# 2A551 CDCs Volume 2 Of 3 UREs

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• 1.

### The maintenance stand with an adjustable height of 13 to 20 feet is the

• A.

B-1

• B.

B-2

• C.

B-4

• D.

B-5

B. B-2
Explanation
The correct answer is B-2. This is because the given question states that the maintenance stand has an adjustable height of 13 to 20 feet. Among the options provided, B-2 is the only one that falls within this height range. Therefore, B-2 is the correct answer.

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• 2.

### Of the following, the maintenance stand that is a scissor-type is the

• A.

B-1

• B.

B-2

• C.

B-4

• D.

C-1

C. B-4
Explanation
The correct answer is B-4. A scissor-type maintenance stand refers to a type of stand that has a scissor-like mechanism for height adjustment. This type of stand is commonly used in aviation maintenance to provide a stable and adjustable platform for technicians to work on aircraft. The B-4 option is the only one that indicates a scissor-type stand, making it the correct answer.

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• 3.

### The type of jack normally used to change a tire on the aircraft is the

• A.

Axle

• B.

Tail

• C.

Nose

• D.

Fixed-height

A. Axle
Explanation
The correct answer is axle because the axle is the part of the aircraft that supports the weight and allows the wheels to rotate. When changing a tire on an aircraft, a jack is typically used to lift the aircraft off the ground, and this jack is specifically designed to fit and support the axle. The axle jack provides stability and ensures that the aircraft is safely raised for tire maintenance.

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• 4.

### The boiling point of liquid oxygen (LOX) is

• A.

-183 degrees C

• B.

-183 degrees F

• C.

-297 degrees C

• D.

-297 degrees F

D. -297 degrees F
Explanation
Liquid oxygen (LOX) has a boiling point of -297 degrees Fahrenheit. Boiling point refers to the temperature at which a substance changes from its liquid state to its gaseous state. In the case of LOX, it boils and becomes a gas at -297 degrees Fahrenheit. This extremely low boiling point is due to the fact that oxygen molecules have weak intermolecular forces, which makes it easier for them to escape the liquid phase and become a gas.

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• 5.

### The low- and high-pressure capabilities, as a measured in pounds per square inch gage (psig), of the NSU-L75 nitrogen-servicing unit are

• A.

0-300; 300-3,500

• B.

0-300; 300-3,600

• C.

0-350; 350-3,500

• D.

0-350; 350-3,600

D. 0-350; 350-3,600
Explanation
The correct answer is 0-350; 350-3,600. This answer indicates that the low-pressure capabilities of the NSU-L75 nitrogen-servicing unit range from 0 to 350 psig, while the high-pressure capabilities range from 350 to 3,600 psig. This means that the unit is able to handle a wide range of pressures, making it versatile for various nitrogen-servicing applications.

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• 6.

### The high-pressure pump provides a hydraulic filler pressurization unit with a maximum pressure of

• A.

2,000 psi

• B.

2,500 psi

• C.

3,000 psi

• D.

3,500 psi

C. 3,000 psi
Explanation
The high-pressure pump in a hydraulic filler pressurization unit is responsible for providing the necessary pressure to operate the system. In this case, the correct answer is 3,000 psi, which means that the pump can generate a maximum pressure of 3,000 pounds per square inch. This level of pressure is important to ensure that the hydraulic system functions properly and can handle the required tasks efficiently. It is higher than the other options provided, indicating that it is the most suitable choice for the given situation.

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• 7.

### The model 4000 engine trailer can support a maximum load of

• A.

7,000 pounds

• B.

8,000 pounds

• C.

9,000 pounds

• D.

10,000 pounds

B. 8,000 pounds
Explanation
The model 4000 engine trailer is capable of supporting a maximum load of 8,000 pounds. This means that the trailer is designed and built to handle weights up to 8,000 pounds without any issues or risks of damage. It is important to adhere to this weight limit to ensure the safety and proper functioning of the trailer during transportation.

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• 8.

### The usable pressure range, as measured in pounds per square inch (psi), of the MC-1A air compressor is

• A.

0-200

• B.

0-350

• C.

0-3,200

• D.

05-3,500

C. 0-3,200
Explanation
The usable pressure range of the MC-1A air compressor is 0-3,200 psi. This means that the compressor is capable of producing air pressure within this range. It can be adjusted to deliver air at any pressure between 0 and 3,200 psi, providing flexibility for different applications that require varying levels of pressure.

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• 9.

