WorksheetsHYDRAULICS PART 1 - 3
Total questions: 45
Worksheet time: 8hrs 30mins
What is the maximum density of water?
0°C
4°C
25°C
100°C
Cohesion refers to the attraction between:
Different molecules
Like molecules
Solid and liquid surfaces
Gases in a fluid
Adhesion refers to the attraction between:
Similar molecules
Molecules of different substances
Only gases
Only solids
The tendency of a liquid’s surface to minimize its area is due to:
Viscosity
Surface tension
Cohesion
Buoyancy
Kinematic viscosity is defined as the ratio of:
Absolute viscosity to density
Density to surface tension
Mass to volume
Pressure to velocity
A manometer is used to measure:
Fluid velocity
Pipe diameter
Pressure in pipes and channels
Atmospheric pressure
A barometer is specifically used to measure:
Fluid pressure in a pipe
Atmospheric pressure
Hydraulic gradient
Liquid viscosity
The difference between total pressure and hydrostatic pressure is known as:
Gauge pressure
Absolute pressure
Dynamic pressure
Vapor pressure
Which instrument is used to measure the pressure difference between two points?
Barometer
Differential manometer
Hydraulic press
Venturimeter
Pascal’s Law states that:
Pressure in a fluid acts equally in all directions
The velocity of a fluid remains constant
The pressure increases with depth
The density of a fluid remains unchanged
The buoyant force on an immersed body is equal to:
Its weight
The weight of the displaced fluid
Its volume
The surface tension
A vessel is in neutral equilibrium when:
Its metacenter is below the center of gravity
Its metacenter and center of gravity coincide
Its weight is greater than the buoyant force
It is submerged completely
The metacentric height is the distance between:
The center of gravity and the metacenter
The center of buoyancy and the water surface
The bottom of the vessel and the top
The center of pressure and the fluid surface
What happens to a floating body when slightly displaced from equilibrium?
It remains in its new position
It oscillates about the metacenter
It sinks
It rises above the surface
The condition for stable equilibrium of a floating body is that:
The metacenter must be below the center of gravity
The metacenter must be above the center of gravity
The buoyant force must be zero
The center of pressure must be at the bottom
Bernoulli’s equation is based on the principle of:
Conservation of mass
Conservation of energy
Conservation of momentum
Conservation of pressure
Bernoulli’s equation states that the sum of pressure head, velocity head, and potential head is:
Constant along a streamline
Always decreasing
Dependent on viscosity
Zero for all fluids
The hydraulic gradient line (HGL) represents:
The sum of kinetic, pressure, and potential energy
The pressure and potential energy in a flowing fluid
Only the kinetic energy of a fluid
The absolute pressure in a pipe
The energy grade line (EGL) is always:
Above the hydraulic gradient line
Below the hydraulic gradient line
Equal to the velocity head
The same as the pressure head
The kinetic head in a flow system is given by:
Velocity squared divided by twice the acceleration due to gravity
Density multiplied by velocity
Pressure divided by volume
The sum of pressure and gravitational force
Frictional losses in long pipes are classified as:
Major losses
Minor losses
Dynamic losses
Static losses
Minor losses in pipe flow occur due to:
Pipe length
Change in velocity or direction
Constant flow rate
Atmospheric pressure variations
The term "hydraulic radius" is used to determine:
Pipe thickness
Flow efficiency in open channels
Pressure in a pipeline
The volume of fluid displaced
The hydraulic radius is defined as:
Flow rate divided by velocity
The ratio of the cross-sectional area to the wetted perimeter
The depth of flow in a channel
The density of the fluid
A larger hydraulic radius in an open channel leads to:
Increased frictional losses
Reduced flow velocity
Improved flow efficiency
A decrease in water level
The velocity of fluid flow in a pipeline is commonly measured using:
Manometer
Pitot tube
Barometer
Hydraulic press
A venturimeter is used to measure:
Pressure difference
Fluid velocity
Flow rate
Fluid viscosity
The continuity equation states that for an incompressible, steady flow:
Mass flow rate remains constant
Velocity remains constant everywhere
Pressure remains constant
The volume of fluid increases with pressure
The equation of continuity is expressed as:
A1V1 = A2V2
P1 + ½ρV1² = P2 + ½ρV2²
F = ma
Q = AV
The energy loss in turbulent flow is primarily due to:
Viscosity
Surface tension
Friction and eddies
Temperature variations
The stability of a floating body is determined by its:
Center of buoyancy
Center of pressure
Metacentric height
Volume
A ship is more stable if the metacentric height is:
Zero
Large
Small
Negative
A floating body in neutral equilibrium will:
Capsize immediately
Return to its original position
Stay in its displaced position
Sink completely
The weight of a floating object is equal to:
Its volume
The weight of the displaced fluid
The density of water
The sum of buoyant force and gravity
An object will float if:
Its weight is greater than the buoyant force
Its density is less than that of the fluid
The gravitational force exceeds the buoyant force
It is completely submerged
Pascal’s Law is fundamental in the operation of:
Venturimeters
Hydraulic presses
Differential manometers
Centrifugal pumps
The principle of Pascal’s Law states that:
Pressure increases with velocity
Fluids exert pressure equally in all directions
The total energy of a fluid is constant
Fluid flow is inversely proportional to its density
A hydraulic lift works on the principle of:
Bernoulli’s theorem
Pascal’s Law
Newton’s third law
The equation of continuity
Hydraulic systems transmit force by using:
Atmospheric air
Compressed gases
Incompressible liquids
Steam pressure
The main advantage of hydraulic systems is:
Increased velocity
High-pressure transmission with small force
Reduced friction losses
Increased turbulence
Water hammer is caused by:
A sudden change in velocity
A decrease in temperature
The increase in density
Increased buoyant force
Which method is used to minimize water hammer in pipelines?
Using slow-closing valves
Increasing pipe diameter
Decreasing fluid density
Reducing flow velocity
The main function of a surge tank in a hydraulic system is to:
Store excess water
Reduce pressure fluctuations
Increase velocity
Convert kinetic energy into pressure energy
Hydraulic gradient line (HGL) represents:
Total head in a system
The pressure and potential energy of the flow
The velocity of flow
The mass of the fluid
The efficiency of an open channel can be improved by:
Reducing the wetted perimeter
Increasing surface roughness
Decreasing hydraulic radius
Increasing the slope angle
