Theory Of Machine - Study Mode
[#211] The Kutzbach criterion for determining the number of degrees of freedom (n) is (where $$l$$ = number of links, j = number of joints and h = number of higher pairs)
Correct Answer
(A) n = 3($$l$$ - 1) - 2j - h
[#212] The example of lower pair is
Correct Answer
(D) All of the above
[#213] Which of the following is an example of sliding pair?
Correct Answer
(A) Piston and cylinder of a reciprocating steam engine
[#214] The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity $${omega _1}$$ rad/s in the clockwise direction and the link OB turns with angular velocity $${omega _2}$$ rad/s in the anticlockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)
Correct Answer
(C) $$left( {{omega _1} + {omega _2}}
ight){ ext{r}}$$
[#215] The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity $${omega _1}$$ rad/s in the clockwise direction and the link OB turns with angular velocity $${omega _2}$$ rad/s in the clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)
Correct Answer
(B) $$left( {{omega _1} - {omega _2}}
ight){ ext{r}}$$