### The MC-2A air compressor is capable of delivering air at a maximum pressure, measured in pounds per square inch (psi), of

• A.

200

• B.

300

• C.

3,500

• D.

3,600

A. 200
Explanation
The MC-2A air compressor is capable of delivering air at a maximum pressure of 200 psi.

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• 10.

### The H-1 heater has an adjustabl heat output that ranges from

• A.

100 degrees F to 230 degrees F

• B.

115 degrees F to 250 degrees F

• C.

125 degrees F to 270 degrees F

• D.

150 degrees F to 280 degrees F

D. 150 degrees F to 280 degrees F
Explanation
The H-1 heater has an adjustable heat output that ranges from 150 degrees F to 280 degrees F.

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• 11.

### The stationary, skid-mounted power unti that produces aircraft electrical power for use in shops and hangars is the

• A.

A/M32S-95

• B.

MK-3A

• C.

MD-4

• D.

MB-2

C. MD-4
Explanation
The correct answer is MD-4. The MD-4 is a stationary, skid-mounted power unit that is used to produce aircraft electrical power for use in shops and hangars. It is specifically designed for this purpose and is a reliable and efficient power unit. The A/M32S-95, MK-3A, and MB-2 are not specifically designed for this purpose and may not be suitable for generating aircraft electrical power.

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• 12.

### The unit capable of providing both alternating current (AC) and direct current (DC) electrical power in addition to pneumatic power for ground maintenance is the

• A.

A/M32A-95

• B.

A/M32A-86

• C.

A/M32A-60

• D.

AF/M-32R-3

C. A/M32A-60
Explanation
The A/M32A-60 unit is capable of providing both alternating current (AC) and direct current (DC) electrical power in addition to pneumatic power for ground maintenance.

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• 13.

### The hydraulic systems on the MK-3A-1 hydraulic test stand are designed

• A.

Primary and secondary

• B.

Primary and alternate

• C.

No. 1 and No. 2

• D.

Left and right

C. No. 1 and No. 2
Explanation
The correct answer is "No. 1 and No. 2". This suggests that the hydraulic systems on the MK-3A-1 hydraulic test stand are designed with two separate systems, labeled as No. 1 and No. 2. This design allows for redundancy and backup, ensuring that if one system fails, the other can still function properly.

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• 14.

### The amount of fluid the MJ-2A reservoir holds is

• A.

19 gallons

• B.

27 gallons

• C.

30 gallons

• D.

60 gallons

B. 27 gallons
Explanation
The correct answer is 27 gallons. This is determined by the given information that the amount of fluid the MJ-2A reservoir holds is 27 gallons.

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• 15.

### A class I MB-2 tractor weighs

• A.

2,700 lbs

• B.

40,000 lbs

• C.

53,000 lbs

• D.

500,000 lbs

B. 40,000 lbs
Explanation
The correct answer is 40,000 lbs because it falls within a reasonable weight range for a class I MB-2 tractor. The other options are either too light or too heavy to be considered plausible weights for this type of tractor.

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• 16.

### The structural members, whose chief use is to give shape to the aircraft and provide a means for attaching the skin to the structure, are called

• A.

Longerons

• B.

• C.

Stringers

• D.

Frames

C. Stringers
Explanation
Stringers are structural members in an aircraft that give shape to the aircraft and provide a means for attaching the skin to the structure. They are long, thin, and run longitudinally along the fuselage, wings, or other parts of the aircraft. Stringers help to distribute loads and provide rigidity to the structure, ensuring the overall strength and stability of the aircraft.

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• 17.

### The most common type of material used for fuselage construction is

• A.

Steel

• B.

Titanium

• C.

Magnesium

• D.

Aluminum alloy

D. Aluminum alloy
Explanation
The most common type of material used for fuselage construction is aluminum alloy. Aluminum alloys are preferred due to their high strength-to-weight ratio, corrosion resistance, and ease of fabrication. They provide excellent structural integrity while keeping the weight of the aircraft relatively low. Steel is heavier and less corrosion resistant, titanium is expensive and difficult to work with, and magnesium is prone to corrosion and has lower strength compared to aluminum alloys. Therefore, aluminum alloy is the most suitable material for fuselage construction.

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• 18.

### The wing components that provide strength and contour shape to the wing are the

• A.

Ribs

• B.

Spars

• C.

Stringers

• D.

Stiffeners

A. Ribs
Explanation
Ribs are the wing components that provide strength and contour shape to the wing. They are like the "skeleton" of the wing, running from the leading edge to the trailing edge. Ribs help maintain the shape and structure of the wing, preventing it from collapsing under aerodynamic forces. They also provide attachment points for other components such as the skin and control surfaces. Ribs are typically spaced evenly along the wing, creating a series of internal compartments that help distribute loads and maintain the overall integrity of the wing structure.

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• 19.

### The main difference between inspection plates and panels is

• A.

Size

• B.

Material

• C.

Location

• D.

Installation

A. Size
Explanation
The main difference between inspection plates and panels is their size. Inspection plates are typically smaller in size and are used for accessing small areas or components, while panels are larger and used for accessing larger areas or equipment. Size plays a crucial role in determining the functionality and purpose of these components, as it determines the ease of access and the amount of space available for inspection or maintenance tasks.

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• 20.

### A cracked radome could cause

• A.

Antenna oscillation

• B.

Dielectric increase

• C.

Microwave distortion

• D.

Electron deterioration

C. Microwave distortion
Explanation
A cracked radome, which is the protective cover for an antenna, could cause microwave distortion. The crack in the radome can allow external elements such as moisture or debris to enter, interfering with the transmission and reception of microwave signals. This interference can lead to distortions in the microwave signals, affecting the quality and accuracy of the communication.

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• 21.

### The reference locations, which are in the vertical direction measured from a reference datum that is usually well below the aircraft, are called

• A.

Buttlines

• B.

Waterlines

• C.

Buttock stations

• D.

Fuselage stations

B. Waterlines
Explanation
Waterlines are the reference locations that are measured vertically from a reference datum, which is typically below the aircraft. These reference lines are used to determine the water level and to assess the buoyancy and stability of the aircraft. They help in designing and constructing the aircraft's hull or body, ensuring that it is properly balanced and can float or move through water efficiently. Therefore, waterlines are the correct answer in this context.

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• 22.

### The category of  -21 equipment used for life support and crew comfort is

• A.

I

• B.

II

• C.

III

• D.

IV

C. III
Explanation
The correct answer is III. This category refers to equipment used for life support and crew comfort. This suggests that the equipment in this category is specifically designed and used for the purpose of supporting and ensuring the well-being and comfort of the crew members.

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• 23.

### The effective range of a fully charged handheld fire extinguisher is

• A.

5 feet

• B.

10 feet

• C.

15 feet

• D.

20 feet

D. 20 feet
Explanation
The effective range of a fully charged handheld fire extinguisher is 20 feet. This means that the extinguisher can effectively discharge its contents and reach a fire up to a distance of 20 feet. This range allows the user to maintain a safe distance while extinguishing the fire and ensures that the extinguisher can effectively reach the flames and suppress them.

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• 24.

### The first practical laminated composite formed was

• A.

Safety glass

• B.

Fiberglass

• C.

Plywood

• D.

C. Plywood
Explanation
Plywood was the first practical laminated composite formed because it is made by gluing together multiple layers of thin wood veneers with the grain of each layer running perpendicular to the adjacent layers. This cross-grain construction gives plywood its strength and durability, making it suitable for a wide range of applications in construction and furniture manufacturing. Safety glass and fiberglass are also examples of laminated composites, but plywood predates them in terms of practical use and widespread adoption. Adobe, on the other hand, is not a laminated composite material.

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• 25.

### A barometer is designed to measure pressure in

• A.

Pounds per square inch (psi)

• B.

Inches of mercury

• C.

Relative humidity

• D.

Ounces of air

B. Inches of mercury
Explanation
A barometer is designed to measure pressure, specifically atmospheric pressure. The unit commonly used to measure atmospheric pressure is inches of mercury (inHg). This unit refers to the height of a column of mercury that the atmospheric pressure can support. As the pressure changes, the height of the mercury column also changes, allowing for the measurement of pressure. Therefore, the correct answer is inches of mercury.

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• 26.

### Atmospheric pressure at sea level is

• A.

14.7 psi

• B.

17.4 psi

• C.

29.92 psi

• D.

29.29 psi

A. 14.7 psi
Explanation
The atmospheric pressure at sea level is 14.7 psi. This is the standard value for atmospheric pressure at sea level and is commonly used as a reference point for pressure measurements. Atmospheric pressure is the force exerted by the weight of the air above a certain point and it decreases as altitude increases. At sea level, the weight of the air column above is the highest, resulting in a pressure of 14.7 psi.

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• 27.

### The force that acts parallel to the relative wind is

• A.

Lift

• B.

