Fluid System MCQs - Fluid Mechanics

Fluid System MCQs - Fluid Mechanics: This section contains the multiple-choice questions and answers on the fluid mechanics chapter Dimensional and Model Analysis. practice these MCQs to learn and enhance the knowledge of Dimensional and Model Analysis.

List of Fluid Mechanics - Fluid System MCQs

1. What is the main principle behind the operation of a hydraulic press?

  1. Pneumatic compression
  2. Pascal's law
  3. Bernoulli's principle
  4. Archimedes' principle

Answer: B) Pascal's law


Hydraulic presses operate based on Pascal's law, which states that an applied pressure at any point in a confined fluid is transmitted undiminished throughout the fluid

2. What is the advantage of using a hydraulic press over a mechanical press for heavy-duty applications?

  1. Faster operation
  2. Lower cost
  3. Greater force amplification
  4. Simplicity of design

Answer: C) Greater force amplification


Hydraulic presses can provide significant force amplification, making them suitable for heavy-duty applications where a large force is required.

3. What is the primary function of a hydraulic accumulator in a fluid system?

  1. To filter the hydraulic fluid
  2. To store energy in the form of pressurized fluid
  3. To regulate the temperature of hydraulic fluid
  4. To control the flow rate of hydraulic fluid

Answer: B) To store energy in the form of pressurized fluid


Hydraulic accumulators store hydraulic energy by compressing hydraulic fluid, which can then be released to perform work when needed.

4. Which factor determines the amount of energy stored in a hydraulic accumulator?

  1. The size of the accumulator
  2. The type of hydraulic fluid used
  3. The speed of fluid flow
  4. The temperature of the hydraulic fluid

Answer: A) The size of the accumulator


The size of the hydraulic accumulator, including its volume and pressure rating, determines the amount of energy it can store.

5. What safety feature is often incorporated into hydraulic accumulators to prevent over-pressurization?

  1. Pressure relief valve
  2. Temperature sensor
  3. Flow control valve
  4. Filter element

Answer: A) Pressure relief valve


Pressure relief valves are commonly used in hydraulic accumulators to prevent over-pressurization and ensure system safety.

6. What happens when the capacity of a hydraulic accumulator is exceeded?

  1. The accumulator stops functioning
  2. The fluid becomes highly viscous
  3. The accumulator discharges excess fluid
  4. The accumulator explodes

Answer: C) The accumulator discharges excess fluid.


When the capacity is exceeded, the accumulator releases excess fluid to prevent damage.

7. What is the advantage of using hydraulic intensifiers in hydraulic systems?

  1. Reduced energy consumption
  2. Increased fluid storage capacity
  3. Enhanced filtration capabilities
  4. Improved flow rate control

Answer: A) Reduced energy consumption


Hydraulic intensifiers can increase fluid pressure without the need for large pumps, leading to reduced energy consumption.

8. What is the primary function of a hydraulic ram in a fluid system?

  1. To filter the fluid
  2. To pump fluid uphill
  3. To regulate the flow rate
  4. To increase fluid pressure

Answer: B) To pump fluid uphill


A hydraulic ram is designed to use the energy from flowing water to pump a portion of that water to a higher elevation, making it suitable for an uphill water supply.

9. Which of the following applications is most suitable for a hydraulic ram system?

  1. Cooling system for power plants
  2. Municipal water distribution
  3. Irrigation in hilly areas
  4. High-pressure water cleaning

Answer: C) Irrigation in hilly areas


Hydraulic rams are well-suited for providing water to remote areas with elevation differences, such as hilly terrain.

10. What is the advantage of using hydraulic lifts in automotive repair shops?

  1. They offer quicker lifting rates
  2. They are less expensive than other lifting mechanisms
  3. They require less maintenance
  4. They can lift heavy vehicles with ease

Answer: D) They can lift heavy vehicles with ease.


Hydraulic lifts are capable of lifting heavy vehicles, making them ideal for automotive repair shops.

11. Which hydraulic fluid property is crucial for maintaining consistent crane performance in different weather conditions?

  1. Viscosity
  2. Density
  3. Color
  4. Thermal conductivity

Answer: A) Viscosity


Viscosity affects the flow properties of hydraulic fluid and its performance in varying temperatures.

12. What happens to the power transmission efficiency of a fluid coupling at low speeds?

  1. It increases
  2. It decreases
  3. It remains constant
  4. It becomes erratic

Answer: B) It decreases


Efficiency decreases at low speeds due to greater slip in the coupling

13. What role does the pump play in a hydraulic torque converter?

  1. It pressurizes the transmission fluid
  2. It directs the flow of fluid
  3. It controls torque output
  4. It reduces fluid viscosity

Answer: A) It pressurizes the transmission fluid.


The pump in a hydraulic torque converter pressurizes the transmission fluid and drives it into the impeller.

14. In an air lift pump, which fluid is used as the driving force?

  1. Steam
  2. Air
  3. Oil
  4. Water

Answer: B) Air


In an air lift pump, compressed air is used as the driving force to lift water or other fluids.

15. In a gear wheel pump, what type of gear is commonly used?

  1. Helical gears
  2. Spur gears
  3. Worm gears
  4. Bevel gears

Answer: B) Spur gears


Gear wheel pumps typically use spur gears to create fluid flow due to their simplicity and efficiency.

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