For a self locking machine, the efficiency must be

A)
less than 50%
B)
equal to 50%
C)
greater than 50%
D)
100%

Correct Answer : Option (A) :   less than 50%

Recently Updated in Engineering Mechanics Questions
The coefficient of restitution for elastic bodies is one.
A)
Correct
B)
Incorrect
C)
Both (A) and (B)
D)
Neither (A) nor (B)

Correct Answer :   Incorrect

Explanation : Coefficient of restitution for elastic bodies is 0 - 1.

Coefficient of restitution for perfect elastic bodies is 1.

Which of the following type of screws is used in the machines?
A)
Round-threaded
B)
Helical-threaded
C)
Square-threaded
D)
Rectangle-threaded

Correct Answer :   Square-threaded

Explanation : In the machines, square threaded screws are employed. Because screws are commonly employed as fasteners. The fundamental benefit of screws is that the friction aids in the structure’s retention. Screws also aid in the fast and efficient joining of the structure.

The term 'force' may be defined as an agent which produces or tends to produce, destroys or tends to destroy motion.
A)
Agree
B)
Disagree
C)
Both (A) and (B)
D)
None of the above

Correct Answer :   Agree

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