CDC 2AX5X - Aerospace Maintenance Journeyman

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Questions: 348 | Attempts: 250

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• 1.

The methods used to cool brushless alternating current (AC) generators are

• A.

Blast air and ram air

• B.

Engine oil and blast air

• C.

Blast air and generator oil

• D.

Generator oil and engine oil

B. Engine oil and blast air
Explanation
The correct answer is engine oil and blast air. Brushless AC generators require cooling to prevent overheating. Engine oil is used to cool the generator's internal components, such as the stator and rotor, which generate heat during operation. This oil circulates within the generator and absorbs the heat, preventing damage to the generator. Additionally, blast air is used to provide external cooling by directing a flow of air over the generator. This helps to dissipate heat from the generator's surface, further preventing overheating. By using a combination of engine oil and blast air, the generator can effectively manage its temperature and operate efficiently.

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• 2.

The output of the constant speed drive (CSD) used to drive a 60/80 kilovolt ampere (KVA) generator is approximately

• A.

4,000 rpm

• B.

6,000 rpm

• C.

8,000 rpm

• D.

10,000 rpm

C. 8,000 rpm
Explanation
The correct answer is 8,000 rpm. This is because a constant speed drive (CSD) is used to drive the generator, and the output of the CSD is approximately 8,000 rpm.

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• 3.

The underspeed switch (USS) on the 60/80 kilovolt ampere (KVA) generator constant speed drive (CSD) actuates at

• A.

325 Hz

• B.

345 Hz

• C.

365 Hz

• D.

395 Hz

C. 365 Hz
Explanation
The underspeed switch (USS) on the 60/80 KVA generator constant speed drive (CSD) actuates at 365 Hz. This means that when the frequency of the generator drops below 365 Hz, the underspeed switch will be triggered and activate a safety mechanism. This is important because it helps to prevent the generator from operating at dangerously low speeds, which could lead to damage or failure. By setting the actuation point at 365 Hz, the generator can maintain a stable and consistent speed within the desired range.

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• 4.

What supplies rotary power to the input gear of the constant speed drive (CSD)?

• A.

Accessory gearbox

• B.

Transmission shaft

• C.

Torque converter

• D.

Hydraulic gear

A. Accessory gearbox
Explanation
The accessory gearbox supplies rotary power to the input gear of the constant speed drive (CSD). It is responsible for transferring power from the engine to various accessories and components in the aircraft. The accessory gearbox is typically connected to the engine and houses various gears and shafts that transmit power to different systems, including the CSD. This allows the CSD to receive the necessary power to operate efficiently and maintain a constant speed.

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• 5.

A battery's internal component that is a grid or framework which supports the active chemical materials is called the

• A.

Plate

• B.

Separator

• C.

Electrolyte

• D.

Chemical solution

A. Plate
Explanation
A battery's internal component that is a grid or framework which supports the active chemical materials is called a plate. The plate provides a surface for the chemical reactions to occur, allowing the battery to generate and store electrical energy.

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• 6.

• A.

12 cells

• B.

19 cells

• C.

20 cells

• D.

24 cells

B. 19 cells
Explanation
A 24-volt nickel-cadmium battery typically has 19 cells. Each cell in a nickel-cadmium battery provides around 1.2 volts, so when 19 cells are connected in series, the total voltage adds up to 24 volts. This configuration is commonly used in nickel-cadmium batteries to achieve the desired voltage output.

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• 7.

The nickel-cadmium battery can be fully charged only by

• A.

Pulsating current

• B.

Constant current

• C.

Varying current

• D.

Eddy current

B. Constant current
Explanation
The correct answer is constant current because nickel-cadmium batteries have a specific charging characteristic that requires a steady and controlled flow of current. Constant current charging ensures that the battery is charged at a consistent rate, preventing overcharging or undercharging. This method allows the battery to reach its maximum capacity without damaging its internal components or reducing its overall lifespan.

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• 8.

