kg
E. 3 kg
A
In a neutral atom the number of protons equals the number of:
Select one:
A. Electrons, therefore the electrical charge within the atom is
balanced
B. Neutrons, therefore the electrical charge within the atom is
balanced
C. Electrons, although the neutrons tend to cancel out the
positive charge giving the atom an overall negative charge
D. Neutrons and electrons within the atom in every case
E. Atoms in the molecule
C
