IndiaBIX

Mechanical Engineering - Theory of machines

Exercise : Theory of machines - Section 10
36.
The load cup of a screw jack is made separate from the head of the spindle to
enhance the load carrying capacity of the jack
reduce the effort needed for lifting the working load
reduce the value of frictional torque required to be countered for lifting the load
prevent the rotation of load being lifted
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
In an open pair, the two elements of a pair
have a surface contact when in motion
have a line or point contact when in motion
are kept in contact by the action of external forces, when in motion
are not held together mechanically
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
The frictional torque transmitted in a flat collar bearing, considering uniform pressure, is (where r1 and r2 = External and internal radii of collar respectively)
μ W (r1 + r2)
μ W (r1 + r2)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Efficiency of a screw jack is given by
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
The ratio of the driving tensions for V-belts is __________ times that of flat belts. (where β = Semi-angle of the groove)
sin β
cos β
cosec β
sec β
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers