APP2 Fluids Review (S1 Final Exam)

According to equation of continuity, A₁V₁ = A₂V₂ = constant. The constant is equal to:

• Flow rate

• Volume of fluid

• Mass of fluid

• Density of fluid

Velocity of fluid increases where the pressure differential is:

• Lower

• Greater

• Constant

• Zero

If cross-sectional area of pipe decreases, the speed of fluid must increase according to:

• Continuity equation

• Bernoulli's equation

• Torricelli's theorem

• Venture relation

Laminar flow is

• Unsteady and regular

• Steady and regular

• Unsteady and irregular

• Chaotic

A cube of wood with a density of 0.780 g/cm³ is 10.0 cm on each side. When the cube is placed in water, what buoyant force acts on the wood? ( density of water = 1.0 g/cm³)

• 7.65 x 10³ N

• 5.00 N

• 7.65 N

• 6.40 N

A water bed that is 1.5 m wide and 2.5 m long weighs 1055 N. Assuming the entire lower surface of the bed is in contact with the floor, what is the pressure the bed exerts on the floor?

• 250 Pa

• 260 Pa

• 270 Pa

• 280 Pa

A force of 30.0 N is exerted on a small piston of the hydraulic system. The cross-sectional area of the small piston is 0.05 m² and that of the large piston is 0.10 m². The weight of the object that the large piston can lift is ____.

• 60 N

• 40 N

• 100 N

• 150 N

A dam is constructed with wider and thicker base. Why is it wider and thicker at the base than at the top?

• Much water is at the base than at the top.

• Water is heavier at the base than at the top.

• Liquid pressure is greater at the base than at the top.

• It is easier to construct a structure with wider base & narrow top.

Which statement about force and pressure is correct?

• Force and pressure are the same but expressed in different units.

• Force is greater than pressure.

• Pressure depends on the force acting on a given area.

• Force is pressure per unit area.

Neglecting the effect of atmospheric pressure, the pressure at the bottom of a 5.0 m deep swimming pool filled with water is _______.

• 2.5 x 10³ kg/m²

• 49 x 10³ Pa

• 49 x 10³ N/m³

• 2.5 x 10⁴ N