Mechanical Engineering - Engineering Mechanics - Discussion

Discussion Forum : Engineering Mechanics - Section 3 (Q.No. 49)

Engineering Mechanics

49.

The efficiency of a screw jack is maximum, when(where α = Helix angle, and φ = Angle of friction.)

α = 45° + φ/2

α = 45° - φ/2

α = 90° + φ

α = 90° - φ

Answer: Option

Explanation:

No answer description is available. Let's discuss.

Discussion:

5 comments Page 1 of 1.

Abhilash said: 3 years ago

Agree, Option B is the correct answer.

Rajendra said: 4 years ago

B is the right answer.

Raghul said: 6 years ago

45 degree is thread angle then + sign which increase the maximum how come - sign.

Anjani Lal Awasthi said: 7 years ago

No, B is the Right answer.

Abhilash said: 8 years ago

I think option A is the correct answer.

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