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WorksheetsElective Physics 2 - Pre Test
Total questions: 25
Worksheet time: 25mins
It is the branch of fluid mechanics that studies incompressible fluids at rest.
Thermodynamics
Fluid Mechanics
Fluid Statics
Solid Mechanics
A person wearing steel toe capped boots and a person wearing stiletto heels stand on a wooden floor. They both have the same weight. Which person exerts a greater pressure on the floor?
The person wearing the boots because the boots have a larger surface area in contact with the floor.
The person wearing the boots because the boots have a smaller surface area in contact with the floor.
The person with the stiletto heels because they have a larger surface area in contact with the floor.
The person with the stiletto heels because they have a smaller surface area in contact with the floor.
Fluids can be...
liquids
solids
liquids or gases
gases
Which statement correctly describes pressure?
force per unit area
force times surface area
the area to which a force is applied
the applied force that acts on an object
What is the greatest benefit of using hydraulics?
The multiplication of operating time.
The multiplication of force.
The multiplication of fuel efficiency.
The multiplication of speed.
TRUE or FALSE
"If the weight of the water displaced is the same as the weight of the object placed in the water, the object will sink".
TRUE
FALSE
The density of water is 1g/cm^3. A substance will float if its density is less than that of water. Which of the following substance will float?
substance 1
substance 2
substance 3
substance 4
What happens to the buoyant force acting on the airship as it rises in the air?
Buoyant force increases.
Buoyant force decreases.
Buoyant force remains constant.
Buoyant force first increases then shows decrease.
The density of gasoline is 721 kilograms per cubic meter. What is its specific gravity?
0.072
0.731
1.72
0.721
Which of the following is a statement of Archimedes' principle?
Buoyant force is the weight of the mass of water displaced by an immersed object.
Buoyant force is the weight of the surface area displaced by an immersed object.
Buoyant force is the weight of the volume of water displaced by an immersed object.
Buoyant force is the weight of the mass of an immersed object.
Which relates the speed of a fluid moving through a pipe to the cross - sectional area of the pipe?
Pascal's principle
Bernoulli's principle
Equation of continuity
Conservation of velocity
The pressure of water - or any other fluid - is reduced when it flows at a higher speed. This fact is known as __________.
Bernoulli's Principle
Archimedes' Principle
Continuity of Equation
Pascal's Principle
Which comparison is correct
F1 = F2
F1 > F2
P1 < P2
P1 = P2
The figure shows an aero foil. Which of the following statements is TRUE?
V1 is smaller than V2 but P1 is smaller than P2
V1 is greater than V2 but P1 is smaller than P2
V1 is greater than V2 but P1 is greater than P2
V1 is smaller than V2 but P1 is smaller than P2
The diagram shows a spurting cylinder with water spurting out at A, B and C.
Which one of the following statements is correct?
The spout with the least pressure pushes the water furthest.
The spout with the greatest pressure pushes the water furthest.
Water at C travels the furthest because there is more water at the bottom of the cylinder.
The pressure at spout A is greater than the pressure at spout B.
Which is TRUE about Newtonian fluid?
Newtonian fluid obeys Hooke’s law.
Newtonian fluid is compressible.
Newtonian fluid obeys Newton’s law of viscosity.
Newtonian fluid is incompressible.
If the Reynolds number is less than 2000, the flow in a pipe is
laminar
turbulent
transition
rotational
Which is TRUE about the continuity equation?
The continuity equation is the result of the application of the law of conservation of mass to the flow field.
The continuity equation is the result of the application of the law of conservation of energy to the flow field.
The continuity equation is the result of the application of the third law of thermodynamics to the flow field.
The continuity equation is the result of the application of the law of viscosity to the flow field.
Which best describes the fluid property 'viscosity'?
Viscosity is the ratio of the density of a substance to that of a standard substance.
Viscosity is the tendency of liquid surfaces to shrink into the minimum surface area possible.
Viscosity is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.
Viscosity is the measure of the fluid's resistance to deformation at a given rate.
Why is the bottom of the dam is thicker than the top of the dam?
The necessity of having a thick bottom is a result of the volume of the water behind the dam.
The necessity of having a thick bottom is a result of the altitude of the body of water behind the dam.
The necessity of having a thick bottom is a result of the depth of the water behind the dam.
The necessity of having a thick bottom is a result of the community surrounding the dam.
What is the external output force if the area of A1 = 0.001 m2 and the area of A2 = 0.1 m2 while the external input force F1 = 100 N?
10 000 N
1000 N
100 N
10 N
The pressure that seawater exerts on a submerged submarine is called
liquid pressure
submerged pressure
underwater pressure
hydrostatic pressure
The Pascal law states that liquid at rest applies pressure at a point is ________ in all directions.
unstable
perpendicular
unequal
same
These are devices that use liquids to transmit pressure from one point to another.
simple machines
hydraulics
pneumatics
lever
Who stated that "the buoyant force on an object in a fluid is an upward force equal to the weight of the volume of fluid that the object displaces"?
Archimedes
Daniel Bernoulli
Blaise Pascal
Isaac Newton
