You may be Loooking for

Notifications
Mark All As Read

You have to be logged in for this features
Just now

View All
Guest

Please log in

Login

IOE-BOOSTER

IOE

Questions
Todays Tutorials
Previous Tutorials
Asked Questions
Learning By playing
GAMES
Exams From
Todays Pick Studied question yet
Exam Results
Results
My Plans
My Plans

Ask Question

Ask Mcqs

Guest
You need to login to ask any Questions from chapter Impact-of-Jets-and-Jet-Propulsion of Fluid-Mechanics-Mcqs

Chapter:

Impact-of-Jets-and-Jet-Propulsion

1. For dynamic fluid motion in a pipe, pressure measurement cannot be carried out accurately by manometer.

True False

True

For fluid moving with variable velocity, fluctuation in pressure is frequent and more in magnitude. Hence, we cannot use manometer.

Hint Answer

2. If a gas X be confined inside a bulb as shown, by what percent will pressure of gas be higher or lower than atmospheric pressure? (Take atmospheric pressure equal to 101.3 kPa )

$If a gas X be confined inside a bulb as shown, by what percent will pressure of gas be higher or lower than atmospheric pressure? (Take atmospheric pressure equal to 101.3 kPa )\r\n \r\n$

4:75% higher 4:75% lower 6:75% higher 6:75% lower

4:75% higher

P_a = P_atm = 101.3
P_b = P_a + 0.9 * 9.81 * 0.03 = 101.56
P_c = P_b + 13.6 * 9.81 * 0.04 = 106.9
P_d = P_c ? 1 * 9.81 * 0.05 = 106.41
P_e = P_d ? 0.9 * 9.81 * 0.04 = 106.1
P_X = P_e = 106.1
Since, P_X > P_atm, percentage by which pressure of gas is higher than atmospheric pressure will be

$If a gas X be confined inside a bulb as shown, by what percent will pressure of gas be higher or lower than atmospheric pressure? (Take atmospheric pressure equal to 101.3 kPa )\r\n \r\n$

Hint Answer

3. A Differential manometer is connected at points A and Bat centre of two pipes. The pipe A(left limb) contains a liquid of specific gravity = 1.5 while pipe B (right limb)contains a liquid of specific gravity 0.85. The pressure at A and B are .5 kgf/cm² and 1.2 kgf/cm2 respectively. Find difference in level of mercuru in differential manometer. A is 2.5m above B and 5 m above mercury in its own limb. B is 2.5 m above mercury level in limb A.

12.7 cm 25.5 cm 6.28 cm 10.85 cm

12.7 cm

Total pressure at datum line in limb A = Total pressure at datum line in limb B\
0.5*9.81*10000 + 5*9.81*1500 + h*9.81*13600 = 1.2*9.81*10000 + (h+2)*9.81*850
After solving,
h=12.7 cm.

Hint Answer

4. A closed tank (each side of 5 m) is partially filled with fluid as shown. If pressure of air above fluid is 2 bar, find pressure at bottom of tank. Assume density ρ of fluid to vary according to given relation:

$A closed tank (each side of 5 m) is partially filled with fluid as shown. If pressure of air above fluid is 2 bar, find pressure at bottom of tank. Assume density ρ of fluid to vary according to given relation:\r\n \r\n$

766 776 786 796

786

P_A = P_atm = 760
P_B = P_A + 30
P_C = P_B ? 50 / 13.6 = 786.32
P_X = P_C = 786.3.

Hint Answer

5. We can draw Mohr’s circle for a fluid at rest.

True false

false

Mohr?s circle is used to denote shear stress distribution. For fluid at rest, re is no shear stress. Hence, we cannot draw Mohr?s circle for fluid at rest.

Hint Answer

6. The arm of a teapot is 10 cm long and inclined at an angle of 60^o to vertical. The center of arm base is 2 cm above base of beaker. Water is poured into beaker such that half arm is filled with it. What will be pressure at base of beaker if atmospheric pressure is 101.3 kPa?

$The arm of a teapot is 10 cm long and inclined at an angle of 60o to vertical. The center of arm base is 2 cm above base of beaker. Water is poured into beaker such that half arm is filled with it. What will be pressure at base of beaker if atmospheric pressure is 101.3 kPa?\r\n \r\n$

101.3 101.5 101.7 101.9

101.7

Total height of water in beaker = 2 + ¹?₂ * 10 cos 60^o cm = 4:5 cm. Pressure at base of beaker = 101.3 + 10³ * 9.81 * 0.045 Pa = 101.3 + 0.44 kPa = 101.74 kPa.

Hint Answer

7. What is viscosity of water at 30^oC?

80.1 0 .801 801 0.081

0 .801

A graph is plotted with temperature in x-axis and dynamic viscosity in y-axis. With increase in pressure viscosity decreases. It corresponds to an informal concept of thickness.

Hint Answer

8. The pressure at any given point of a non-moving fluid is called ________

Gauge Pressure Atmospheric Pressure Differential Pressure Hydrostatic Pressure

Hydrostatic Pressure

Hydrostatic pressure varies with increase in depth. Hydrostatic pressure is measured from surface of fluid because of increasing weight of fluid. The fluid exerts a downward force from surface of water thus making it a non-moving fluid.

