Industrial Hydraulics And Pneumatics Quiz!

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  • 1/130 Questions

    Function of muffler in Pneumatic system is

    • To increase the noise of compressed air
    • To Reduce the noise of compressed air
    • Both a and b
    • None of the above
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About This Quiz

Dive into the essentials of industrial hydraulics and pneumatics with this focused quiz! Assess your understanding of hydraulic systems, compressor types, efficiency factors, and more. Perfect for learners aiming to enhance their technical skills in industrial applications.

Industrial Hydraulics And Pneumatics Quiz! - Quiz

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  • 2. 

    5/2 way single solenoid valve has:

    • 2 ports 2 positions

    • 5 ports 2 positions

    • 5 ports 5 positions

    • 2 ports 5 positions

    Correct Answer
    A. 5 ports 2 positions
    Explanation
    A 5/2 way single solenoid valve has 5 ports and 2 positions. This means that it has 5 openings or connections through which fluid can flow and it can be placed in 2 different positions. The valve can either allow fluid to flow from one port to another or block the flow completely, depending on its position.

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  • 3. 

    The circuit used to perform more than two operations in a sequence is known as…..

    • Sequencing circuit

    • Bleed-off circuit

    • By-pass circuit

    • None of the above

    Correct Answer
    A. Sequencing circuit
    Explanation
    A sequencing circuit is used to perform more than two operations in a sequence. It is designed to control the order and timing of operations in a circuit, ensuring that each operation occurs in the correct sequence. This type of circuit is commonly used in digital systems, where multiple operations need to be performed in a specific order to achieve the desired outcome.

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  • 4. 

    Which of the following systems generate more energy when used in industrial applications?

    • Hydraulic systems

    • Pneumatic systems

    • Both systems generate same energy

    •  cannot say

    Correct Answer
    A. Hydraulic systems
    Explanation
    Hydraulic systems generate more energy when used in industrial applications compared to pneumatic systems. This is because hydraulic systems use incompressible fluids to transmit power, which allows for higher force and torque output. In contrast, pneumatic systems use compressed air, which has lower energy density and cannot generate as much power as hydraulic systems. Therefore, hydraulic systems are more suitable for heavy-duty industrial applications that require higher energy output.

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  • 5. 

    Heavy lifting work is often accomplished by shifting fluids in big machines. The power system of such machines can be described as

    • Reciprocating

    • Pneumatic

    • Hydraulic

    • Hybrid

    Correct Answer
    A. Hydraulic
    Explanation
    The correct answer is hydraulic because hydraulic systems use fluids, typically oil, to transmit power and accomplish heavy lifting work. These systems work by applying force to a fluid, which then transfers the force to different parts of the machine, allowing it to perform tasks such as lifting heavy objects. Hydraulic systems are commonly used in construction equipment, such as cranes and excavators, as well as in industrial machinery. They offer high power and precision, making them suitable for heavy lifting work.

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  • 6. 

    During any operation in hydraulic system, oil prefers the path of

    • Least resistance

    • Maximum resistance

    • Both a and b

    • None of the above

    Correct Answer
    A. Least resistance
    Explanation
    In a hydraulic system, oil tends to flow through the path that offers the least resistance. This means that it will choose the path that allows for easier and smoother flow, rather than facing obstacles or restrictions. By following the path of least resistance, the oil can efficiently transmit force and power throughout the system, ensuring smooth operation.

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  • 7. 

    Which law explains the behaviour of hydraulic fluids under pressure?

    • Charles's law

    • Newtons law

    • Pascal's law

    • None of the above

    Correct Answer
    A. Pascal's law
    Explanation
    Pascal's law explains the behavior of hydraulic fluids under pressure. According to this law, the pressure applied to a fluid in a confined space is transmitted equally in all directions. This means that when pressure is applied to a hydraulic fluid, it will transmit that pressure throughout the fluid, allowing it to exert force on a larger area. This principle is the basis for hydraulic systems, where fluids are used to transmit and amplify forces. Charles's law is not relevant to hydraulic fluids, and Newton's law does not specifically address their behavior under pressure.

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  • 8. 

    Which of the following gas is used in gas charged accumulator?

    • Oxygen

    • Nitrogen

    • Carbon dioxide

    • All the above

    Correct Answer
    A. Nitrogen
    Explanation
    Gas charged accumulators are commonly used in hydraulic systems to store energy and provide a source of pressure. Nitrogen gas is typically used in gas charged accumulators because it is non-reactive, non-flammable, and readily available. Nitrogen gas also has a high compressibility, allowing it to store and release energy effectively. Oxygen and carbon dioxide are not commonly used in gas charged accumulators due to their reactivity and flammability. Therefore, the correct answer is nitrogen.

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  • 9. 

    A single acting cylinder can be pressurized externally from one direction only.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    A single acting cylinder is designed to move in one direction only. It can be pressurized externally from one direction, typically through a port on one end of the cylinder. The pressure causes the piston inside the cylinder to move in one direction, generating force or performing work. Once the pressure is released, the cylinder relies on other mechanisms, such as gravity or springs, to return to its original position. Therefore, the statement "A single acting cylinder can be pressurized externally from one direction only" is true.

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  • 10. 

    Intensifier used in pneumatic systems has output pressure

    • Less than input pressure

    • More than input pressure

    • Same as input pressure

    • None of the above

    Correct Answer
    A. More than input pressure
    Explanation
    In pneumatic systems, an intensifier is used to increase the pressure of the output fluid. This means that the output pressure is greater than the input pressure. Therefore, the correct answer is "more than input pressure."

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  • 11. 

    At low pressures, liquids are

    • Compressible

    • Non-compressible

    • Unpredictable

    • None of above

    Correct Answer
    A. Non-compressible
    Explanation
    Liquids are considered non-compressible because their molecules are already close together and have very little empty space between them. When pressure is applied to a liquid, the molecules can only move slightly closer together, resulting in a negligible change in volume. Therefore, liquids do not undergo significant compression under low pressures.

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  • 12. 

    Telescopic cylinders have

    • Only two stage units

    • Only three stage units

    • Two or three stage units

    • Multistage units

    Correct Answer
    A. Multistage units
    Explanation
    Telescopic cylinders are hydraulic cylinders that consist of multiple stages or sections that slide within one another to provide a longer stroke length. This design allows for a compact retracted length while still achieving a longer extended length, making them ideal for applications where space is limited. Therefore, the correct answer is multistage units, as telescopic cylinders can have two or three stages depending on the specific requirements of the application.

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  • 13. 

    Which of these actions does a hydraulic cylinder perform?

    •  pushing

    •  lifting

    • Both a and b

    • None of the above

    Correct Answer
    A. Both a and b
    Explanation
    A hydraulic cylinder is capable of performing both pushing and lifting actions. It uses hydraulic pressure to generate force and move a piston, which in turn pushes or lifts objects. The pushing action involves exerting force on an object to move it away, while the lifting action involves raising an object upwards. Therefore, the correct answer is both a and b.

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  • 14. 

    Which of the following is not the application of Hydraulics system

    • Dumper

    • Spray Painting

    • Cranes

    • Back hoe loader

    Correct Answer
    A. Spray Painting
    Explanation
    Spray painting is not an application of a hydraulic system. Hydraulics systems are commonly used in heavy machinery such as dumpers, cranes, and backhoe loaders to provide power and control. However, spray painting does not require the use of hydraulics. Instead, it typically relies on compressed air or other methods to propel paint particles onto a surface.

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  • 15. 

    A fluid used in hydraulic systems should have

    • Low oxidation resistance

    • High oxidation resistance

    • High oxidation enhancing ability

    • None of these

    Correct Answer
    A. High oxidation resistance
    Explanation
    The correct answer is high oxidation resistance. In hydraulic systems, the fluid is subjected to high temperatures and pressure, which can lead to oxidation. Oxidation can cause the fluid to degrade and form sludge and deposits, leading to reduced performance and potential damage to the system. Therefore, a fluid with high oxidation resistance is necessary to ensure the longevity and efficiency of the hydraulic system.

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  • 16. 

    What is the function of a flow control valve?

    • Flow control valve changes the direction of oil flow

    • Flow control valve can adjust the flow rate of hydraulic oil

    • Both a and b

    • None of the above

    Correct Answer
    A. Flow control valve can adjust the flow rate of hydraulic oil
    Explanation
    A flow control valve is a mechanical device used in hydraulic systems to regulate the flow rate of hydraulic oil. It allows the user to adjust and control the speed at which the oil flows through the system. By manipulating the valve, the flow rate can be increased or decreased, providing the desired amount of hydraulic power to different components of the system. Therefore, the correct answer is that a flow control valve can adjust the flow rate of hydraulic oil.

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  • 17. 

    What does the numbers in 4/2 valve mean?

    • 4 positions and 2 ways

    • 4 ways and 2 positions

    • 4 ways and 4 positions

    • None of the above

    Correct Answer
    A. 4 ways and 2 positions
    Explanation
    The numbers in a 4/2 valve refer to its configuration. "4 ways" means that the valve has four different ports or pathways through which the fluid can flow. "2 positions" means that the valve has two different positions or states in which it can be operated. Therefore, a 4/2 valve has four different pathways for fluid flow and can be operated in two different positions.

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  • 18. 

    The scientific principle that makes hydraulic systems possible is

    • Pascal’s principle

    • Boyle’s law

    • Bernoulli’s principle

    • The fluid flow principle

    Correct Answer
    A. Pascal’s principle
    Explanation
    Pascal's principle is the scientific principle that makes hydraulic systems possible. This principle states that when pressure is applied to a fluid in a closed system, it is transmitted equally in all directions. In a hydraulic system, this principle allows for the transmission of force through a confined fluid, enabling the amplification of force. By applying a small force to a small piston, for example, a larger force can be generated on a larger piston, allowing for the lifting or moving of heavy objects. Boyle's law, Bernoulli's principle, and the fluid flow principle are not directly related to the functioning of hydraulic systems.

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  • 19. 

    The circuit used during downward movement of actuator under heavy load to prevent its overrunning is called…

    •  Sequencing circuit

    • Bleed-off circuit

    • By-pass circuit

    • Counterbalance circuit

    Correct Answer
    A. Counterbalance circuit
    Explanation
    A counterbalance circuit is used during the downward movement of an actuator under heavy load to prevent its overrunning. This circuit helps to balance the weight of the load and provides resistance to the downward movement, ensuring that the actuator does not move too quickly or uncontrollably. By using a counterbalance circuit, the actuator can safely lower the load without causing any damage or overrunning.

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  • 20. 

    In a telescopic cylinder, as the number of stages increase

    • Diameter of piston rod also increases

    • Diameter of piston rod decreases

    • Diameter of the piston rod remains the same

    • None of the above

    Correct Answer
    A. Diameter of piston rod decreases
    Explanation
    In a telescopic cylinder, as the number of stages increase, the diameter of the piston rod decreases. This is because the telescopic cylinder consists of multiple stages or sections that slide into each other, allowing for a compact retracted length and an extended length when all stages are fully extended. In order to achieve this, the diameter of the piston rod needs to decrease with each stage to fit into the next stage. Therefore, as more stages are added, the diameter of the piston rod progressively decreases.

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  • 21. 

    Which of the following statements is true for standard hydraulic cylinder and a telescopic cylinder?

    • Telescopic and standard cylinders give same stroke length

    • Telescopic cylinders give lesser stroke length than standard cylinder

    • Telescopic cylinders give greater stroke length than standard cylinder

    • None of the above

    Correct Answer
    A. Telescopic cylinders give greater stroke length than standard cylinder
    Explanation
    Telescopic cylinders give greater stroke length than standard cylinders. This means that the piston of a telescopic cylinder can extend further than the piston of a standard hydraulic cylinder, allowing for a larger range of motion.

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  • 22. 

    Which of the following is a gas charged accumulator?

    • Bladder type

    • Spring loaded accumulator

    • Weighted accumulator

    • All the above

    Correct Answer
    A. Bladder type
    Explanation
    A gas charged accumulator is a device used to store energy in the form of pressurized gas. It consists of a bladder or diaphragm that separates the gas and the hydraulic fluid. When the hydraulic system is pressurized, the gas is compressed, and when the system pressure drops, the stored energy is released to provide additional power. The bladder type accumulator is a specific type of gas charged accumulator that uses a flexible bladder to separate the gas and fluid. It is commonly used in hydraulic systems to absorb shocks, dampen pressure fluctuations, and provide emergency power.

