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Fluid-mechanics Questions Set 9:

Quiz Mode

An oil has a kinematic viscosity of 2.3 × 10⁻⁴ m²/s and a specific gravity of 0.7. Calculate the dynamic viscosity.

0.10 kg/m·s

0.16 kg/m·s

0.21 kg/m·s

0.24 kg/m·s

Solution:

In a pitot-tube, the velocity of the flow at a specific point is reduced to zero. This point is called the:

Stagnation point

Critical point

Metacenter

Equilibrium point

Solution:

If we have the Absolute Coefficient of viscosity, what additional parameter is required to find the Kinematic Coefficient of viscosity?

Pressure

Density

Temperature

Time

Solution:

A Pelton wheel develops 2000 kW of power under a head of 100 metres while running at 300 r.p.m. and discharging 2500 litres of water per second. What is the unit speed of the wheel (in rpm)?

Solution:

The continuity equation is the result of the application of which of the following fundamental laws to the flow field?

Conservation of energy

First law of thermodynamics

Conservation of mass

Newton's second law of motion

Solution:

A cylinder contains 0.85 m³ of gas at 20°C and 2.5 bar pressure. After compression, the volume gets reduced to 0.25 m³. Determine the final pressure if the compression takes place under isothermal conditions.

8.5 × 10⁵ N/m²

12.5 × 10⁵ N/m²

23.5 × 10⁵ N/m²

None of the above

Solution:

A flat plate of 0.3 m² area is pulled at a constant velocity of 20 cm/s parallel to another stationary plate located at a distance of 0.01 cm. The space between the plates is filled with a fluid of dynamic viscosity 0.001 N⋅s/m². The force required to be applied is:

0.3 N

3 N

6 N

0.6 N

Solution:

In a venturimeter, which of the following statements is true?

The U-tube manometer's first end is connected to the diverging cone.

The angle of the diverging cone is smaller.

The U-tube manometer's second end is connected to the diverging cone.

The angle of the converging cone is smaller.

Solution:

If a fluid with certain surface tension and diameter is used to create a soap bubble and a liquid jet, which of the two, the bubble or the liquid jet, will have a greater pressure difference between the inside and outside?

Liquid jet

Soap bubble

None of the mentioned

Both will have the same pressure difference

Solution:

The vessel is half-filled with water and the air is pumped out from the hole near the top of the closed vessel. Choose the correct option.

The force by the water on the bottom of the vessel would decrease

The water level will rise up in the vessel.

Both 1 & 3

The pressure at the surface of the water will decrease

Fluid-mechanics Questions Set 9:

An oil has a kinematic viscosity of 2.3 × 10⁻⁴ m²/s and a specific gravity of 0.7. Calculate the dynamic viscosity.

Solution:

In a pitot-tube, the velocity of the flow at a specific point is reduced to zero. This point is called the:

Solution:

If we have the Absolute Coefficient of viscosity, what additional parameter is required to find the Kinematic Coefficient of viscosity?

Solution:

A Pelton wheel develops 2000 kW of power under a head of 100 metres while running at 300 r.p.m. and discharging 2500 litres of water per second. What is the unit speed of the wheel (in rpm)?

Solution:

The continuity equation is the result of the application of which of the following fundamental laws to the flow field?

Solution:

A cylinder contains 0.85 m³ of gas at 20°C and 2.5 bar pressure. After compression, the volume gets reduced to 0.25 m³. Determine the final pressure if the compression takes place under isothermal conditions.

Solution:

A flat plate of 0.3 m² area is pulled at a constant velocity of 20 cm/s parallel to another stationary plate located at a distance of 0.01 cm. The space between the plates is filled with a fluid of dynamic viscosity 0.001 N⋅s/m². The force required to be applied is:

Solution:

In a venturimeter, which of the following statements is true?

Solution:

If a fluid with certain surface tension and diameter is used to create a soap bubble and a liquid jet, which of the two, the bubble or the liquid jet, will have a greater pressure difference between the inside and outside?

Solution:

The vessel is half-filled with water and the air is pumped out from the hole near the top of the closed vessel. Choose the correct option.

Solution:

Related Question Sets:

Related Topics:

Fluid-mechanics Questions Set 9:

An oil has a kinematic viscosity of 2.3 × 10⁻⁴ m²/s and a specific gravity of 0.7. Calculate the dynamic viscosity.

Solution:

In a pitot-tube, the velocity of the flow at a specific point is reduced to zero. This point is called the:

Solution:

If we have the Absolute Coefficient of viscosity, what additional parameter is required to find the Kinematic Coefficient of viscosity?

Solution:

A Pelton wheel develops 2000 kW of power under a head of 100 metres while running at 300 r.p.m. and discharging 2500 litres of water per second. What is the unit speed of the wheel (in rpm)?

Solution:

The continuity equation is the result of the application of which of the following fundamental laws to the flow field?

Solution:

A cylinder contains 0.85 m³ of gas at 20°C and 2.5 bar pressure. After compression, the volume gets reduced to 0.25 m³. Determine the final pressure if the compression takes place under isothermal conditions.

Solution:

A flat plate of 0.3 m2 area is pulled at a constant velocity of 20 cm/s parallel to another stationary plate located at a distance of 0.01 cm. The space between the plates is filled with a fluid of dynamic viscosity 0.001 N⋅s/m2. The force required to be applied is:

Solution:

In a venturimeter, which of the following statements is true?

Solution:

If a fluid with certain surface tension and diameter is used to create a soap bubble and a liquid jet, which of the two, the bubble or the liquid jet, will have a greater pressure difference between the inside and outside?

Solution:

The vessel is half-filled with water and the air is pumped out from the hole near the top of the closed vessel. Choose the correct option.

Solution:

Related Question Sets:

Related Topics:

A flat plate of 0.3 m² area is pulled at a constant velocity of 20 cm/s parallel to another stationary plate located at a distance of 0.01 cm. The space between the plates is filled with a fluid of dynamic viscosity 0.001 N⋅s/m². The force required to be applied is: