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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