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  • 23. 

    Which type of motion is transmitted by hydraulic actuators?

    • Linear motion

    • Rotary motion

    • Both a and b

    • None of the above

    Correct Answer
    A. Both a and b
    Explanation
    Hydraulic actuators are capable of transmitting both linear and rotary motion. This is because hydraulic systems use fluid pressure to generate force and motion. In the case of linear motion, the fluid pressure is used to move a piston or a cylinder in a straight line. For rotary motion, the fluid pressure is used to rotate a shaft or a motor. Therefore, hydraulic actuators have the ability to transmit both types of motion depending on the design and configuration of the system.

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  • 24. 

    Which force causes vanes to come out of the rotor slots?

    • Centripetal force

    • Centrifugal force

    • Friction force

    • None of the above

    Correct Answer
    A. Centrifugal force
    Explanation
    When a rotor spins, the centrifugal force is responsible for causing the vanes to come out of the rotor slots. Centrifugal force is a fictitious force that appears to act outward on a body moving in a circular path. As the rotor rotates, the centrifugal force pulls the vanes away from the center, causing them to move outwards and come out of the rotor slots.

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  • 25. 

    A one-way valve that lets air into the reservoir of a compressor, but doesn’t let it out, is a

    • Check valve

    • Receiver valve

    • Control valve

    • Three way valve

    Correct Answer
    A. Check valve
    Explanation
    A check valve is a one-way valve that allows air to enter the reservoir of a compressor but prevents it from flowing back out. This type of valve is commonly used in compressors to ensure that air only flows in one direction, preventing any backflow or loss of pressure. It helps maintain the desired pressure level in the reservoir and prevents any potential damage to the compressor system.

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  • 26. 

    When only a portion of the oil is passed through the filter is known as

    • Surface filter

    • Depth filter

    • Full flow filter

    • By pass filter

    Correct Answer
    A. By pass filter
    Explanation
    A bypass filter refers to a situation where only a portion of the oil is directed through the filter. This can occur when there is a separate pathway or channel that diverts some of the oil flow away from the main filter. The purpose of a bypass filter is often to provide additional filtration for a smaller portion of the oil, while allowing the majority of the oil to bypass the filter altogether. This can be useful in situations where the full flow of oil would be too much for a single filter to handle, or when a more specialized or finer filtration is required for a smaller portion of the oil.

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  • 27. 

    In hydraulic systems,

    • The mechanical energy is transferred to the oil and then converted into mechanical energy

    • The electrical energy is transferred to the oil and then converted into mechanical energy

    • The mechanical energy is transferred to the oil and converted into electrical energy

    • None of the above

    Correct Answer
    A. The mechanical energy is transferred to the oil and then converted into mechanical energy
    Explanation
    In hydraulic systems, mechanical energy is transferred to the oil. This is achieved by using a pump to create pressure in the oil, which in turn allows the oil to transmit force and energy to other components of the system. The mechanical energy in the oil is then converted back into mechanical energy when it is used to drive a piston or other mechanical devices. This process allows hydraulic systems to efficiently transmit and control power in various applications.

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  • 28. 

    What is the principle of operation used in gear pumps?

    • Two gears rotate in same direction

    • Two gears rotate in opposite direction

    • Both a and b

    • None of the above

    Correct Answer
    A. Two gears rotate in opposite direction
    Explanation
    Gear pumps work on the principle of two gears rotating in opposite directions. As the gears rotate, they create a sealed chamber between the teeth of the gears and the pump casing. This chamber traps the fluid and moves it from the inlet to the outlet of the pump. The rotation of the gears creates a positive displacement, meaning a fixed amount of fluid is moved with each revolution of the gears. This principle allows gear pumps to be efficient and effective in pumping various fluids in industries such as automotive, chemical, and hydraulic systems.

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  • 29. 

    What causes internal leakage in internal gear pump?

    • Less tolerance level between the meshing surfaces

    • More tolerance level between the meshing surfaces

    • No tolerance between the meshing surfaces

    • None of the above

    Correct Answer
    A. More tolerance level between the meshing surfaces
    Explanation
    More tolerance level between the meshing surfaces can cause internal leakage in an internal gear pump. When there is a larger gap or clearance between the gears, it allows fluid to leak back from the discharge side to the suction side, resulting in internal leakage. This can occur due to wear and tear, improper assembly, or design flaws.

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  • 30. 

    What is the difference between pressure relief valve and pressure reducing valve?

    • Pressure reducing valve is connected between pump and tank line while pressure relief valve is connected between DCV and branch circuit

    • Pressure relief valve is always normally opened

    • Pressure reducing valve is connected between DCV and branch circuit while pressure relief valve is connected between pump and tank

    • None of the above  

    Correct Answer
    A. Pressure reducing valve is connected between DCV and branch circuit while pressure relief valve is connected between pump and tank
    Explanation
    The correct answer is that a pressure reducing valve is connected between the DCV (Directional Control Valve) and the branch circuit, while a pressure relief valve is connected between the pump and the tank. This means that a pressure reducing valve is used to control and reduce the pressure in a specific branch circuit, while a pressure relief valve is used to relieve excess pressure in the overall hydraulic system by diverting the flow back to the tank.

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  • 31. 

    When flow control valve with check valve is placed at inlet of the actuator is known as

    • Bleed off circuit.

    • Meter-in Circuit

    • Meter-out circuit

    • By-pass circuit

    Correct Answer
    A. Meter-in Circuit
    Explanation
    A flow control valve with a check valve placed at the inlet of the actuator is known as a meter-in circuit. In this circuit, the flow control valve regulates the flow of fluid into the actuator, while the check valve allows the fluid to flow freely in the reverse direction. This configuration ensures that the actuator receives a controlled flow rate, allowing for precise control of the actuator's speed and position.

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  • 32. 

    Where is an inter-cooler connected in a two stage compressor?

    • Inter-cooler is connected after the two stage compressor

    • Inter-cooler is connected between the two stages of the compressor

    • Inter-cooler is connected before the two stage compressor

    • None of the above

    Correct Answer
    A. Inter-cooler is connected between the two stages of the compressor
    Explanation
    In a two-stage compressor, an inter-cooler is connected between the two stages of the compressor. This is done to cool down the compressed air between the stages, as the compression process generates heat. By cooling the air, the inter-cooler helps to increase the efficiency and performance of the compressor. It also prevents excessive heat buildup, which can cause damage to the compressor components. Therefore, connecting the inter-cooler between the two stages is the correct placement to optimize the cooling process and ensure proper functioning of the compressor.

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  • 33. 

    The seals are used between the surfaces of moving hydraulic parts

    • Positive seal.

    • Non Positive seal

    • Static seal

    • Dynamic seal

    Correct Answer
    A. Dynamic seal
    Explanation
    A dynamic seal is the correct answer because it is used between the surfaces of moving hydraulic parts. Unlike static seals that are used between stationary components, dynamic seals are designed to prevent leakage and maintain the integrity of the hydraulic system when there is relative motion between the parts. These seals are typically used in applications where there is reciprocating or rotating motion, such as piston seals in hydraulic cylinders or shaft seals in rotary equipment. They are specifically designed to withstand the dynamic forces and pressures involved in these applications and provide an effective barrier against fluid leakage.

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  • 34. 

    Pumps used in hydraulic applications are

    • Positive displacement pumps

    • Variable displacement pumps

    • Fixed displacement pumps

    • All the above

    Correct Answer
    A. All the above
    Explanation
    The correct answer is "all the above" because pumps used in hydraulic applications can be positive displacement pumps, variable displacement pumps, or fixed displacement pumps. Positive displacement pumps deliver a fixed amount of fluid with each stroke, variable displacement pumps can adjust the amount of fluid delivered, and fixed displacement pumps deliver a fixed amount of fluid per revolution. Therefore, all three types of pumps can be used in hydraulic applications depending on the specific requirements and conditions.

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  • 35. 

    What is the relation between temperature and viscosity for hydraulic oil?