Drag

• C.

Gravity

• D.

Weight

B. Drag
Explanation
Drag is the force that acts parallel to the relative wind. It is a resistance force that opposes the motion of an object through a fluid, such as air. In the context of aerodynamics, drag is caused by the interaction between the object and the surrounding air molecules. It is influenced by factors such as the shape and size of the object, the speed of the object, and the properties of the fluid. Drag is an important consideration in the design and performance of vehicles and aircraft, as it affects their efficiency and ability to overcome air resistance.

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• 28.

### The axis that extends lengthwise through the fuselage from the nose to the tail is the

• A.

Lateral

• B.

Vertical

• C.

Horizontal

• D.

Longitudinal

D. Longitudinal
Explanation
The correct answer is "longitudinal". The question is asking about the axis that runs from the nose to the tail of the fuselage. The term "longitudinal" refers to lengthwise direction or parallel to the length of an object. Therefore, the axis that extends lengthwise through the fuselage from the nose to the tail is the longitudinal axis.

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• 29.

### The axis that extends crosswise from wing tip to wing tip is the

• A.

Lateral

• B.

Vertical

• C.

Horizontal

• D.

Longitudinal

A. Lateral
Explanation
The correct answer is lateral. The axis that extends crosswise from wing tip to wing tip is known as the lateral axis. This axis is perpendicular to the longitudinal axis, which extends from the nose to the tail of the aircraft. The lateral axis controls the roll motion of the aircraft, allowing it to bank or tilt from side to side.

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• 30.

### Movement about the vertical axis is called

• A.

Roll

• B.

Pitch

• C.

Crab

• D.

Yaw

D. Yaw
Explanation
The correct answer is "yaw". Yaw refers to the movement about the vertical axis. It is the rotation of an object or vehicle around its vertical axis, causing it to turn left or right. This movement is commonly observed in aircraft, boats, and other vehicles where changes in direction are made by rotating along the vertical axis.

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• 31.

### The flight control located on the longitudinal control surface is the

• A.

Rudder

• B.

Aileron

• C.

Elevator

• D.

Wing flaps

C. Elevator
Explanation
The correct answer is elevator. The elevator is a control surface located on the horizontal tail of an aircraft. It is used to control the pitch or the up and down movement of the aircraft. By deflecting the elevator up or down, the pilot can adjust the angle of attack of the aircraft, which affects its pitch attitude and altitude. This control surface is crucial for maintaining the aircraft's stability and controlling its climb and descent.

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• 32.

### The type of flight control system that allows the pilot to control the aircraft if hydraulic pressure is lost is

• A.

Boost

• B.

Manual

• C.

Powered

• D.

Differential pressure

B. Manual
Explanation
The correct answer is "manual." A manual flight control system allows the pilot to directly control the aircraft even if hydraulic pressure is lost. This means that the pilot can still maneuver the aircraft using physical force without relying on hydraulic assistance. This type of system provides a backup option in case of hydraulic failure, ensuring that the pilot can maintain control over the aircraft.

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• 33.

### When making a right turn, the relative position of the ailerons is the right aileron

• A.

Up, left airleron up

• B.

Down, left aileron down

• C.

Up, left aileron down

• D.

Down, left aileron up

C. Up, left aileron down
Explanation
When making a right turn, the relative position of the ailerons is up, left aileron down. This means that the right aileron is raised while the left aileron is lowered. This configuration helps to increase the lift on the right wing, causing the aircraft to roll to the right. By lowering the left aileron, it reduces the lift on that wing and prevents it from rising too much during the turn. This differential movement of the ailerons helps to maintain control and stability during the maneuver.

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• 34.

### The flight control surfaces used to make an aircraft climb or dive are

• A.

Flaps

• B.

Spoilers

• C.

Ailerons

• D.

Elevators

D. Elevators
Explanation
The flight control surfaces used to make an aircraft climb or dive are elevators. Elevators are located on the horizontal stabilizer at the tail of the aircraft and are responsible for controlling the pitch or the up and down motion of the aircraft. By deflecting the elevators, the pilot can change the angle of the aircraft's nose, causing it to climb or descend. Flaps are used to increase lift during takeoff and landing, spoilers are used to decrease lift and increase drag, and ailerons are used to control the roll or the side-to-side motion of the aircraft.

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• 35.

### The type of flap normally incorporated on bomber and cargo type aircraft is

• A.

Split

• B.

Plain

• C.

Fowler

• D.

