Zero film bearings are those which operate without the presence of lubricant. The name itself elucidates that there is no film of lubricant present between contact surfaces. There is a direct contact between them. For example, sliding or rolling contact.
2) A sliding bearing in which the working surfaces are completely separated from each other by lubricant is called zero film bearing.
Answer is:
Wrong
Explanation:
Related Machine Design MCQ with Answers
Answer is:
high efficiency
Explanation:
Screws used for power transmission should have high efficiency.
Answer is:
Correct
Explanation:
When rivets are unable to shear of in tensile load they are under in crushed due to this rivet hole becomes of an oval shape. Due to this, no of rivets under shear shall be equal to the no of rivets under crushing.
Answer is:
crown bevel gears
Explanation:
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 Degree, then they are known as crown bevel gears.
Answer is:
decreases
Explanation:
Toughness:
When a huge external force is applied on a metal, the metal will experience fracture. Toughness is the ability of a metal to resist fracture. The ability of a material to resist fracture due to high impact loads, is called toughness.
The toughness of a material decreases when it is heated.