What type of motor can operate on alternating current (AC) or direct current (DC)?

• A.

Shunt

• B.

Circuit

• C.

Universal

• D.

Compound

C. Universal
Explanation
A universal motor is capable of operating on both alternating current (AC) and direct current (DC). This type of motor is designed with a field winding and an armature winding that are connected in series or parallel, allowing it to work with both types of current. The versatility of a universal motor makes it suitable for a wide range of applications where the power source may vary between AC and DC.

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• 9.

A shunt-type motor has

• A.

Less speed regulation than a universal motor

• B.

A field winding in a series with the armature

• C.

Low starting torque and good speed regulation

• D.

High starting torque and poor speed regulation

C. Low starting torque and good speed regulation
Explanation
A shunt-type motor has low starting torque and good speed regulation. This means that the motor does not have a strong initial force to start rotating but once it is running, it can maintain a consistent speed even under varying load conditions. The field winding in a shunt-type motor is connected in parallel (shunt) with the armature, allowing for independent control of the field current. This design characteristic contributes to the motor's ability to regulate its speed effectively.

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• 10.

The three states of matter are

• A.

Liquids, gasses, and minerals

• B.

Gasses, solids, and minerals

• C.

Gasses, solids, and organics

• D.

Liquids, gasses, and solids

D. Liquids, gasses, and solids
Explanation
The three states of matter are liquids, gases, and solids. These states are based on the arrangement and movement of particles. In a liquid, the particles are close together but can move around and slide past each other. In a gas, the particles are spread out and move freely. In a solid, the particles are tightly packed and vibrate in place. This classification helps to understand and describe the physical properties and behavior of different substances.

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• 11.

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 the elastic limit

• D.

Passed the compression limit

A. Passed the elastic limit
Explanation
When any force causes a solid to change permanently, it means that the solid has passed the elastic limit. The elastic limit is the maximum stress or force that a material can withstand without undergoing permanent deformation. Once the solid has passed this limit, it will not return to its original shape or size when the force is removed. Therefore, the correct answer is "passed the elastic limit."

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• 12.

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 correct answer is "ability to conform to the shape of its container". This is because liquids do not have a fixed shape and can take the shape of the container they are poured into. Unlike solids, liquids do not have a rigid structure and can flow and change shape easily. This property allows liquids to adapt to the shape of their containers and fill them completely.

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• 13.

What usually produces flow in a pneudraulic system?

• A.

Relief valves in the lines

• B.

Piston pushing the fluid

• C.

Scupper pushing the fluid

• D.

Selector valve in the lines

B. Piston pushing the fluid
Explanation
In a pneudraulic system, flow is usually produced by a piston pushing the fluid. The piston acts as a mechanical force to move the fluid through the system, creating the flow. This is a common method used in pneudraulic systems to generate the necessary movement and pressure for various applications.

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• 14.

If 50 psi of cylinder pressure acts on a 5 sq-in piston head, what will the resulting force be?

• A.

150 lbs

• B.

200 lbs

• C.

250 lbs

• D.

300 lbs

C. 250 lbs
Explanation
F=P*A
F=50*5
F=250

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• 15.

When an 8 sq-in piston moves 5 inches within a cylinder, what volume of liquid is displaced? (cu-in = cubic inches = in^3)

• A.

4 cu-in

• B.

40 cu-in

• C.

400 cu-in

• D.

4,000 cu-in

B. 40 cu-in
Explanation
V=L*A
V=8*5
V=40

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• 16.

Turbulence affects fluid-flow in a hydraulic line by

• A.

Increasing velocity and viscosity

• B.

Increasing volume and displacement

• C.

Creating resistance and loss of energy

• D.