    • Temperature and viscosity vary linearly

    • As temperature decreases viscosity decreases at atmospheric pressure

    • As temperature increases viscosity decreases at atmospheric pressure

    • None of the above

    Correct Answer
    A. As temperature increases viscosity decreases at atmospheric pressure
    Explanation
    The correct answer is that as temperature increases, viscosity decreases at atmospheric pressure. This is because as the temperature of hydraulic oil increases, the molecules move faster and have more energy, causing them to flow more easily and reducing the resistance to flow, which results in a decrease in viscosity.

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  • 36. 

    The resistance offered to the flow of fluid inside a piston develops into

    • Pressure

    • Force

    •  stress

    • All of the above

    Correct Answer
    A. Pressure
    Explanation
    When fluid flows inside a piston, it encounters resistance due to the friction between the fluid and the piston walls. This resistance leads to the generation of pressure within the fluid. As the fluid pushes against the piston walls, it exerts a force on the piston. Additionally, the resistance and force can cause stress on the piston and the surrounding components. Therefore, all of the options - pressure, force, and stress - are correct explanations for the resistance offered to the flow of fluid inside a piston.

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  • 37. 

    How is the water content in High Water Fluids (HFA) compared to oil content?

    • More oil than water

    • Oil and water are in same proportion

    • More water than oil

    • Contains only water

    Correct Answer
    A. More water than oil
    Explanation
    High Water Fluids (HFA) contain more water than oil. This means that the water content in HFA is higher compared to the oil content.

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  • 38. 

    Radial piston pumps can have,

    • Cylinder block rotating and cam stationary

    • Cylinder block stationary and cam rotating

    • Both a and b

    • None of the above

    Correct Answer
    A. Both a and b
    Explanation
    Radial piston pumps can have both a rotating cylinder block and a stationary cam, as well as a stationary cylinder block and a rotating cam. This means that either the cylinder block or the cam can be rotating, while the other remains stationary. Therefore, both options a and b are correct.

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  • 39. 

    The seals prevents even a minute amount of fluid leakage is called

    • Positive seal.

    • Non Positive seal

    • Static seal

    • Dynamic seal

    Correct Answer
    A. Positive seal.
    Explanation
    A positive seal is a type of seal that effectively prevents any fluid leakage, even in very small amounts. It ensures a tight and secure closure, leaving no room for any leakage to occur. This is in contrast to a non-positive seal, which may allow some fluid to leak. Static seals are used when there is no relative motion between the sealing surfaces, while dynamic seals are used when there is relative motion. Therefore, the correct term for a seal that prevents even a minute amount of fluid leakage is a positive seal.

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  • 40. 

    What is viscosity index?

    • Effect of pressure on changes in viscosity

    • Effect of temperature on changes in viscosity

    • Effect of resistance between two surfaces

    • None of the above

    Correct Answer
    A. Effect of temperature on changes in viscosity
    Explanation
    Viscosity index refers to the measure of how the viscosity of a fluid changes with temperature. It indicates the fluid's resistance to flow at different temperatures. As temperature increases, the viscosity of most fluids decreases, meaning they become less resistant to flow. The viscosity index helps to determine how much the viscosity of a fluid changes with temperature, which is important in various industries, such as automotive and lubricants, where the performance of fluids under different temperature conditions is crucial.

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  • 41. 

    Why are hydraulic cylinders cushioned?

    • Cushioning decelerates the piston of a cylinder

    • Stress and vibrations can be reduced

    • Both a and b

    • None of the above

    Correct Answer
    A. Both a and b
    Explanation
    Hydraulic cylinders are cushioned to decelerate the piston and reduce stress and vibrations. This helps to prevent damage to the cylinder and other components, and ensures smoother and more controlled operation. By cushioning the piston, the hydraulic cylinder can absorb the energy generated during deceleration and dissipate it gradually, resulting in a more efficient and safer system. Additionally, cushioning helps to minimize noise and improve overall performance. Therefore, both options a and b are correct.

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  • 42. 

    Schedule no. of pipe is related to

    • Pressure

    • Temperature

    • Wall thickness

    • None of the above

    Correct Answer
    A. Wall thickness
    Explanation
    The schedule number of a pipe is related to its wall thickness. The schedule number is a standard designation that indicates the thickness of the pipe's wall. It is used in various industries to ensure compatibility and proper functioning of pipes in different applications. The higher the schedule number, the thicker the wall of the pipe. Therefore, the correct answer is wall thickness.

