The Whitworth quick return motion mechanism is formed in a slider crank chain when the
A. Coupler link is fixed
B. Longest link is a fixed link
C. Slider is a fixed link
D. Smallest link is a fixed link
Answer: Option A
This Question Belongs to Mechanical Engineering >> Theory Of Machine
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In considering friction of a V-thread, the virtual coefficient of friction (μ1) is given by
A. μ1 = μsinβ
B. μ1 = μcosβ
C. $${\mu _1} = \frac{\mu }{{\sin \beta }}$$
D. $${\mu _1} = \frac{\mu }{{\cos \beta }}$$
The lower pairs are _________ pairs.
A. Self-closed
B. Force-closed
C. Friction closed
D. None of these
In a coupling rod of a locomotive, each of the four pairs is a ________ pair.
A. Sliding
B. Turning
C. Rolling
D. Screw
A kinematic chain is known as a mechanism when
A. None of the links is fixed
B. One of the links is fixed
C. Two of the links are fixed
D. None of these
D is the correct one...
When coupler is fixed it forms " crank and rocker /lever QRMM and " Oscillating Engine "
DDDDDDDD
Smallest link is a fixed link
Option D is right one
Withworth QR mechanism is formed when the shortest link has fixed, ie option D is the right one.