Creating resistance and energy increase

C. Creating resistance and loss of energy
Explanation
Turbulence in a hydraulic line disrupts the smooth flow of fluid, causing resistance and loss of energy. When turbulence occurs, the fluid particles move in irregular patterns, generating eddies and vortices. This chaotic motion creates resistance, making it harder for the fluid to flow through the line. Additionally, the energy of the fluid is dissipated as it interacts with the turbulent flow, resulting in a loss of energy. Therefore, turbulence in a hydraulic line creates resistance and causes a decrease in energy efficiency.

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• 17.

A tube whose cross-section area is gradually reduced to a smaller size diameter is called a

• A.

Torus

• B.

Pipette

• C.

Vortex

• D.

Venturi

D. Venturi
Explanation
A tube whose cross-section area is gradually reduced to a smaller size diameter is called a venturi. A venturi tube is used to measure the flow rate of a fluid or to create a pressure difference in a fluid. The gradual reduction in diameter causes an increase in the fluid's velocity, resulting in a decrease in pressure according to Bernoulli's principle. This principle is utilized in various applications such as in carburetors, where a venturi tube is used to mix air and fuel for combustion in an internal combustion engine.

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• 18.

The purposes of a hydraulic reservoir is to

• A.

Store fluid and act as a surge chamber

• B.

Restrict fluid flow in selected directions

• C.

Pressurize and direct fluid to an actuator

• D.

Replenish fluid, allow for thermal expansion, and provide a means of bleeding air from the system

D. Replenish fluid, allow for thermal expansion, and provide a means of bleeding air from the system
Explanation
The hydraulic reservoir serves multiple purposes. It replenishes fluid, ensuring that an adequate supply is available for the system to function properly. It also allows for thermal expansion, which is important as hydraulic systems can generate heat during operation. Additionally, the reservoir provides a means of bleeding air from the system, preventing air pockets that could disrupt the hydraulic fluid flow.

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• 19.

The purpose of a standpipe in a reservoir is to

• A.

Protect the pump

• B.

Reserve fluid for the power pump

• C.

Reserve fluid for the emergency pump

• D.

Supply the pump during inverted flight

C. Reserve fluid for the emergency pump
Explanation
A standpipe in a reservoir is designed to reserve fluid specifically for the emergency pump. In case of any unexpected failure or malfunction of the primary pump, the emergency pump can rely on the fluid stored in the standpipe to continue operating and ensure the necessary fluid supply. This helps to maintain the functionality and reliability of the emergency pump, which is crucial in situations where immediate action is required to prevent any potential damage or harm.

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• 20.

The amount of fluid a pump produces on each cycle or revolution is called its

• A.

Displacement

• B.

Purgement

• C.

Volume

• D.

Rating

A. Displacement
Explanation
The correct answer is displacement. Displacement refers to the amount of fluid that a pump can produce on each cycle or revolution. It is a measure of the pump's capacity to move fluid and is usually expressed in units of volume per revolution. Purgement, volume, and rating are not specific terms used to describe the amount of fluid a pump produces.

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• 21.

When referring to hydraulic hand pumps, double action means

• A.

Fluid-flow is created with each stroke of the handle

• B.

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

• C.

Double volume is displaced with each stroke of the handle

• D.

Double volume is displaced with every other stroke of the handle

A. Fluid-flow is created with each stroke of the handle
Explanation
Double action in hydraulic hand pumps means that fluid-flow is created with each stroke of the handle. This means that both the upward and downward movement of the handle results in the creation of fluid-flow. As a result, the pump is able to generate continuous fluid-flow, providing a more efficient and effective pumping action.

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• 22.

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 relieves high system pressure

• D.

There is no angle between the drift 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. This means that the pump is able to automatically adjust its output pressure based on the system's demand. The integral compensator senses the pressure in the system and adjusts the pump's displacement accordingly, ensuring that the pressure remains within the desired range without the need for an external pressure-regulating device.

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• 23.

What provides for cooler operation in a Stratopower variable-volume hydraulic pump?

• A.

Foot valves

• B.

• C.

Creep plates

• D.

