Machine Design MCQ with Answers

96) If a bearing is designated by the number 305, it means that the bearing is of

Answer is:

medium series whose bore is 25 mm

97) Tapered roller bearings can take

Answer is:

both radial and axial loads and the ratio of these being greater than unity

98) In order to remove internal stresses produced by hardening the steel, the process usually adopted is

Answer is:

tempering

99) A pressure vessel is said to be a thin shell, if the ratio of wall thickness to its diameter is equal to 1/10.

Answer is:

No

Explanation:

If the thickness of the wall of a shell is less than 1/10 of its diameter, it is known as thin shell.

If the thickness of the wall of a shell is greater than 1/10 of its diameter, it is known as thick shell.

The thick shells are, generally, used to withstand high pressures. Sometimes, even, compound thick shells are used to withstand very high pressures or to contain chemicals under high pressure.
The problem of thick cylinders is, somewhat, complex and is solved by Lame's theory.

100) A bolt of uniform strength can be developed by

Answer is:

96) If a bearing is designated by the number 305, it means that the bearing is of

medium series whose bore is 25 mm

97) Tapered roller bearings can take

both radial and axial loads and the ratio of these being greater than unity

98) In order to remove internal stresses produced by hardening the steel, the process usually adopted is

tempering

99) A pressure vessel is said to be a thin shell, if the ratio of wall thickness to its diameter is equal to 1/10.

No

100) A bolt of uniform strength can be developed by

keeping the core diameter of threads equal to the diameter of unthreaded portion of the bolt