Slotted

C. Fowler
Explanation
The correct answer is fowler. The fowler flap is commonly used on bomber and cargo type aircraft. It is a type of flap that extends both rearward and downward when deployed, increasing the wing area and improving lift. This design allows for better low-speed performance and increased lift coefficient, making it suitable for larger aircraft that require shorter takeoff and landing distances.

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• 36.

### Aircraft have trim systems to

• A.

Reduce the amount of lift

• B.

Prevent the aircraft from stalling

• C.

Correct minor deviations in flight attitude

• D.

Improve augmented lateral control surface movement

C. Correct minor deviations in flight attitude
Explanation
Aircraft have trim systems to correct minor deviations in flight attitude. These systems help maintain the aircraft's stability and balance by adjusting the control surfaces to counteract any unwanted changes in pitch, roll, or yaw. By making small adjustments to the trim settings, pilots can ensure that the aircraft flies smoothly and maintains the desired flight path without the need for constant manual control inputs. This allows the pilot to focus on other aspects of flying and reduces the workload, making the flight safer and more comfortable.

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• 37.

### The law that states, "the distortion of any elastic body is proportional to the distorting force" is known as

• A.

Hook's law

• B.

Boyle's law

• C.

Pascal's law

• D.

Charles' law

A. Hook's law
Explanation
Hook's law states that the distortion of any elastic body is proportional to the distorting force. This means that when a force is applied to an elastic object, such as stretching a spring, the extension or compression of the object is directly proportional to the force applied. This law is named after the physicist Robert Hooke, who first formulated it in the 17th century.

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• 38.

### When any force causes a solid to change permanently, the solid is said to have

• A.

Passed the elastic limit

• B.

Lost the ability to expand

• C.

Failed to meet elastic limit

• D.

Passed the compression limit

A. Passed the elastic limit
Explanation
When a solid is subjected to a force that causes it to undergo permanent deformation, it is said to have passed the elastic limit. This means that the solid has been stretched or compressed beyond its ability to return to its original shape and size once the force is removed. The elastic limit is the maximum stress or force that a material can withstand without undergoing permanent deformation. Once the elastic limit is surpassed, the solid will not be able to expand or return to its original state, hence losing its ability to expand.

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• 39.

### The most outstanding characteristic of a liquid is its

• A.

Rigidity

• B.

Usability

• C.

Ability to compress within its container

• D.

Ability to conform to the shape of its container

D. Ability to conform to the shape of its container
Explanation
The most outstanding characteristic of a liquid is its ability to conform to the shape of its container. Unlike solids, which have a fixed shape, liquids are able to take on the shape of their container. This is due to the fact that the particles in a liquid are not tightly packed together like in a solid, allowing them to flow and move around. Liquids can fill the space they are in and adjust their shape accordingly. This property is what distinguishes liquids from other states of matter.

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• 40.

### Pascal's law applies to

• A.

A fluid in motion

• B.

Confined fluid at reat

• C.

Fluids flowing through a restriction

• D.

Fluids subjected to high temperatures

B. Confined fluid at reat
Explanation
Pascal's law states that when a fluid is confined and at rest, the pressure applied to the fluid is transmitted equally in all directions. This means that any change in pressure at one point in the fluid will be transmitted to all other points in the fluid. Therefore, the correct answer is "confined fluid at rest" as this is the scenario where Pascal's law applies.

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• 41.

### Among the first to study the compressibility of gases was

• A.

Hook

• B.

Boyle

• C.

Pascal

• D.

Charles

B. Boyle
Explanation
Boyle was among the first to study the compressibility of gases. His experiments led to Boyle's law, which states that the pressure and volume of a gas are inversely proportional at a constant temperature. This means that as the volume of a gas decreases, the pressure increases, and vice versa. Boyle's contributions to the study of gas compressibility laid the foundation for further research in this field.

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• 42.

### The person who found that all gases expand and contract in direct proportion to the change in temperature, provided the pressure remains constant, was

• A.

Hook

• B.

Pascal

• C.

Charles

• D.

Bernoulli

C. Charles
Explanation
The correct answer is Charles. Charles' law states that the volume of a gas is directly proportional to its temperature, as long as the pressure remains constant. This means that as the temperature of a gas increases, its volume will also increase, and vice versa. Charles was the person who discovered this relationship between temperature and volume for gases.

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• 43.

### If 50 psi of cylinder pressure acts on a 5-square-inch piston head, the resulting force will be

• A.

150 pounds

• B.

200 pounds

• C.