C. Creep plates
Explanation
Creep plates provide for cooler operation in a Stratopower variable-volume hydraulic pump. Creep plates are designed to dissipate heat generated during the operation of the pump. They help in cooling the hydraulic fluid by providing a larger surface area for heat transfer. This prevents the pump from overheating and ensures efficient and cooler operation.

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• 24.

The purpose of a hydraulic motor is to convert hydraulic pressure into

• A.

Rotary mechanical motion

• B.

Kinetic flow motion

• C.

Straight-line motion

• D.

Fluid locomotion

A. Rotary mechanical motion
Explanation
A hydraulic motor is designed to convert hydraulic pressure into rotary mechanical motion. This means that when hydraulic fluid is supplied to the motor, it uses the pressure of the fluid to generate rotational movement. This type of motion is commonly used in various applications, such as powering machinery and equipment that require continuous rotary motion. The other options, kinetic flow motion, straight-line motion, and fluid locomotion, do not accurately describe the purpose of a hydraulic motor.

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• 25.

How is the piston installed in an accumulator?

• A.

In either direction

• B.

Hollow end toward the air side of the accumulator

• C.

Hollow end toward the fluid side of the accumulator

• D.

Drilled passage toward the air side of the accumulator

B. Hollow end toward the air side of the accumulator
Explanation
The piston is installed in an accumulator with the hollow end facing towards the air side of the accumulator. This is because the air side of the accumulator is pressurized, and the hollow end allows the piston to move freely and accommodate the pressure changes. Placing the hollow end towards the fluid side would not allow proper movement of the piston and could disrupt the functioning of the accumulator.

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• 26.

The size of one micron is four

• A.

Tenths of an inch

• B.

Thousandths of an inch

• C.

Millionths of an inch

• D.

Billionths of an inch

C. Millionths of an inch
Explanation
One micron is equivalent to one millionth of an inch. This means that if you were to divide an inch into one million equal parts, each part would be one micron in size. Therefore, the correct answer is "millionths of an inch".

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• 27.

In a hydraulic system, the hydraulic manifold provides a location where the

• A.

Return lines can join together

• B.

Pressure lines can join together

• C.

Common fluids can come together

• D.

Hydraulic test stand can be connected

C. Common fluids can come together
Explanation
The hydraulic manifold provides a location where common fluids can come together. This means that different fluid sources or circuits can be connected to the manifold, allowing the fluids to mix or be distributed as needed. This is essential for ensuring that the hydraulic system functions properly and that the fluids can be efficiently utilized.

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• 28.

The purpose of an actuating cylinder is to transform fluid pressure into

• A.

Angular motion

• B.

A mechanical force

• C.

A constant velocity

• D.

An electromotive force

B. A mechanical force
Explanation
An actuating cylinder is a device that converts fluid pressure into a mechanical force. This means that when fluid pressure is applied to the cylinder, it generates a force that can be used to move or actuate other mechanical components. The cylinder essentially transforms the energy from the fluid into a force that can be used to perform work or create motion in a system.

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• 29.

What pneudraulic system component uses a single-acting actuating cylinder?

• A.

Rudder

• B.

Cargo door

• C.

Brake assembly

• D.

Nosewheel steering

C. Brake assembly
Explanation
A pneudraulic system is a combination of pneumatic and hydraulic systems. It uses compressed air and hydraulic fluid to generate power and control various components. A single-acting actuating cylinder is a type of cylinder that can only generate force in one direction, either extending or retracting. In the context of the given options, the brake assembly is the component that uses a single-acting actuating cylinder. This makes sense because when the brakes are applied, the cylinder extends and applies pressure to the brake pads or shoes, causing them to engage with the brake rotor or drum and slow down or stop the vehicle.

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• 30.

What pneudraulic system component uses a double-acting balanced actuating cylinder?

• A.

Speed brake

• B.

Brake assembly

• C.

Cargo door system

• D.

Nosewheel steering

D. Nosewheel steering
Explanation
A pneudraulic system component that uses a double-acting balanced actuating cylinder is the nosewheel steering. This system allows for the controlled movement and steering of the nosewheel of an aircraft. The double-acting cylinder ensures that the steering mechanism can move in both directions, providing balanced and precise steering control.

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• 31.

Which actuator type slows down piston travel when the piston nears either end of the cylinder?

• A.

Tandem

• B.

Internal locking

• C.

Internal snubber

• D.

Double-acting balanced

C. Internal snubber
Explanation
An internal snubber is an actuator type that slows down piston travel when the piston nears either end of the cylinder. It is designed to provide cushioning and dampening effect to prevent abrupt stops or impacts at the end positions of the piston. This helps to protect the actuator and the system from potential damage caused by high forces or sudden stops.

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• 32.

A manual poppet-type selector valve is in a working position when the camshaft is rotated to

• A.

Seat all four of the poppets

• B.

Unseat all four of the poppets

• C.

Seat both of the pressure poppets

• D.

Unseat one pressure poppet and one return poppet

D. Unseat one pressure poppet and one return poppet
Explanation
When the camshaft is rotated, it unseats one pressure poppet and one return poppet in a manual poppet-type selector valve. This means that these two poppets are lifted or opened, allowing fluid to flow through the valve. The other options, such as seating all four poppets or unseating all four poppets, do not accurately describe the working position of the valve when the camshaft is rotated.

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• 33.

The major advantage of the manual slide-type hydraulic selector valve is it's

• A.

Dampening ability

• B.

Metering ability

• C.

Ability to contain system pressure

• D.

Ability to relieve excess system pressure

B. Metering ability
Explanation
The manual slide-type hydraulic selector valve has the advantage of metering ability. This means that it can control and regulate the flow of hydraulic fluid through the system. By adjusting the position of the slide, the valve can control the speed and volume of fluid flowing through it. This metering ability is crucial in applications where precise control of hydraulic flow is required, such as in hydraulic cylinders or motors.

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• 34.

Normally, what positions the hydraulic selector valves?

• A.

Bus

• B.

Servos

• C.

Relay

• D.

Solenoid

D. Solenoid
Explanation
The solenoid is responsible for positioning the hydraulic selector valves. A solenoid is an electromechanical device that converts electrical energy into linear motion. In this case, it controls the flow of hydraulic fluid by opening and closing the selector valves. By energizing the solenoid, the valves can be positioned to direct the hydraulic fluid to the desired location or component in the system.

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• 35.

The advantage of an electrically controlled solenoid valve is its

• A.

Reduced weight

• B.

Increased weight

• C.

Ability to reduce turbulance

• D.

Ability to increase turbulance

A. Reduced weight
Explanation
An electrically controlled solenoid valve has the advantage of reduced weight compared to other types of valves. This is because it does not require additional mechanical components such as levers or actuators to control the valve's operation. Instead, the solenoid valve uses an electromagnetic coil to open and close the valve, resulting in a more compact and lightweight design.

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• 36.

The difference between a selector valve and a servo valve is that the

• A.

Selector valve has four parts

• B.

Selector valve is more complex

• C.

Servo valve controls fluid-flow

• D.

Servo valve is electrically operated

C. Servo valve controls fluid-flow
Explanation
The correct answer is servo valve controls fluid-flow. A servo valve is a type of valve that is used to control the flow of fluid in a system. It is typically used in hydraulic systems and is operated by an electrical signal. On the other hand, a selector valve is a type of valve that is used to select between different fluid flow paths. While a selector valve may have four parts and be more complex, the key difference between the two is that a servo valve specifically controls the flow of fluid.

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• 37.

Another name for a flapper check valve is

• A.

Ball check valve

• B.

Gate check valve

• C.

Cone check valve

• D.

