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Mechanical Engineering - Engineering Mechanics

Exercise : Engineering Mechanics - Section 6
41.
If the efficiency of a lifting machine is kept constant, its velocity ratio is __________ propotional to its mechanical advantage.
directly
inversely
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
Non-coplaner non-concurrent forces are those forces which
meet at one point, but their lines of action do not lie on the same plane
do not meet at one point and their lines of action do not lie on the same plane
do not meet at one point but their lines of action lie on the same plane
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
The forces which meet at one point, but their lines of action __________ on the same plane, are Known as non-coplaner concurrent forces.
lie
do not lie
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
A force while acting on a body may
change its motion
balance the forces, already acting on it
give rise to the internal stresses in it
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
A screw jack used for lifting the loads is
a reversible machine
a non-reversible machine
an ideal machine
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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