Q.1
The net force acting on the crosshead pin is known as __________
  • a) Crank pin effort
  • b) Crank effort
  • c) Piston effort
  • d) Shaft effort
Q.2
Piston effort acts along the line of stroke.
  • a) True
  • b) False
Q.3
In a horizontal engine, reciprocating parts are accelerated when the piston moves from _______
  • a) TDC to BDC
  • b) BDC to TDC
  • c) Midway to TDC
  • d) BDC to midway
Q.4
In a horizontal engine, reciprocating parts are retarded when the piston moves from _________
  • a) TDC to BDC
  • b) BDC to TDC
  • c) Midway to TDC
  • d) BDC to midway
Q.5
When the piston is accelerated, the piston effort is given by which of the following the equation?
  • a) F(L) – F(I)
  • b) F(L) + F(I)
  • c) F(L) ± F(I)
  • d) F(L) – F(I) + R(f)
Q.6
In the presence of frictional resistance, the expression for piston effort is _________
  • a) F(L) – F(I)
  • b) F(L) + F(I)
  • c) F(L) ± F(I) – R(f)
  • d) F(L) – F(I) + R(f)
Q.7
Crank effort is the product of crank pin radius and _______
  • a) Thrust on sides
  • b) Crankpin effort
  • c) Force acting along connecting rod
  • d) Piston effort
Q.8
In a horizontal engine, the weight of the reciprocating parts also add/subtract to the piston effort.
  • a) True
  • b) False
Q.9
For the given data of an Internal combustion engine : Mass of parts =kg bore =mm, length of stroke =mm, engine speed =r.p.m., length of connecting rod =mm and crank angle =from T.D.C, find the inertia force.
  • a) 17.56 N
  • b) 19.2 N
  • c) 18.53 N
  • d) 18.00 N
Q.10
The crank-pin circle radius of a horizontal engine ismm. The mass of the reciprocating parts iskg. When the crank has travelledfrom T.D.C., the difference between the driving and the back pressures is 0.N/mmThe connecting rod length between centres is 1.2 m and the cylinder bore is 0.5 m. If the engine runs atr.p.m. and if the effect of piston rod diameter is neglected, calculate the net load on piston.
  • a) 88000 N
  • b) 90560 N
  • c) 78036 N
  • d) 88357 N
Q.11
From the data given:
  • a) 32.4 kN
  • b) 35.2 kN
  • c) 37.3 kN
  • d) 40.2 N
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