Fluid Statics: Master the Fundamentals of Fluid Pressure and Buoyancy

Question 1

Which fundamental principle of fluid statics is represented by the following statement: 'Fluids at rest exert pressure on all surfaces in contact with them.'?

Accepted Answer

Pascal's law

Answer

Archimedes' principle

Answer

Bernoulli's equation

Answer

Newton's law of viscosity

Question 2

Which of the following factors does NOT influence the pressure at a point within a fluid?

Accepted Answer

Fluid velocity

Answer

Fluid density

Answer

Depth of the point

Answer

Acceleration due to gravity

Question 3

A mercury barometer has a height of 760 mm. Calculate the atmospheric pressure in Pascals (Pa).

Accepted Answer

101.3 kPa

Answer

121.6 kPa

Answer

141.9 kPa

Answer

162.2 kPa

Question 4

Which of the following is NOT a fundamental assumption in fluid statics?

Accepted Answer

Fluids are viscous

Answer

Fluids are incompressible

Answer

Fluids are at rest

Answer

Fluids obey Newton's laws of motion

Question 5

The pressure at a point in a static fluid is:

Accepted Answer

Dependent on depth, fluid density, and acceleration due to gravity

Answer

Independent of depth

Answer

Dependent on the shape of the container

Answer

Dependent on depth and fluid density only

Question 6

The pressure gradient in a static fluid is:

Accepted Answer

Proportional to depth

Answer

Proportional to the fluid density

Answer

Zero

Answer

Constant

Question 7

The pressure inside a closed vessel containing a liquid is:

Accepted Answer

Sum of atmospheric and liquid pressures

Answer

Liquid pressure only

Answer

Dependent on the volume of the vessel

Answer

Atmospheric pressure only

Question 8

Which of the following devices measures fluid pressure?

Accepted Answer

Manometer

Answer

Flowmeter

Answer

Thermometer

Answer

Anemometer

Question 9

Which of the following statements describes the pressure distribution within a static fluid?

Accepted Answer

Pressure increases linearly with depth.

Answer

Pressure is constant at all points within the fluid.

Answer

Pressure decreases linearly with depth.

Answer

Pressure is proportional to the fluid's density.

Question 10

The concept of gauge pressure is used in fluid mechanics to:

Accepted Answer

Measure pressure relative to atmospheric pressure.

Answer

Measure pressure relative to absolute zero.

Answer

Measure pressure relative to the fluid's density.

Answer

Measure pressure relative to the depth of the fluid.

Question 11

In the context of fluid statics, the concept of a piezometer is used to measure:

Accepted Answer

Gauge pressure

Answer

Buoyant force

Answer

Flow rate

Answer

Viscosity

Question 12

Which of the following is NOT a fundamental property of fluids?

Accepted Answer

Elasticity

Answer

Density

Answer

Viscosity

Answer

Surface tension

Question 13

The upward force acting on an object submerged in a fluid is known as:

Accepted Answer

Buoyancy

Answer

Pressure force

Answer

Drag force

Answer

Gravity force

Question 14

In fluid statics, a key assumption is that:

Accepted Answer

Fluids are incompressible

Answer

Fluids are viscous

Answer

Fluids flow in a steady state

Answer

Fluids are non-Newtonian

Question 15

The pressure gradient within a fluid is primarily caused by:

Accepted Answer

Gravity

Answer

Density

Answer

Viscosity

Answer

Surface tension

Question 16

The pressure at a point in a fluid is:

Accepted Answer

Equal in all directions

Answer

Greater in the horizontal direction

Answer

Greater in the vertical direction

Answer

Zero

Question 17

The centre of pressure for a submerged surface is the:

Accepted Answer

Point where the resultant force acts

Answer

Centroid of the surface area

Answer

Highest point on the surface

Answer

Lowest point on the surface

Question 18

The pressure at a depth 'h' in a static fluid of density 'ρ' is:

Accepted Answer

ρgh

Answer

ρh/g

Answer

g/ρh

Answer

h/ρg

Question 19

A boat floats on water because:

Accepted Answer

The buoyancy force acting on it is greater than its weight

Answer

Its density is less than the density of water

Answer

The pressure of the water is greater at the bottom of the boat than at the top

Answer

Its weight is less than the weight of the water displaced by it

Question 20

When an object is submerged in a fluid, the upward force acting on the object is due to:

Accepted Answer

Buoyancy

Answer

Gravity

Answer

Pressure

Answer

Friction

Question 21

The difference between gauge pressure and absolute pressure is that:

Accepted Answer

Absolute pressure includes atmospheric pressure, while gauge pressure does not.

