TRUE
FALSE
✅ The correct answer is option A.
Mechanical Engineering MCQs
The connecting rod is attached to the piston by the
cap bolt
piston pin
cap roller bearing
rod cap
✅ The correct answer is option B.
The Poisson’s ratio for cast iron varies from
0.33 to 0.37
0.21 to 0.26
0.31 to 0.34
0.32 to 0.42
✅ The correct answer is option B.
Two forces are acting at an angle of 120°. The bigger force is 40N and the resultant is perpendicular to the smaller one. The smaller force is
20 N
40 N
80 N
none of these
✅ The correct answer is option A.
Silicon in cast iron
makes the iron soft and easily machinable
increases hardness and brittleness
makes the iron white and hard
aids fusibility and fl
✅ The correct answer is option A.
Instead of valves, the ports are used in case of
four stroke I.C. engines
two-stroke I.C. engines
V-6 engines
none of these
✅ The correct answer is option B.
The periodic time of a compound pendulum is __________ when the distance between the point of suspension and the centre of gravity is equal to the radius of gyration of the body about its centre of gravity.
zero
minimum
maximum
✅ The correct answer is option B.
The displacement of the reciprocating roller follower, when it has contact with the straight flanks of the tangent cam, is given by (where r1 = Minimum radius of the cam, r2 = Radius of the roller follower, and θ = Angle turned by the cam from the beginning of the follower displacement)
(r1 – r2)(1 – cosθ)
(r1 + r2)(1 + cos θ)
(r1 – r2)
(r1 + r2)
✅ The correct answer is option D.
When gas is heated at constant pressure, the heat supplied is utilised in
increasing the internal energy of gas
doing some external work
increasing the internal energy of gas and also for doing some external work
none of the above
✅ The correct answer is option C.
The ideal efficiency of simple gas turbine cycle depends upon pressure ratio.
Yes
No
✅ The correct answer is option A.