Hydraulics and Pneumatics MCQs
Hydraulics and Pneumatics MCQs
Answer these Hydraulics and Pneumatics MCQs and assess your grip on the subject of Hydraulics and Pneumatics.
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1: What is an accumulator?
A. A device for storing electrical energy
B. A container in which fluid is stored under pressure as a source of fluid power.
C. A device used to measure the quantity of heat
D. A device that increases the voltage of an alternating current
2: What is a Hydro pneumatic accumulator?
A. A device in which the Liquid and gas are not separated by an elastic bag or bladder.
B. A device in which the liquid and gas are separated by an inelastic bag or bladder.
C. A device in which the liquid and gas are separated by an permeable bag or bladder.
D. A device in which the liquid and gas are separated by an elastic bag or bladder.
3: What is the modulus of elasticity for acetal plastic?
A. Medium
B. Low
C. Negative
D. High
4: What is an active device?
A. A device that does not require a power supply
B. A device with no inputs
C. A device that has an input(s) that controls a power supply to the device.
D. A device with only outputs
5: What is an actuator?
A. A device that changes the pressure
B. A device in which power is transferred from one pressurized medium to another without intensification.
C. A device that increases pressure
D. A device that decreases pressure
6: A device in which power is transferred from one pressurized medium to another without intensification is called?
A. Indicator
B. Actuator
C. Amplifier
D. Transmitter
7: What is the meaning of "additive"?
A. Something that is added
B. A chemical added to fluid to impart new properties or to enhance those that already exist.
C. The act of adding two or more things
D. A device used to add things together
8: What is an air motor?
A. A device that converts pneumatic fluid power into mechanical torque and motion
B. A device that uses compressed air to drive a piston
C. A device that generates electrical energy from air pressure
D. A device that uses air pressure to create mechanical motion
9: What does air at any pressure greater than atmosphere mean?
A. Air, Uncompressed (pressure)
B. Air, Composed of Oxygen and Nitrogen
C. Air, a Mixture of Gases
D. Air, Compressed (pressure)
10: What is air at any pressure greater than atmosphere called?
A. Compressed air
B. Decompressed air
C. Compressed
D. Air
11: What does the term "air dried" mean?
A. Air that has been heated
B. Air with a high moisture content
C. Air with moisture content lower than the maximum allowed for a given application.
D. Air that has been cooled
12: What is air with moisture content lower than the maximum allowed for a given application?
A. Moist air
B. Humid air
C. Dried air
D. Wet air
13: What is the legal definition of "air?"
A. Air at ambient temperature, pressure, relative humidity and density.
B. A colorless, odorless, tasteless gas
C. Any mixture of nitrogen, oxygen, and other gases
D. An Invisible gaseous substance
14: What is air at 100% relative humidity with a dew point equal to temperature called?
A. Unsaturated
B. Saturated
C. Humid
D. Supersaturated
15: What is the dew point of Saturated Air?
A. 0°C
B. Lower than the temperature
C. Higher than the temperature
D. Equal to the temperature
16: What is the standard temperature of "standard air" in gas industries?
A. 32.0° F
B. 60.8° F
C. 75.0° F
D. 68.8° F
17: What is air mainly composed of?
A. Nitrogen, oxygen
B. Nitrogen, oxygen, argon, carbon dioxide, hydrogen, water vapour, dust particles, pollen
C. Water vapour, dust particles, pollen
D. Nitrogen, oxygen, argon, carbon dioxide, hydrogen
18: What does an air bleeder do?
A. Moves air
B. Removes air
C. Creates air
D. Stores air
19: What is an air bleeder?
A. A device for the removal of air.
B. A device for the regulation of air.
C. A device for the addition of air
D. A device for the measurement of air
20: What does an air breather do?
A. Increases the oxygen content in the air
B. Purifies the air in a room
C. Permits air movement between atmosphere and the component in which it is installed
D. Equalizes air pressure
21: What is the meaning of "air breather"?
A. A person who is extremely passionate about air
B. A device permitting air movement between atmosphere and the component in which it is installed
C. An individual who only breathes air
D. A machine that produces air
22: What does an air motor do?
A. Converts pneumatic power into mechanical force and motion
B. Converts solar power into mechanical force and motion
C. Stores pneumatic power
D. Converts electrical power into mechanical force and motion
23: What is the term for the ratio between the output signal variations and the control signal variations for analog devices only?
A. Modulation
B. Feedback
C. Amplification
D. Decibels (dB)
24: What does AP stands for?
A. Absolute Power
B. Amplitude Power
C. Amplification, Power
D. Average Power
25: What is the ratio between the output power variation and the corresponding input (control) power variation called?
A. Voltage
B. Capacitance
C. Amplification
D. Power
26: What is the ratio between the outlet pressure and the inlet (control) pressure?
