Power Engineering 4A - Unit 1 - g8 g8 g8 g8 g8 g8
Elementary mechanics and dynamics
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What is the power required to apply a 200kN force over
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a distance of 15m in 15 seconds?
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Select one: g8
a. 3000 W
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b. 1500 kW
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c. 1000 kW
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d. 200 kW - correct answer✔ ✔ D
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A 7m long bar is pivoted at 2m from the left end. A for
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ce of 60N is applied downwards on the left end and a f
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orce of 20N is applied downward on the right end. Wha
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t would be the clockwise and counter-
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clockwise moments about the pivot, due to each force, a
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nd in which direction would the bar rotate?
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Select one: g8
a. 120Nm counter-
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clockwise, 100Nm clockwise, clockwise rotation.
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,b. 120Nm counter-
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clockwise, 100Nm clockwise, counter- g8 g8 g8
clockwise rotation. g8
c. 80Nm counter-clockwise, 100Nm clockwise, counter-
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clockwise rotation. g8
d. 60Nm counter-
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clockwise, 100Nm clockwise, clockwise rotation. -
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correct answer✔ ✔ B
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A titanium bar with a mass of 2kg and a length of 3m s
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hortens by 0.02mm under a compressive load of 3900k
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N. What is the strain?
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Select one: g8
a. 6.66 x 10-3
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b. -1.9 x 102
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c. 0.000006666
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d. 1.9 x 10-3 - correct answer✔ ✔ C
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External tensile forces acting parallel but not in line pro
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duce _________ in an object.
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,Select one: g8
a. Shear stress
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b. Working stress
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c. Compressive stress
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d. Tensile stress - correct answer✔ ✔ A
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The ratio between the ultimate strength and the allowabl
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e stress is called the:
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Select one: g8
a. Working stress
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b. Safety factor
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c. Maximum allowable load
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d. Ultimate stress - correct answer✔ ✔ B
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The ability of a material to return to its original shape a
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fter the force or load that caused the deformation is rem
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oved is called:
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Select one: g8
, a. Ductility
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b. Elasticity
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c. Stiffness
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d. Plasticity - correct answer✔ ✔ B
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1 psi equals:
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Select one: g8
a. 0.145 kPa
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b. 6.89 kPa
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c. 1 kilopascal
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d. 100 kPa - correct answer✔ ✔ B
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How much work is done by a pump with a 0.1m diamet
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er piston, traveling 250mm against a pressure of 1500kP
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a?
Select one: g8
a. 3.72 kJ
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b. 5.9 kJ
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Elementary mechanics and dynamics
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What is the power required to apply a 200kN force over
g8 g8 g8 g8 g8 g8 g8 g8 g8 g8
a distance of 15m in 15 seconds?
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Select one: g8
a. 3000 W
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b. 1500 kW
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c. 1000 kW
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d. 200 kW - correct answer✔ ✔ D
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A 7m long bar is pivoted at 2m from the left end. A for
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ce of 60N is applied downwards on the left end and a f
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orce of 20N is applied downward on the right end. Wha
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t would be the clockwise and counter-
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clockwise moments about the pivot, due to each force, a
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nd in which direction would the bar rotate?
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Select one: g8
a. 120Nm counter-
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clockwise, 100Nm clockwise, clockwise rotation.
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,b. 120Nm counter-
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clockwise, 100Nm clockwise, counter- g8 g8 g8
clockwise rotation. g8
c. 80Nm counter-clockwise, 100Nm clockwise, counter-
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clockwise rotation. g8
d. 60Nm counter-
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clockwise, 100Nm clockwise, clockwise rotation. -
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correct answer✔ ✔ B
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A titanium bar with a mass of 2kg and a length of 3m s
g8 g8 g8 g8 g8 g8 g8 g8 g8 g8 g8 g8 g8
hortens by 0.02mm under a compressive load of 3900k
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N. What is the strain?
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Select one: g8
a. 6.66 x 10-3
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b. -1.9 x 102
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c. 0.000006666
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d. 1.9 x 10-3 - correct answer✔ ✔ C
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External tensile forces acting parallel but not in line pro
g8 g8 g8 g8 g8 g8 g8 g8 g8
duce _________ in an object.
g8 g8 g8 g8
,Select one: g8
a. Shear stress
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b. Working stress
g8 g8
c. Compressive stress
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d. Tensile stress - correct answer✔ ✔ A
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The ratio between the ultimate strength and the allowabl
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e stress is called the:
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Select one: g8
a. Working stress
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b. Safety factor
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c. Maximum allowable load
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d. Ultimate stress - correct answer✔ ✔ B
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The ability of a material to return to its original shape a
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fter the force or load that caused the deformation is rem
g8 g8 g8 g8 g8 g8 g8 g8 g8 g8
oved is called:
g8 g8
Select one: g8
, a. Ductility
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b. Elasticity
g8
c. Stiffness
g8
d. Plasticity - correct answer✔ ✔ B
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1 psi equals:
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Select one: g8
a. 0.145 kPa
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b. 6.89 kPa
g8 g8
c. 1 kilopascal
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d. 100 kPa - correct answer✔ ✔ B
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How much work is done by a pump with a 0.1m diamet
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er piston, traveling 250mm against a pressure of 1500kP
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a?
Select one: g8
a. 3.72 kJ
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b. 5.9 kJ
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