Important Paper Mechanical Engineering

1. A body is having a simple harmonic motion Product of its frequency and time period is equal to
(a) Zero
(b) One 
(c )Infinity
(d)0.5
Ans. B
2. In case of a flywheel , maximum fluctuation in energy is
(a) Sum of maximum and minimum energies
(b) Difference of  maximum and minimum energies 
(c ) Ratio of maximum and minimum energies
(d) Ratio of minimum and maximum energies 
Ans. B
3. Which one of the following does not require a flywheel ?
(b) Steam engine
(b)Engine driven press
(c) CI engine 
(d) Gas turbine
Ans. D 
4. The flywheel of a steam engine has mass moment of inertia 2500 kg0m². IF the angular acceleration is 0.6 rad/s², what will be the starting torque required ?
(a) 2500NM
(b)2000NM
(c )1850NM
(d)1500NM
Ans. D
5. Fly wheel is NOT the part of which of the following machine ?
(a) Steam engine 
(b) Gas turbine
(c )Fly press
(d) Lathe machine 
Ans. D
6. Which of the following is included in power transmission
(a) counter shaft
(b) line shaft
(c )Overhead Shaft
(d)All of the above
Ans. D 
7. Centrifugal governors are preferred to the inertia type governors because an inertia governor
(a) has less controlling force
(b) is highly sensitive and more prone to hunting
(c ) poses problems in the balancing of inertia forces
(d) has high initial and maintenance cost
Ans. A
8. A spring controlled governor’s is found unstable . It may be made stable by
(a) Increasing spring stiffness
(b) Decreasing spring stiffness
(c )Increasing ball weight
(d) Decreasing ball weight
Ans. B
9. Porter governor is a :
(a) Pendulum type governor
(b) Dead weight type governor
(c )Spring loaded governor
(d) Inertia type governor
Ans. B
10. Sensitivity of an isochronous governor is :
(a) Zero
(b) One 
(c ) Two
(d) Infinity
Ans. D 
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