For an involute gear, the ratio of base circle radius and pitch circle radius is equal to
A. $$\sin \varphi $$
B. $$\cos \varphi $$
C. $$\sec \varphi $$
D. $${\text{cosec}}\varphi $$
Answer: Option B
Join The Discussion
Comments ( 1 )
Related Questions on Theory of Machine
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
In which of the following mechanism the relative motions of the rigid
bodies are in one plane or in parallel planes?
a) spatial mechanism
b) spherical mechanism
c) flexure mechanism
d) planar mechanism