Restrictor check valve

B. Gate check valve
Explanation
A flapper check valve is commonly known as a gate check valve. This type of valve uses a hinged flap or gate to allow fluid flow in one direction while preventing backflow. When the fluid flows in the correct direction, the gate opens, allowing the fluid to pass through. However, when there is a reverse flow, the gate closes, preventing the fluid from flowing backward. Therefore, the term "gate check valve" accurately describes the function and design of a flapper check valve.

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• 38.

What is the purpose of the arrow on the check valve?

• A.

Show filter position within the system

• B.

Indicate left and right hand threading

• C.

Show the direction of free flow through the valve

• D.

Indicate installation points in relation to the pump

C. Show the direction of free flow through the valve
Explanation
The purpose of the arrow on the check valve is to show the direction of free flow through the valve. This arrow indicates the path that the fluid or gas should follow when flowing through the valve, ensuring that it operates correctly. It helps users to correctly install the valve in the system and ensure that the flow is in the desired direction.

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• 39.

Which of these allows normal operating speed of a hydraulic actuator in one direction while limiting the speed in the other direction?

• A.

Automatic check valve

• B.

Restrictor check valve

• C.

Bypass valve

• D.

Relief valve

B. Restrictor check valve
Explanation
A restrictor check valve allows the normal operating speed of a hydraulic actuator in one direction while limiting the speed in the other direction. This valve contains a restriction orifice that controls the flow of fluid, allowing it to pass freely in one direction but restricting it in the opposite direction. This feature ensures that the actuator can move quickly and efficiently in one direction while preventing rapid or uncontrolled movement in the other direction.

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• 40.

What are the basic units of a hydraulic hand pump system?

• A.

Pump, actuator, filter, and priority valve

• B.

Pump, actuator, shutoff, and metering valve

• C.

Reservoir, pump, actuator, and metering valve

• D.

Reservoir, pump, actuator, and manual shutoff valve

D. Reservoir, pump, actuator, and manual shutoff valve
Explanation
The basic units of a hydraulic hand pump system are the reservoir, pump, actuator, and manual shutoff valve. The reservoir holds the hydraulic fluid, the pump pressurizes the fluid, the actuator converts the fluid pressure into mechanical force, and the manual shutoff valve controls the flow of fluid. These components work together to create a hydraulic system that can generate force and power various mechanical devices.

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• 41.

The reservoir supplies hydraulic fluid to a hand pump

• A.

By gravity

• B.

By the suction effect of the pump

• C.

By gravity and the suction effect of the pump

• D.

In response to pressure demand and the suction effect of the pump

C. By gravity and the suction effect of the pump
Explanation
The explanation for the correct answer is that the reservoir supplies hydraulic fluid to a hand pump both by gravity and the suction effect of the pump. Gravity helps in providing a constant flow of fluid from the reservoir to the pump, while the suction effect of the pump helps in drawing the fluid from the reservoir into the pump. This combination of gravity and suction ensures a steady supply of hydraulic fluid to the hand pump.

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• 42.

When pressure in a hydraulic system with a variable-volume pump increases, the fluid-flow

• A.

Stops

• B.

Increases

• C.

Decreases

• D.

Remains the same

C. Decreases
Explanation
When the pressure in a hydraulic system with a variable-volume pump increases, the fluid-flow decreases. This is because the variable-volume pump adjusts its displacement to maintain a constant pressure. As the pressure increases, the pump reduces its displacement, resulting in a decrease in fluid flow. This helps to regulate the pressure within the system and prevent any potential damage or failure due to excessive pressure.

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• 43.

The estimated percent of accidents caused by nature is

• A.

2

• B.

4

• C.

6

• D.

8

A. 2
Explanation
The estimated percent of accidents caused by nature is 2. This means that only a small percentage of accidents can be attributed to natural causes, such as weather conditions or natural disasters. The majority of accidents are likely caused by human factors, such as negligence, reckless driving, or mechanical failures. It is important to take into account these natural causes when analyzing accident data and implementing safety measures to prevent them.

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• 44.

What is the percentage of accidents attributable to unsafe acts and physical hazards?

