The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is

1.  same

2.  double

3.  half

4.  four times

4

double

Explanation :
No Explanation available for this question

For manometer, a better liquid combination is one having

1.    higher surface tension

2.  lower surface tension

3.  surface tension is no criterion

4.  high density and viscosity

4

higher surface tension

Explanation :
No Explanation available for this question

If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water

1.  51 cm

2.  50 cm

3.  52 cm

4.  52.2 cm

4

51 cm

Explanation :
No Explanation available for this question

Choose the wrong statement. Alcohol is used in manometer, because

1.  its vapor pressure is low

2.  it provides suitable meniscus for the inclined tube

3.  its density is less

4.  it provides longer length for a given pressure difference

4

its vapor pressure is low

Explanation :
No Explanation available for this question

Which of the following is the example of lever of first order

1.  arm of man

2.  pair of scissors

3.  pair of clinical tongs

4.  all of the above

4

all of the above

Explanation :
No Explanation available for this question

A pair of smith's tongs is an example of the lever of

1.  zeroth order

2.  first order

3.  second order

4.  third order

4

second order

Explanation :
No Explanation available for this question

In the lever of third order, load W, effort P and fulcrum F are oriented as follows

1.  W between P and F

2.  F between W and P

3.  P between W and F

4.  W, P and F all on one side

4

W between P and F

Explanation :
No Explanation available for this question

The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of

1.  friction

2.  limiting friction

3.  repose

4.  kinematic friction

4

repose

Explanation :
No Explanation available for this question

In actual machines

1.  mechanical advantage is greater than velocity ratio

2.  mechanical advantage is equal to velocity ratio

3.  mechanical advantage is less than velocity ratio

4

mechanical advantage is less than velocity ratio

Explanation :
No Explanation available for this question

In ideal machines

1.  mechanical advantage is greater than velocity ratio

2.  mechanical advantage is equal to velocity ratio

3.  mechanical advantage is less than velocity ratio