Q. Piston effort acts along the line of stroke.
✅ Correct Answer: (A)
true
Dynamics of Machines MCQs | Page - 9
Dear candidates you will find MCQ questions of Dynamics of Machines here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Q. In a horizontal engine, reciprocating parts are accelerated when the piston moves from
✅ Correct Answer: (A)
tdc to bdc
Q. In a horizontal engine, reciprocating parts are retarded when the piston moves from
✅ Correct Answer: (B)
bdc to tdc
Q. When the piston is accelerated, the piston effort is given by which of the following the equation?
✅ Correct Answer: (B)
f(l) + f(i)
Q. In the presence of frictional resistance, the expression for piston effort is
✅ Correct Answer: (C)
f(l) ± f(i) – r(f)
Q. Crank effort is the product of crank pin radius and
✅ Correct Answer: (B)
crankpin effort
Q. In a horizontal engine, the weight of the reciprocating parts also add/subtract to the piston effort.
✅ Correct Answer: (B)
false
Q. For the given data of an Internal combustion engine : Mass of parts = 180 kg bore = 175 mm, length of stroke = 200 mm, engine speed = 500 r.p.m., length of connecting rod = 400 mm and crank angle = 60° from T.D.C, find the inertia force.
✅ Correct Answer: (C)
18.53 n
Q. 45 N/mm2. The connecting rod length between centres is 1.2 m and the cylinder bore is 0.5 m. If the engine runs at 250 r.p.m. and if the effect of piston rod diameter is neglected, calculate the net load on piston.
✅ Correct Answer: (D)
88357 n
Q. 2 m and the cylinder bore is 0.5 m. engine runs at 250 r.p.m & 30° from T.D.C. Find the piston effort.
✅ Correct Answer: (C)
37.3 kn
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