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  • 43. 

    Which of the following factors is considered while selecting a compressor?

    • Type of oil filter required

    • Volumetric efficiency

    • Viscosity of the liquids used

    • All the above

    Correct Answer
    A. Volumetric efficiency
    Explanation
    Volumetric efficiency is considered while selecting a compressor because it measures the actual amount of air that is delivered by the compressor compared to the theoretical amount of air that it should deliver. This factor is important because it determines the efficiency and performance of the compressor. By considering the volumetric efficiency, one can ensure that the compressor is capable of delivering the required amount of air for the specific application.

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  • 44. 

    Shuttle valve is known as

    • AND gate valve

    • NOR gate valve

    • OR gate valve

    • None of the above.

    Correct Answer
    A. OR gate valve
    Explanation
    A shuttle valve is a type of valve that allows fluid to flow from one input port to either of two output ports. It is commonly used in hydraulic systems to control the direction of fluid flow. In this context, it can be considered as an "OR gate valve" because it allows fluid to flow through either of the output ports if there is pressure at one of the input ports. Therefore, the correct answer is "OR gate valve".

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  • 45. 

    1. What is the maximum operating pressure of Pneumatic system?

    • 10 bar

    • 20 bar

    • 30 bar

    • 40 bar

    Correct Answer
    A. 10 bar
    Explanation
    The maximum operating pressure of a pneumatic system is 10 bar. This means that the system should not be operated at pressures higher than 10 bar to prevent any damage or failure.

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  • 46. 

    What is the relation between speed and flow rate for fixed displacement vane pump?

    • Flow rate increases with increase in speed of rotor

    • Flow rate decreases with increase in speed of rotor

    • Flow rate is constant and does not change with change in speed

    • None of the above

    Correct Answer
    A. Flow rate increases with increase in speed of rotor
    Explanation
    The correct answer is that the flow rate increases with an increase in the speed of the rotor. This is because a fixed displacement vane pump has a constant volume of fluid that it can pump per revolution. Therefore, as the speed of the rotor increases, more revolutions are completed in a given time, resulting in a higher flow rate.

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  • 47. 

    The ____________________ converts the compressed air energy into mechanical energy in the form of linear movement in one direction only.

    • Piston cylinders

    • Double acting cylinders

    • Single acting cylinders

    • Hydraulic pumps

    Correct Answer
    A. Single acting cylinders
    Explanation
    Single acting cylinders convert the compressed air energy into mechanical energy in the form of linear movement in one direction only. Unlike double acting cylinders, which can generate linear movement in both directions, single acting cylinders have a single port for air to enter and exit, allowing them to produce force and movement in only one direction. This makes them suitable for applications where movement in only one direction is required, such as in certain types of machinery or equipment. Hydraulic pumps, piston cylinders, and double acting cylinders do not have this limitation.

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  • 48. 

    Check valve is a type of

    • Pressure reducing valve

    • Pressure relief valve

    • Directional control valve

    • None of the above

    Correct Answer
    A. Directional control valve
    Explanation
    A check valve is a type of directional control valve. It allows fluid to flow in one direction and prevents backflow in the opposite direction. It is commonly used to control the flow of fluid in hydraulic systems. Unlike pressure reducing valves and pressure relief valves, which control the pressure of the fluid, a check valve specifically controls the direction of flow. Therefore, the correct answer is directional control valve.

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  • 49. 

    A pressure relief valve can be

    •  direct operated

    • Pilot operated

    • Solenoid operated

    • All the above

    Correct Answer
    A. All the above
    Explanation
    The correct answer is "all the above" because a pressure relief valve can be direct operated, pilot operated, or solenoid operated. Direct operated relief valves are controlled by the pressure in the system they are protecting. Pilot operated relief valves use a separate pilot valve to control the opening and closing of the main valve. Solenoid operated relief valves are controlled by an electric solenoid that opens or closes the valve based on electrical signals. Therefore, all three types of operation are possible for a pressure relief valve.

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Quiz Review Timeline (Updated): Jan 13, 2025 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Jan 13, 2025
    Quiz Edited by
    ProProfs Editorial Team
  • May 07, 2020
    Quiz Created by
    Anil Karanjkar

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