Hint Answer

9. A beaker of height 15 cm is completely filled with water. Now two-third of liquid is taken out and an equal amount of two or immiscible liquids of specific gravities 0.8 and 1.2 are poured into tank. What will be pressure (in kPa ) at a point situated at a height, half height of beaker?

$A beaker of height 15 cm is completely filled with water. Now two-third of liquid is taken out and an equal amount of two or immiscible liquids of specific gravities 0.8 and 1.2 are poured into tank. What will be pressure (in kPa ) at a point situated at a height, half height of beaker?\r\n \r\n$

588.6 637.65 735.75 833.85

637.65

PA = 0.8 * 10³ * 9.81 * 0.05 + 1 * 10³ * 9.81 * 0.025 = 637.65 kPa.

Hint Answer

10. Which device is popularly used for measuring difference of low pressure?

Inverted U-tube Differential Manometer U-tube Differential Manometer Inclined Single column manometer Vertical Single column manometer

Inverted U-tube Differential Manometer

Inverted U-tube Differential Manometer has lighter manometric fluid, Hence it is used for measuring low pressure difference.

Hint Answer

Nexttt

All Chapters

View all Chapter and number of question available From each chapter from Fluid-Mechanics-Mcqs

Properties of Fluids

Properties of Fluids

Pressure and Its Measurement

Pressure and Its Measurement

Hydrostatic Forces on Surfaces

Hydrostatic Forces on Surfaces

Buoyancy and Floatation

Buoyancy and Floatation

Kinematics of Flow and Ideal Flow

Kinematics of Flow and Ideal Flow

Fluid Dynamics

Orifices, Mouthpieces, Notches and Weirs

Orifices, Mouthpieces, Notches and Weirs

Viscous Flow & Turbulent Flow

Viscous Flow & Turbulent Flow

Flow Through Pipes

Flow Through Pipes

Indicator Diagrams

Indicator Diagrams

Dimensional and Model Analysis

Dimensional and Model Analysis

Boundary Layer Flow & Forces on Sub-merged Bodies

Boundary Layer Flow & Forces on Sub-merged Bodies

Compressible Flow

Compressible Flow

Flow in Open Channels

Flow in Open Channels

Non Uniform Flow in Channels

Non Uniform Flow in Channels

Impact of Jets and Jet Propulsion

Impact of Jets and Jet Propulsion

Topics

This Chapter Impact-of-Jets-and-Jet-Propulsion consists of the following topics

Pressure and Its Measurement

For dynamic fluid motion in a pipe, pressure measurement cannot be carried out accurately by manometer.

If a gas X be confined inside a bulb as shown, by what percent will pressure of gas be higher or lower than atmospheric pressure? (Take atmospheric pressure equal to 101.3 kPa )

$If a gas X be confined inside a bulb as shown, by what percent will pressure of gas be higher or lower than atmospheric pressure? (Take atmospheric pressure equal to 101.3 kPa )\r\n \r\n$

;

A Differential manometer is connected at points A and Bat centre of two pipes. The pipe A(left limb) contains a liquid of specific gravity = 1.5 while pipe B (right limb)contains a liquid of specific gravity 0.85. The pressure at A and B are .5 kgf/cm² and 1.2 kgf/cm2 respectively. Find difference in level of mercuru in differential manometer. A is 2.5m above B and 5 m above mercury in its own limb. B is 2.5 m above mercury level in limb A.

A closed tank (each side of 5 m) is partially filled with fluid as shown. If pressure of air above fluid is 2 bar, find pressure at bottom of tank. Assume density ρ of fluid to vary according to given relation:

$A closed tank (each side of 5 m) is partially filled with fluid as shown. If pressure of air above fluid is 2 bar, find pressure at bottom of tank. Assume density ρ of fluid to vary according to given relation:\r\n \r\n$

;

We can draw Mohr’s circle for a fluid at rest.

The arm of a teapot is 10 cm long and inclined at an angle of 60^o to vertical. The center of arm base is 2 cm above base of beaker. Water is poured into beaker such that half arm is filled with it. What will be pressure at base of beaker if atmospheric pressure is 101.3 kPa?

$The arm of a teapot is 10 cm long and inclined at an angle of 60o to vertical. The center of arm base is 2 cm above base of beaker. Water is poured into beaker such that half arm is filled with it. What will be pressure at base of beaker if atmospheric pressure is 101.3 kPa?\r\n \r\n$

;

What is viscosity of water at 30^oC?

The pressure at any given point of a non-moving fluid is called ________

A beaker of height 15 cm is completely filled with water. Now two-third of liquid is taken out and an equal amount of two or immiscible liquids of specific gravities 0.8 and 1.2 are poured into tank. What will be pressure (in kPa ) at a point situated at a height, half height of beaker?

$A beaker of height 15 cm is completely filled with water. Now two-third of liquid is taken out and an equal amount of two or immiscible liquids of specific gravities 0.8 and 1.2 are poured into tank. What will be pressure (in kPa ) at a point situated at a height, half height of beaker?\r\n \r\n$

;

Which device is popularly used for measuring difference of low pressure?

Info Message