Answer

Gauge pressure includes atmospheric pressure, while absolute pressure does not.

Answer

Gauge pressure is measured in pascals, while absolute pressure is measured in atmospheres.

Answer

There is no difference between gauge pressure and absolute pressure.

Question 22

For a floating object to remain at rest in a fluid, the:

Accepted Answer

Weight of the object must be equal to the buoyant force.

Answer

Weight of the object must be greater than the buoyant force.

Answer

Weight of the object must be less than the buoyant force.

Answer

Fluid must be moving.

Question 23

Which of the following accurately describes the variation of fluid pressure with depth in a static fluid?

Accepted Answer

Fluid pressure increases linearly with increasing depth

Answer

Fluid pressure remains constant regardless of depth

Answer

Fluid pressure decreases linearly with increasing depth

Answer

Fluid pressure is highest at the surface and decreases with depth

Question 24

An object submerged in a fluid experiences an upward force known as buoyancy, which is:

Accepted Answer

Equal to the weight of the fluid displaced by the object

Answer

Equal to the weight of the object itself

Answer

Greater than the weight of the fluid displaced by the object

Answer

Less than the weight of the fluid displaced by the object

Question 25

When determining the center of pressure on a submerged surface, which of the following factors is NOT taken into account?

Accepted Answer

Shape of the container holding the fluid

Answer

Fluid density

Answer

Surface area

Answer

Depth of submergence

Question 26

In hydrostatic analysis of fluids, which of the following assumptions is NOT made?

Accepted Answer

The fluid behaves as a Newtonian fluid

Answer

The fluid is incompressible

Answer

The fluid is inviscid

Answer

The fluid flow is irrotational

Question 27

The pressure within a fluid at a specific point is:

Accepted Answer

Equal in all directions (Pascal's principle)

Answer

Greater in the horizontal direction

Answer

Greater in the vertical direction

Answer

Zero

Question 28

When an object is submerged in a fluid, it experiences an upward force called:

Accepted Answer

Buoyancy force (Archimedes' principle)

Answer

Drag force

Answer

Weight force

Answer

Normal force

Question 29

In a reservoir, the pressure at the bottom is:

Accepted Answer

Proportionally related to the depth of the reservoir

Answer

Proportionally related to the surface area of the reservoir

Answer

Independent of the reservoir's shape

Answer

Equal to atmospheric pressure

Question 30

The force exerted on a dam due to water pressure is known as:

Accepted Answer

Hydrostatic force

Answer

Buoyant force

Answer

Drag force

Answer

Frictional force

Question 31

The pressure gradient in a fluid is mathematically defined as the:

Accepted Answer

Rate of change in pressure per unit distance

Answer

Rate of change in velocity per unit distance

Answer

Rate of change in density per unit distance

Answer

Rate of change in temperature per unit distance

Question 32

The change in fluid pressure with respect to depth is described by:

Accepted Answer

Pascal's law

Answer

Bernoulli's equation

Answer

Poiseuille's law

Answer

Darcy's law

Question 33

An object submerged in a fluid experiences a buoyant force that is:

Accepted Answer

Equal to the weight of the fluid displaced by the object

Answer

Equal to the weight of the object

Answer

Less than the weight of the fluid displaced by the object

Answer

Greater than the weight of the fluid displaced by the object

Question 34

Which of the following factors does not affect the stability of a floating object?

Accepted Answer

Surface tension

Answer

Metacentric height

Answer

Center of gravity

Answer

Fluid density