Mechanical Properties of Fluids Test

Result

Mechanical Properties of Fluids Test - 68

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Question 1
1 / -0

A tank $5\ m$ high is half filled with water and then is filled to the top with oil of density $0.85\ g/cm^ {2}$ . The pressure at the bottom of the tank, due to these liquids, is

A
$1.85\ gf/cm^ {2}$

B
$89.25\ gf/cm^ {2}$

C
$462.5\ gf/cm^ {2}$

D
$500\ gf/cm^ {2}$

Solution
Question 2
1 / -0

For the arrangement shown in the figure, the force at the bottom of the vessel is

A
200 N

B
100 N

C
20 N

D
2 N

Solution
Question 3
1 / -0

When a venturimeter is used in an inclined position, it will show

A
same reading

B
higher reading

C
lower reading

D
depends on viscosity of liquid

Solution
Question 4
1 / -0

An ideal fluid is flowing in steady state from section A to B through a pipe in vertical plane as shown. Select incorrect statement. q

A
Total energy per unit volumes is same at both sections A and B

B
Incoming rate at A is equal to outgoing rate at B

C
Loss in kinetic energy of the fluid is equal to gain in potential energy from section A to B

D
Flow of fluid from A to B is laminar flow
Question 5
1 / -0

The ratio of forces exerted by the larger piston to the smaller piston is

A
1 : 144

B
1 : 72

C
144 : 1

D
72 : 1

Solution
Question 6
1 / -0

Two small drops of mercury, each of radius $R$ , coalesce to form a single large drop. The ratio of the total surface energies before and after the change is:-

A
$1:{2}^{1/3}$

B
${2}^{1/3}:1$

C
$2:1$

D
$1:2$

Solution
Question 7
1 / -0

If pressure at half the depth of a lake is equal to $\dfrac{2}{3}rd$ of the pressure at the bottom of the lake. Then what is the depth of the lake

A
$10$ $\mathrm { m }$

B
$20$ $\mathrm { m }$

C
$60$ $\mathrm { m }$

D
$30$ $\mathrm { m }$

Solution
Question 8
1 / -0

A solid sphere of density $\eta (>1)$ times lighter than water is suspended in a water tank by a string tied to its base as shown in fig. If the mass of the sphere is m then the tension in the string is given by

A
$(\frac{\eta -1}{\eta })mg$

B
$\eta$ mg

C
$\frac{mg}{\eta }$

D
$(\eta-1) mg$

Solution
Question 9
1 / -0

Statement I : in Steady flow, stream lines must remain parallel and equally spaced.
Statement II : In a steady flow, the pattern of stream lines does not change with time.

A
Both Statement-I, and Statement- II are true.

B
Both Statement-I, and Statement- II are false.

C
Statement-I is true, Statement-II is false.

D
Statement-I is false, Statement-II is true.

Solution
Question 10
1 / -0

The height of water level in a tank is 'H'. The horizontal range of water straem coming out of hole at a depth of H/4, from upper water level will be

A
$$

\frac{\sqrt{3} H}{2}

$$

B
$$

\frac{2 \mathrm{H}}{\sqrt{3}}

$$

C
$$

\frac{H}{\sqrt{3}}

$$

D
$$

\sqrt{3} \mathrm{H}

$$

Solution