Mechanical Engineering - Machine Design

41.
In a hydrodynamic lubricated bearing
there is a thick film of lubricant between the journal and the bearing
there is a thin film of lubricant between the journal and the bearing
there is no lubricant between the journal and the bearing
the lubricant is forced between the journal and the bearing, by external pressure
Answer: Option
Explanation:
No answer description is available. Let's discuss.

42.
Which of the following statement is correct for 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
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.

43.
A flanged pipe joint will be a leak-proof joint, if the circumferential pitch of the bolts is (where d = Diameter of bolt hole)
less than 20 d
greater than 30 d
between 20 d and 30 d
equal to inside diameter of pipe
Answer: Option
Explanation:
No answer description is available. Let's discuss.

44.
Stress concentration is caused due to
variations in load acting on a member
variations in properties of materials in a member
abrupt change of cross-section
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

45.
The resistance to fatigue of a material is measured by
elastic limit
Young's modulus
ultimate tensile strength
endurance limit
Answer: Option
Explanation:
No answer description is available. Let's discuss.