MCQ on Hydraulics and Pneumatics

MCQ on Hydraulics and Pneumatics: Hydraulic and pneumatic technology is a technology with a long history, mature development, and extremely wide application. It has become a basic technology including transmission, control, and detection, which has an important impact on the technological progress of modern mechanical equipment.

Due to its unique principle and performance, its applications are in various fields of the national economy, such as machine tools, construction machinery, transportation, metallurgical machinery, agricultural machinery, plastic machinery, forging machinery, aviation, aerospace, navigation, weapons, oil, and coal. widely used in many aspects. Here below we have given some MCQ on Hydraulics and pneumatics.

MCQ on Hydraulics and Pneumatics with Answers

1. What are the divisions of hydromechanics?
a. hydraulic engineering and hydrogeology
b. technical mechanics and theoretical mechanics
c. hydraulics and hydrology
d. mechanics of liquid bodies and mechanics of gaseous bodies
Answer: b. technical mechanics and theoretical mechanics
Explanation: Hydromechanics is divided into technical mechanics (practical application of fluid mechanics) and theoretical mechanics (study of fluid mechanics principles).

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2. What is a liquid?
a. a physical substance capable of filling voids;
b. a physical substance that can change shape under the action of forces
c. a physical substance capable of changing its volume;
d. a physical substance capable of flowing.
Answer: b. a physical substance that can change shape under the action of forces
Explanation: A liquid is a state of matter characterized by having a definite volume but no definite shape, allowing it to change shape under the action of external forces.

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3. Which of these liquids is not drip?
a. mercury
b. kerosene
c. oil
d. nitrogen
Answer: d. nitrogen
Explanation: Nitrogen is a gas at room temperature and pressure, not a liquid. The other options (mercury, kerosene, oil) are liquids.

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4. A real fluid is a fluid __
a. does not exist in nature;
b. under real conditions
c. in which there is internal friction
d. able to evaporate quickly.
Answer: b. under real conditions
Explanation: A real fluid behaves according to the laws of fluid mechanics under actual physical conditions, as opposed to an idealized fluid.

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5. Which of these liquids is not gaseous?
a. liquid nitrogen
b. mercury
c. hydrogen
d. oxygen
Answer: b. mercury
Explanation: Mercury is a liquid at room temperature and pressure. The other options (liquid nitrogen, hydrogen, oxygen) are gases.

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6. The study of pneumatics deals with the system operated with___________
a. Oil
b. solid
c. Water
d. Air
Answer: d. Air
Explanation: Pneumatics deals with systems that use compressed air to transmit and control energy.

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7. The study of the LPG fueled system is the example of______
a. Hydraulics
b. Pneumatics
c. All of the above
d. None of the above
Answer: b. Pneumatics
Explanation: LPG (liquefied petroleum gas) is a gas, and systems that use it are examples of pneumatics.

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8. Which of the following is a type of actuator in a hydraulic system?
a. pump
b. Valve
c. Strainer
d. Cylinder
Answer: d. Cylinder
Explanation: A cylinder is a common type of actuator in hydraulic systems, converting fluid pressure into linear motion.

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9. Which of the following is an example of stationary hydraulics?
a. Agricultural machinery
b. Construction machinery
c. Metal forming presses
d. Platform lifts
Answer: c. Metal forming presses
Explanation: Metal forming presses are examples of stationary hydraulic systems used in manufacturing processes.

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10. In a pneumatic system, an AND gate is known as a _
a. non-return valve
b. gate valve
c. check valve
d. double pressure valve
Answer: d. Double pressure valve
Explanation: In a pneumatic system, a double pressure valve functions similarly to an AND gate, allowing air to flow only when both input pressures are present.

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11. The dashed line is the symbol for______
a. Flow line
b. Drain line
c. Pressure line
d. Component Envelope
Answer: b. Drain line
Explanation: In pneumatic diagrams, dashed lines typically represent drain lines used to remove condensate or excess fluid from the system.

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12. The power source in the pneumatic system is _
a. Air tank
b. Compressor
c. Valve
d. Silencer
Answer: b. Compressor
Explanation: A compressor is used to pressurize air and serve as the power source in pneumatic systems.

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13. The hydraulic system is_____
a. Less accurate than a pneumatic system
b. More precise than a pneumatic system
c. Both hydraulic and pneumatic systems are the same based on accuracy.
d. None of the dice
Answer: b. More precise than a pneumatic system
Explanation: Hydraulic systems are generally more precise than pneumatic systems due to the incompressibility of liquids and greater control over fluid flow.

Hope you like these MCQ on Hydraulics and Pneumatics.