A flywheel is fitted to the crankshaft of an engine having W as the amount of indicated work per revolution and permissible limits of coefficient of fluctuation of energy and speed as CE and CS respectively. The kinetic energy of the flywheel is given by
A. $$\frac{{2{\text{W}}{{\text{C}}_{\text{E}}}}}{{{{\text{C}}_{\text{S}}}}}$$
B. $$\frac{{{\text{W}}{{\text{C}}_{\text{E}}}}}{{{\text{2}}{{\text{C}}_{\text{S}}}}}$$
C. $$\frac{{{\text{W}}{{\text{C}}_{\text{E}}}}}{{{{\text{C}}_{\text{S}}}}}$$
D. $$\frac{{{\text{W}}{{\text{C}}_{\text{S}}}}}{{{\text{2}}{{\text{C}}_{\text{E}}}}}$$
Answer: Option B
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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
Ce= ∆E/W= ∆E= Ce*w.......(1)
∆E= IW^2Cs= IW^2=∆E/Cs......(2)
KE= 1/2Iw^2 = 1/2(∆E/Cs)= 1/2w(Ce/Cs).