Mechanical Properties of Fluids Test

Result

Mechanical Properties of Fluids Test - 70

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

A spherical drop of water has 1$$\mathrm { mm }$$ radius. If the surfacetension of the water is $$50 \times 10 ^ { - 3 } \mathrm { N } / \mathrm { m }$$ , then the differenceof pressure between inside and outside the spherical dropis:

A
25$$\mathrm { N } / \mathrm { m } ^ { 2 }$$

B
10000$$\mathrm { N } / \mathrm { m } ^ { 2 }$$

C
100$$\mathrm { N } / \mathrm { m } ^ { 2 }$$

D
50$$\mathrm { N } / \mathrm { m } ^ { 2 }$$

Solution
Question 2
1 / -0

Water is filled in a container up to a height of $$3m$$. A small hole of area $$'a'$$ is punched in the wall of the container at a height of $$52.5 \ cm$$ from the bottom. The cross-sectional area of the container is $$A$$. If $$\dfrac{a}{A}=0.1$$ then $$v^2$$ (in $$m^2s^{-2}$$) is (where v is the velocity of water coming out of the hole)

A
$$ 50 $$

B
$$ 51 $$

C
$$ 48 $$

D
$$ 52 $$
Question 3
1 / -0

The residual pressure of a vessel at $${27}^{o}C$$ is $$1\times{10}^{-11}N/{m}^{2}$$. The number of molecules per cc in this vessel is nearly

A
$$2400$$

B
$$2.4\times{!0}^{8}$$

C
$${10}^{-11}\times 6\times{10}^{23}$$

D
$$2.68\times{10}^{-19}\times {10}^{-11}$$

Solution
Question 4
1 / -0

Which of the following is NOT the characteristic of turbulent flow ?

A
Velocity more than the critical velocity

B
Velocity less than the critical velocity

C
Irregular flow

D
Molecules crossing from one layer to another

Solution
Question 5
1 / -0

Two identical holes of each of cross sectional area $$A$$ are opened on the opposite sides of a wide vertical vessel filled with water.The difference in vertical height of the two holes is $$h$$. The resultant force of reaction of water flowing out of vessel is-

A
$$h\rho gA$$

B
$$\cfrac{1}{2}h\rho g A$$

C
$$2h\rho gA$$

D
$$\cfrac{1}{4}h\rho g A$$

Solution
Question 6
1 / -0

A glass ball is dropped into a long cylinder full of water. The terminal velocity of the ball depends on

A
Radius of the ball

B
Height of the cylinder

C
Hydrostatic pressure

D
Diameter of the cylinder

Solution
Question 7
1 / -0

The piston shown in the figure is moved downwards such that the vapour volume is decreased by 246.3cc. How many grams of $${ H }_{ 2 }O$$ is condensed? Assume aqueous tension at $$\quad { 27 }^{ 0 }C$$ is 360 mm Hg)

A
1.8 gms

B
0.09 gms

C
0.9 gms

D
0.18 gms

Solution
Question 8
1 / -0

Two glass balls of radii r and 2r are dropped in air. The terminal velocity of the ball with radius r is 1 $$cms^{-1}$$.. That of the other will be

A
0.5 $$cms^{-1}$$.

B
1 $$cms^{-1}$$.

C
2 $$cms^{-1}$$.

D
4 $$cms^{-1}$$.

Solution
Question 9
1 / -0

A small spherical body of radius r is falling under gravity in a viscous medium and due to friction the medium gets heated. When body attains terminal velocity then rate of heating is proportional to.

A
r

B
$${ r }^{ \frac { 3 }{ 2 } }$$

C
$${ r }^{ 5 }$$

D
$${ r }^{ \frac { 1 }{ 2 } }$$

Solution
Question 10
1 / -0

Water flows through a pipe. The area of cross - section at one place $$A_1$$ = 10 $$cm^{2}$$, velocity of flow 1 m/s and pressure 2000 pa. At another place area $$A_2$$ = 5 $$cm^{2}$$. What is the pressure at area $$A_2$$ = 5 $$cm^2$$

A
500 Pa

B
100 Pa

C
400 Pa

D
200 Pa

Solution