A. Pitch
B. Amplification
C. Decibels
D. Volume
27: What is the name of the gas law that states that equal volumes of all gases contain the same number of molecules?
A. Avogadro's Law
B. Charles's Law
C. Newton's Law
D. Boyle's Law
28: Bernoulli's Law applies to ____________.
A. An object in motion
B. A flowing friction-filled liquid
C. A flowing frictionless liquid
D. A static liquid
29: What is a bleed orifice?
A. A placement that helps to direct pressure
B. A small hole that helps the valve to open or close using the line pressure
C. A machine that helps to create pressure
D. A device that helps to measure pressure
30: The absolute pressure of a fixed mass of gas varies inversely as what?
A. The mass
B. The amount of gas
C. The volume
D. The temperature
31: Boyle's Law states that the pressure of a fixed mass of gas:
A. Varies inversely as the volume
B. Varies directly as the temperature
C. Varies inversely as the temperature
D. Varies directly as the volume
32: What is the definition of "breakout?"
A. Breakout is when something goes wrong
B. Breakout is a board game
C. Force necessary to inaugurate sliding
D. Breakout is when you escape from prison
33: What is the meaning of "breakout"?
A. The force necessary to inaugurate sliding.
B. The force necessary to stop sliding.
C. The force necessary to keep an object in motion.
D. The force necessary to increase the speed of an object.
34: What is Breathing Capacity a measure of?
A. Flow rate through an air breather
B. The maximum amount of air that can be breathed in
C. The ability to take deep breaths
D. The amount of oxygen that can be dissolved in blood
35: What is breathing capacity?
A. The process of drawing air into the lungs and then expelling it.
B. The ability of blood to carry oxygen to cells.
C. The amount of oxygen in the air.
D. A measure of flow rate through an air breather.
36: What is bulk modulus?
A. The compressibility of a fluid
B. The resistance of a fluid to shearing
C. The measure of resistance to compressibility of a fluid.
D. The amount of fluid a container can hold
37: What is the measure of resistance to compressibility of a fluid?
A. Density
B. Viscosity
C. Volume
D. Bulk Modulus
38: What is cavitation?
A. The freezing of a liquid
B. The formation of foam in aqueous solutions
C. A localized gaseous condition within a liquid stream that occurs where the pressure is reduced to the vapor pressure.
D. The breakdown of a liquid into its component molecules
39: What is Charles' Law?
A. The volume of a fixed mass of gas varies directly with the pressure, provided the temperature remains constant.
B. The volume of a fixed mass of gas varies inversely with absolute temperature, provided the pressure remains constant.
C. The volume of a fixed mass of gas varies directly with absolute temperature, provided the pressure remains constant.
40: What happens to the volume of a fixed mass of gas when the absolute temperature decreases?
A. The volume increases
B. The volume decreases
C. The volume stays the same
D. The pressure decreases
41: What does the term "Metered-In" mean in the context of the definition?
A. The supply flow to the actuator is regulated
B. The actuator is powered by a meter
C. The speed of the circuit is measured
D. The term is undefined
42: What does the acronym "MET" stand for in "Metered-Out"?
A. Metered-Out
B. Meter Out
C. Minimum Efficiency Technologies
D. Maximum Efficiency Turbine
43: What is a circuit that established the order in which two or more phases of a circuit occur?
A. Sequential circuit
B. Digital circuit
C. Parallel circuit
D. Logic gate
44: What is the Compression Set?
A. The amount by which a rubber specimen returns to its original shape after release of the compressive load.
B. The amount by which a rubber specimen fails to return to original shape after release of the compressive load.
C. The amount by which a rubber specimen returns to its original shape after application of the compressive load.
D. The amount by which a rubber specimen fails to return to original shape after application of the compressive load.
45: What is compressibility?
A. The change in temperature of a unit volume of a fluid when subjected to a unit change in pressure.
B. The change in pressure of a unit volume of a fluid when subjected to a unit change in volume.
C. The change in density of a unit volume of a fluid when subjected to a unit change in pressure.
D. The change in volume of a unit volume of a fluid when subjected to a unit change in pressure.
46: What is a compressor?
A. A device that converts mechanical force and motion into pneumatic fluid power.
B. A device that increases the pressure of a gas
C. A device used to create negative pressure
D. A device that uses mechanical energy to create compressed air
47: What is the process of changing a vapor into a liquid condensate by the extraction of heat?
A. Sublimation
B. Evaporation
C. Condensation
D. Deposition
48: What does a conductor do?
A. Store fluid
B. Transmit electricity
C. Generate electricity
D. Direct fluid
49: What is the primary function of a conductor?
A. Convert energy into sound waves.
B. Contain and direct fluid.
C. To store electrical energy.
D. Allow current to flow through it.
50: What is a desiccant?
A. A type of air compressor
B. A material that tends to remove moisture from compressed air.
C. A device used to measure air pressure.
D. A tool used to compress air
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