Mechanical Engineering - Machine Design

1. 

Which of the following statement is wrong for a connecting rod ?

A. The connecting rod will be equally strong in buckling about X-axis and Y-axis, if Ixx = 4 Iyy
B. If Ixx > 4Iyy., the buckling will occur about Y-axis
C. If Ixx < 4Iyy., the buckling will occur about X-axis
D. The most suitable section for the connecting rod is T-section

Answer: Option D

Explanation:

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2. 

Which of the following statement is correct ?

A. The cold rolled shafting is stronger than hot rolled shafting
B. The hot rolled shafting is stronger than cold rolled shafting
C. The cold rolled and hot rolled shafting are equally strong
D. The shafts are not made by rolling process

Answer: Option A

Explanation:

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3. 

The most important dimension in the design of a nut is

A. pitch diameter
B. inside diameter
C. outside diameter
D. height

Answer: Option D

Explanation:

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4. 

Factor of safety for fatigue loading is the ratio of

A. elastic limit to the working stress
B. elastic limit to the yield point
C. endurance limit to the working stress
D. Young's modulus to the ultimate tensile strength

Answer: Option C

Explanation:

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5. 

The shafts of larger diameter are usually forged and turned to size in a lathe.

A. Yes
B. No

Answer: Option A

Explanation:

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