Engineering :: Engineering Mechanics
|
|
|
|
|
91. |
The static friction |
A. |
bears a constant ratio to the normal reaction between the two surfaces |
B. |
is independent of the area of contact, between the two surfaces |
C. |
always acts in a direction, opposite to that in which the body tends to move |
D. |
all of the above |
Answer: Option D
Explanation:
|
92. |
Static friction is always |
A. |
equal to |
B. |
less than |
C. |
greater than |
Answer: Option C
Explanation:
|
93. |
The angle of the inclined plane at which a body just begins to slide down the plane, is called helix angle. |
Answer: Option B
Explanation:
|
94. |
The angle which the normal reaction makes with the resultant reaction is called angle of friction. |
Answer: Option A
Explanation:
|
95. |
The angle of inclination of the plane at which the body begins to move down the plane, is called |
A. |
angle of friction |
B. |
angle of repose |
C. |
angle of projection |
D. |
none of these |
Answer: Option A
Explanation:
|
96. |
The minimum force required to slide a body of weight W on a rough horizontal plane is |
A. |
W sin ? |
B. |
W cos ? |
C. |
W tan ? |
D. |
none of these |
Answer: Option C
Explanation:
|
97. |
A body will begin to move down an inclined plane if the angle of inclination of the plane is |
A. |
equal to |
B. |
less than |
C. |
greater than |
Answer: Option C
Explanation:
|
98. |
Coefficient of friction is the ratio of the limiting friction to the normal reaction between the two bodies. |
Answer: Option A
Explanation:
|
99. |
Coefficient of friction depends upon |
A. |
area of contact only |
B. |
nature of surface only |
C. |
both (a) and (b) |
D. |
none of these |
Answer: Option B
Explanation:
|
100. |
The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane |
A. |
equal to |
B. |
less than |
C. |
greater than |
Answer: Option A
Explanation:
|
Read more:
|
|