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Engineering Mechanics
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Question
The amount by which the outer edge of the rail is raised, is known as super-elevation.
Options
A. Agree
B. Disagree
Correct Answer
Agree
More questions
1. The cutting force in up milling __________ per tooth movement of the cutter.
Options
A. is zero
B. is maximum
C. decreases from maximum to zero
D. increases from zero to maximum
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Correct Answer: increases from zero to maximum
2. The volumetric efficiency of the compressor is defined as the ratio of volume of free air delivery per stroke to the swept volume of the piston.
Options
A. Yes
B. No
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Correct Answer: Yes
3. The celerity (velocity) of a pressure wave in a fluid is given by (where
K
= Bulk modulus, and ? = Density of the fluid)
Options
A.
K
.?
B.
K
/?
C.
?/
K
D.
K
.?
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Correct Answer:
K
/?
4. In a four speed four-stroke Diesel engine, the intake valve
Options
A. opens at T.D.C. and closes at B.D.C.
B. opens at 20° before T.D.C. and closes at 35° after B.D.C.
C. opens at 10° after T.D.C. and closes at 20° before B.D.C.
D. none of the above
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Correct Answer: opens at 20° before T.D.C. and closes at 35° after B.D.C.
5. The maximum deflection of a cantilever beam of length
l
with a uniformly distributed load of
w
per unit length is (where
W
=
wl
)
Options
A.
B.
C.
D.
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Correct Answer:
6. The stiffness of a closely-coiled helical spring is __________ proportional to number of turns.
Options
A. directly
B. inversely
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Correct Answer: inversely
7. The specific speed of a turbine is given by the equation
Options
A.
B.
C.
D.
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Correct Answer:
8. Compression members always tend to buckle in the direction of the
Options
A. axis of load
B. perpendicular to the axis of load
C. minimum cross section
D. least radius of gyration
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Correct Answer: least radius of gyration
9. In an ideal impulse turbine, the
Options
A. absolute velocity at the inlet of moving blade is equal to that at the outlet
B. relative velocity at the inlet of the moving blade is equal to that at the outlet
C. axial velocity at inlet is equal to that at the outlet
D. whirl velocity at inlet is equalto that at the outlet
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Correct Answer: relative velocity at the inlet of the moving blade is equal to that at the outlet
10. A fine grained grinding wheel is used to grind hard materials.
Options
A. Correct
B. Incorrect
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Correct Answer: Correct
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