250 pounds

• D.

300 pounds

C. 250 pounds
Explanation
The resulting force can be calculated by multiplying the pressure exerted on the piston head by the area of the piston head. In this case, the pressure is 50 psi and the area of the piston head is 5 square inches. Multiplying these values gives us 250 pounds, which is the resulting force.

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• 44.

### When an 8-square-inch piston moves 5 inches within a cylinder, the volume of liquid displaced will be

• A.

4 cubic inches

• B.

40 cubic inches

• C.

400 cubic inches

• D.

4,000 cubic inches

B. 40 cubic inches
Explanation
When an 8-square-inch piston moves 5 inches within a cylinder, the volume of liquid displaced can be calculated by multiplying the area of the piston (8 square inches) by the distance it moves (5 inches). Therefore, the volume of liquid displaced is 8 square inches x 5 inches = 40 cubic inches.

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• 45.

### The principle, which states that as the velocity of a gas or liquid increases, pressure decreases, is

• A.

Hook's

• B.

Boyle's

• C.

Pascal's

• D.

Bernoulli's

D. Bernoulli's
Explanation
Bernoulli's principle states that as the velocity of a gas or liquid increases, the pressure decreases. This principle is based on the conservation of energy, where an increase in velocity corresponds to a decrease in pressure. This principle is widely used in various fields, including aerodynamics, fluid dynamics, and engineering, to explain the behavior of fluids in motion.

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• 46.

### As fluid enters the narrow portion of a venturi,

• A.

It decelerates

• B.

It accelerates

• C.

Nothing happens

• D.

Pressure increases

B. It accelerates
Explanation
As fluid enters the narrow portion of a venturi, it accelerates. This is because the narrowing of the venturi causes the fluid to flow at a higher velocity, according to the principle of continuity. As the fluid accelerates, its velocity increases while the pressure decreases, creating a pressure difference between the narrow and wider portions of the venturi. This principle is utilized in various applications, such as in carburetors to create a pressure difference that helps in atomizing fuel for combustion.

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• 47.

### When referring to hydraulic hand pumps, double-action means

• A.

Fluid-flow is created with each stroke of the pump handle

• B.

Fluid-flow is created with every other stroke of the pump handle

• C.

Double volume is displaced with each stroke of the pump handle

• D.

Double volume is displaced with every other stroke of the pump handle

A. Fluid-flow is created with each stroke of the pump handle
Explanation
In hydraulic hand pumps, double-action means that fluid-flow is created with each stroke of the pump handle. This means that every time the pump handle is moved, fluid is forced through the system, creating a continuous flow. This is different from the other options, where fluid-flow is created either with every other stroke or where double volume is displaced with each stroke.

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• 48.

### Variable-volume pumps do not require a separate pressure-regulating device in the system because

• A.

They deliver low pressure

• B.

They have an integral compensator

• C.

The case drain will relieve high system pressure

• D.

There is no angle between the drive shaft and cylinder block

B. They have an integral compensator
Explanation
Variable-volume pumps do not require a separate pressure-regulating device in the system because they have an integral compensator. An integral compensator is a built-in mechanism in the pump that automatically adjusts the flow rate according to the pressure requirements of the system. This means that the pump can regulate its own pressure without the need for an additional device.

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• 49.

### Cooler operation in a variable-volume hydraulic pump is provided by

• A.

Foot valves

• B.

• C.

Creep plates

• D.

C. Creep plates
Explanation
Creep plates provide cooler operation in a variable-volume hydraulic pump. Creep plates are designed to dissipate heat generated during the operation of the pump. They are placed in the pump's housing and act as heat sinks, absorbing and dispersing the excess heat. This helps in maintaining the temperature of the hydraulic fluid within acceptable limits, preventing overheating and ensuring efficient and reliable pump operation.

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• 50.

### In the Stratopower variable-volume pump, the pistons are held in contact with the cam plate by the

• A.

Fixed pivot

• B.

Nutating plate

• C.

Stationary bearing

• D.

Compensator piston

B. Nutating plate
Explanation
The correct answer is the nutating plate. In the Stratopower variable-volume pump, the nutating plate is responsible for holding the pistons in contact with the cam plate. This plate moves in a circular motion, creating a reciprocating motion in the pistons, which allows for the pumping action of the pump. The nutating plate ensures that the pistons maintain contact with the cam plate, allowing for efficient and effective pumping.

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• Mar 19, 2023
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• May 07, 2011
Quiz Created by
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