Mechanical Engineering - Theory of machines
Exercise :: Theory of machines - Section 1
21.
When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a
A. lower pair B. higher pair C. self-closed pair D. force-closed pair
Answer: Option A
Explanation:
22.
The centre distance between two meshing involute gears is equal to
Answer: Option A
Explanation:
23.
The two elements of a pair are said to form a __________ when they permit relative motion between them.
A. open pair B. kinematic pair
Answer: Option B
Explanation:
24.
When the axes of the shafts, over which the gears are mounted, move relative to a fixed axis, then the train is known as reverted gear train.
Answer: Option B
Explanation:
25.
In under damped vibrating system, the amplitude of vibration
A. decreases linearly with time B. increases linearly with time C. decreases exponentially with time D. increases exponentially with time
Answer: Option C
Explanation:
