In a screw jack, the effort required to lower the load is less than the effort required to raise the same load.
46) In a screw jack, the effort required to lower the load is ______ the effort required to raise the same load.
Answer is:
less than
Explanation:
Related Engineering Mechanics MCQ with Answers
Answer is:
100 percent
Explanation:
An ideal machine is that in which there is no dissipation of energy in any manner. In an ideal machine, the work output is equal to the work input, i.e., efficiency of an ideal machine is 100%.
In ideal machines mechanical advantage is equal to velocity ratio.
Answer is:
load lifted to the effort applied
Explanation:
the mechanical advantage of a lifting machine is the ratio of load lifted to the effort applied.
Answer is:
all of the above
Explanation:
The efficiency of a lifting machine is the ratio of
output to the input
work done by the machine to the work done on the machine
mechanical advantage to the velocity ratio
Answer is:
equal to
Explanation:
An ideal machine is that in which there is no dissipation of energy in any manner. In an ideal machine, the work output is equal to the work input, i.e., efficiency of an ideal machine is 100%.
In ideal machines mechanical advantage is equal to velocity ratio.