Question Set 186

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

A.	light series whose bore is 5 mm
B.	light series whose bore is 25 mm
C.	medium series whose bore is 5 mm
D.	medium series whose bore is 25 mm

Answer: Option D

Tapered roller bearings can take

A.	radial load only
B.	axial load only
C.	both radial and axial loads and the ratio of these being less than unity
D.	both radial and axial loads and the ratio of these being greater than unity

Answer: Option D

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

Answer: Option A

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

A.	Yes
B.	No

Answer: Option B

A bolt of uniform strength can be developed by

A.	keeping the core diameter of threads equal to the diameter of unthreaded portion of the bolt
B.	keeping the core diameter smaller than the diameter of the unthreaded portion
C.	keeping the nominal diameter of threads equal to the diameter of unthreaded portion of the bolt
D.	none of the above

Answer: Option A

The ratio of endurance limit in shear to the endurance limit in flexure is

Answer: Option C

The lower deviation is the algebraic difference between the

A.	minimum limit and the basic size
B.	maximum limit and the basic size
C.	actual size and the corresponding basic size
D.	none of the above

Answer: Option A

When plates are fastened by a rivet, the holes in the plates should be made by punching and reaming.

A.	Correct
B.	Incorrect

Answer: Option B

When carbon in the cast iron is principally in the form of graphite, the cast iron will be of

Answer: Option A

10.

A shoe brake is commonly used in railway trains.

A.	Yes
B.	No

Answer: Option A