• A.

50

• B.

70

• C.

90

• D.

98

D. 98
Explanation
The correct answer is 98. This suggests that a high percentage of accidents can be attributed to both unsafe acts and physical hazards. It implies that a majority of accidents occur due to human error or negligence, as well as the presence of hazardous conditions or objects. This highlights the importance of promoting safety measures and practices to prevent accidents and minimize risks in various settings.

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• 45.

Which directives are used when performing maintenance procedures?

• A.

Manuals, CDCs, and handbooks

• B.

TOs, manuals, and CDCs

• C.

Manuals, TOs, and handbooks

• D.

TOs, handbooks, and CDCs

C. Manuals, TOs, and handbooks
Explanation
When performing maintenance procedures, the directives that are typically used are Manuals, TOs (Technical Orders), and handbooks. These documents provide step-by-step instructions, guidelines, and reference materials for carrying out maintenance tasks effectively and safely. CDCs (Career Development Courses) are not typically used for maintenance procedures and are more focused on training and career development. Therefore, the correct answer is Manuals, TOs, and handbooks.

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• 46.

What safety training phase is described as an effective tool that creates a lasting impression?

• A.

Initial

• B.

General

• C.

Supervisor's

• D.

Sustained job safety

A. Initial
Explanation
The initial safety training phase is described as an effective tool that creates a lasting impression. This phase is typically the first training that employees receive when they join an organization. It is designed to provide them with the basic knowledge and skills necessary to perform their job safely. By focusing on this initial phase, organizations can ensure that employees have a strong foundation of safety knowledge and practices, which can help to prevent accidents and injuries in the workplace.

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• 47.

A chemical must be identified as a carcinogen in the MSDSs if concentrations are greater than

• A.

-2.0%

• B.

-1.0%

• C.

0.1%

• D.

1.0%

C. 0.1%
Explanation
A chemical must be identified as a carcinogen in the MSDSs if concentrations are greater than 0.1%. This means that if the concentration of the chemical in a product or substance is equal to or higher than 0.1%, it must be labeled as a carcinogen. This is important for safety purposes as it informs individuals about the potential cancer-causing properties of the chemical and allows them to take necessary precautions when handling or being exposed to it.

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• 48.

• A.

The USAF

• B.

Each MAJCOM

• C.

DOD

• D.

EPA

D. EPA
Explanation
The correct answer is EPA. EPA stands for the Environmental Protection Agency, which is responsible for regulating and managing hazardous waste in the United States. They establish rules and guidelines for the proper handling, storage, transportation, and disposal of hazardous waste to protect human health and the environment. The EPA works closely with other government agencies, such as the Department of Defense (DOD), to ensure compliance with hazardous waste management regulations.

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• 49.

Temporary storage of hazardous materials at a central accumulation point cannot exceed

• A.

30

• B.

60

• C.

90

• D.

120

C. 90
Explanation
According to the given information, temporary storage of hazardous materials at a central accumulation point cannot exceed a certain limit. The correct answer is 90, which means that the maximum allowable time for storing hazardous materials at the central accumulation point is 90 units (hours, days, etc.).

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• 50.

• A.

Strength of emission, time of day, and input power

• B.

Strength of emission, time of exposure, and weather

• C.

Input power, weather, and number of personnel in area

• D.

Time of exposure, amount of training, and number of operating units

B. Strength of emission, time of exposure, and weather
Explanation
The factors that affect radiation hazards are the strength of emission, time of exposure, and weather. The strength of emission refers to the intensity of the radiation source, which can determine the level of hazard. The time of exposure refers to the duration of time that a person is exposed to the radiation, as prolonged exposure can increase the risk of harm. Weather conditions can also play a role in radiation hazards, as certain weather conditions can affect the dispersion and concentration of radiation in the environment.

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• Current Version
• Mar 20, 2023
Quiz Edited by
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• Mar 11, 2014
Quiz Created by
Kevinfalting