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Mechanical Engineering - Theory of machines

Exercise : Theory of machines - Section 9
21.
Pitch point of a cam is
a point on the pitch curve having minimum pressure angle
a point on the pitch curve having maximum pressure angle
any point on the pitch curve
any point on the pitch circle
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
A torsional system with discs of moment of inertia I1 and I2 as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to
G.I2
G2.I2
I2/G
I2/G2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
A spring controlled governor is said to be isochronous when the controlling force
increases as the radius of rotation decreases
increases as the radius of rotation increases
decreases as the radius of rotation increases
remains constant for all radii of rotation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing the angle of advance of the eccentric while the throw of the eccentric, steam lap and exhaust lap are kept constant. This method will
cause withdrawing or throttling of steam
reduce length of effective stroke of piston
reduce maximum opening of port to steam
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
The equation of motion for a vibrating system with viscous damping is
,
if the roots of the equation are complex conjugate, then the system will be critically damped.
Yes
No
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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