Machine Design MCQ with Answers

36) According to Guest's theory, the failure occurs at a point in a member when the maximum shear stress in a bi-axial stress system reaches the shear stress at elastic limit in simple tension test.

Answer is:

Right

37) Surface endurance limit of gear material is dependent upon its

Answer is:

brinell hardness number

38) In a hydrodynamic lubricated bearing

Answer is:

there is a thick film of lubricant between the journal and the bearing

39) Which of the following statement is correct for gears?

Answer is:

all of the above

Explanation:

In Gears
* The addendum is less than dedendum
* The pitch circle diameter is equal to the product of module and number of teeth
* The pitch circle is always greater than the base circle

40) A flanged pipe joint will be a leak-proof joint, if the circumferential pitch of the bolts is (where d = Diameter of bolt hole)

Answer is:

36) According to Guest's theory, the failure occurs at a point in a member when the maximum shear stress in a bi-axial stress system reaches the shear stress at elastic limit in simple tension test.

Right

37) Surface endurance limit of gear material is dependent upon its

brinell hardness number

38) In a hydrodynamic lubricated bearing

there is a thick film of lubricant between the journal and the bearing

39) Which of the following statement is correct for gears?

all of the above

40) A flanged pipe joint will be a leak-proof joint, if the circumferential pitch of the bolts is (where d = Diameter of bolt hole)

between 20 d and 30 d