The condition which must be fulfilled by two gear tooth profiles to maintain a constant angular velocity ratio between them is called ________

Mechanical Engineering : Theory of Machines - Quiz(MCQ)

interference

arc of contact

law of gearing

path of contact

Correct Answer : Option (C) : law of gearing

Explanation : Law of gearing is the condition which must be fulfilled by two gear tooth profiles to maintain a constant angular velocity ratio between them. In order to maintain this constant angular velocity, the common normal of the tooth profiles should always pass through a fixed point on the line of centres, called fixed point.

Recently Updated in Theory of Machines Questions

A rotor which is balanced statically but not dynamically is supported on two bearings L apart and at high speed of the rotor, reaction on the left bearing is R. The right side of the bearing is shifted to a new position 2 L apart from the left bearing. At the same rotor speed, dynamic reaction on the left bearing in the new arrangement will

become equal to 2 R

become equal to R/2

become equal to R/4

remain same as before

Correct Answer :

The D-slide valve is also known as

piston slide valve

outside admission valve

inside admission valve

None of the above

Correct Answer : outside admission valve

When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a

governor

flywheel

D-slide valve

Meyer's expansion valve

Correct Answer : governor

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