Saturday, December 8, 2018

MECHANICAL ENGINEERING TOP MCQ ON MACHINE DESIGN

01.In a coupling rod of a locomotive, each of the four pairs is a ________ pair. 

Turning.

02. A pantograph is a mechanism with


Image result for pantograph

Lower pairs.

03. A pantograph consists of
Image result for pantograph

4 links


04.A Hooke’s joint is used to join two shafts which are

intersecting

05.A ball and a socket forms a 


Image result for ball and a socket

Spherical pair.

06.In a gear having involute teeth, the normal to the involute is 


Image result for involute teeth

Base circle.

07.The sleeve or muff coupling is designed as a

hollow shaft.

08.The number of rivets in shear shall be equal to the 

number of rivets in crushing.

09.When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as

Image result for crown bevel gear
crown bevel gear.

10. In second type of levers,


Image result for second type of levers

where P=effort, W=load, F=fulcrum,

load is in between the fulcrum and effort.

11.In a flange coupling, the flanges are coupled together by means of

bolts and nuts.

12.A column is known as a long column if the slenderness ratio is

100

13.The value of stress concentration factor depends upon

material and geometry of the part.

14.An open belt drive is used when


Image result for open belt drive

shafts are arranged parallel and rotate in the same directions.

15. The pipe joint mostly used for pipes carrying water at low pressures is

socket joint.

16.Stress concentration is caused due to

abrupt change of cross-section.

17.The resistance to fatigue of a material is measured by

endurance limit.

18. In a flange coupling, the thickness of flanges is taken as 

one-half the diameter of shaft.

19.The taper on cotter varies from

1 in 48 to 1 in 24.

20.The maximum normal stress theory is used for

brittle materials.

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