AMOC Block 4 Test

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Quizzes Created: 8 | Total Attempts: 541
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  • 1/97 Questions

    (401a) How do you measure current?

    • Amps
    • Ohms
    • Volts
    • Hertz
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About This Quiz

The AMOC Block 4 Test assesses knowledge on aircraft electrical systems, focusing on measuring current, conductivity, and the function of components such as relays and generators. It's designed for professionals enhancing their understanding of typical and emergency power systems in aircraft.

AMOC Block 4 Test - Quiz

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  • 2. 

    (401a) Which of the following is not a good conductor?

    • Silver

    • Gold

    • Copper

    • Boron

    Correct Answer
    A. Boron
    Explanation
    Boron is not a good conductor because it is a metalloid and has properties of both metals and nonmetals. While metals like silver, gold, and copper have a high electrical conductivity due to the presence of free electrons that can easily move and carry electric charge, boron does not have these free electrons and therefore does not conduct electricity well.

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  • 3. 

    (402a) What is used used to identify and track targets on the ground?

    • Reconnaissance and Surveillance

    • Search and Rescue

    • Ground Mapping

    • Weapons Implementation

    Correct Answer
    A. Ground Mapping
    Explanation
    Ground mapping is used to identify and track targets on the ground. This technique involves the use of various sensors and imaging systems to create detailed maps and images of the Earth's surface. By analyzing these maps and images, targets on the ground can be identified and tracked for various purposes such as military operations, disaster response, and urban planning. Ground mapping is an essential tool in reconnaissance and surveillance activities, providing valuable information about enemy positions, terrain features, and potential threats on the ground.

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  • 4. 

    (402b) Very High Frequency transmits at? (Used for short-range, Line-of-Sight (LOS))

    • 20-200 MHz

    • 30-300 MHz

    • 40-400 MHz

    • 50-500 MHz

    Correct Answer
    A. 30-300 MHz
    Explanation
    Very High Frequency (VHF) transmits at a range of 30-300 MHz. VHF is used for short-range communication and requires a clear line of sight between the transmitter and receiver. This frequency range is commonly used for various applications such as FM radio broadcasting, television broadcasting, air traffic control, and military communications.

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  • 5. 

    (402g) What is the Offensive Avionics System (OAS) 

    • Reduces structural overload, fatigue damage, and improves aircraft controllability during turbulent

    • Controls the flight of the aircraft independently or in conjunction with other Nav equipment

    • Navigates aircraft and provides weapon storage and release capabilities for missiles and gravity weapons

    • Provide continuous, reliable, source of magnetic heading and attitude information

    Correct Answer
    A. Navigates aircraft and provides weapon storage and release capabilities for missiles and gravity weapons
  • 6. 

    (402g) What prevents aircraft from exceeding its physical limits 

    • G-limits

    • Roll Protection

    • Physical Lift Barrier

    • Automatic ILS

    Correct Answer
    A. G-limits
    Explanation
    G-limits prevent aircraft from exceeding its physical limits. G-limits refer to the maximum load factor that an aircraft can sustain without causing structural damage. These limits are determined based on the aircraft's design and are crucial for ensuring the safety and integrity of the aircraft during flight. By adhering to G-limits, pilots can avoid overstressing the aircraft and maintain control within its physical limitations.

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  • 7. 

    (403c) Which of the following are benefits of LOX system?

    • Occupies a lot of space and its low weight

    • Save space and weight

    • It has a quantity indicator

    • It’s boiling point it -297 degrees Fahrenheit

    Correct Answer
    A. Save space and weight
    Explanation
    The LOX system offers the benefit of saving space and weight. This means that it takes up less physical space and is lighter in weight compared to other systems. This is advantageous in various applications where space and weight constraints are crucial, such as in aircraft or spacecraft. Additionally, the LOX system's boiling point of -297 degrees Fahrenheit allows it to be stored and used in extremely cold temperatures, further enhancing its usability.

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  • 8. 

    (402c) Which landing systems includes the following signals: tone localizer, glide slope, and a marker beacon? 

    • Instrument Landing System

    • Microwave Landing System

    • Global Position System

    • Pilot Landing System

    Correct Answer
    A. Instrument Landing System
    Explanation
    The correct answer is Instrument Landing System. The Instrument Landing System (ILS) includes the signals of a tone localizer, glide slope, and a marker beacon. These signals help guide the aircraft during the landing approach, providing precise vertical and horizontal guidance to the pilot. The tone localizer helps the pilot align the aircraft with the centerline of the runway, the glide slope provides vertical guidance for maintaining the correct descent angle, and the marker beacon provides additional distance information to the pilot. The ILS is a widely used landing system in aviation.

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  • 9. 

    (402c) How many satellites does the military use for navigation accuracy? 

    • 1

    • 2

    • 3

    • 4

    Correct Answer
    A. 4
    Explanation
    The military uses four satellites for navigation accuracy. This suggests that having four satellites allows for more precise and accurate navigation capabilities, as each satellite can provide different data points to triangulate and determine the user's exact location. Having multiple satellites also helps to ensure continuous coverage and availability of navigation services, even in areas with limited satellite visibility.

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  • 10. 

    (402b) What maintains proper distance between A/C and allows for tight formation flying? 

    • Station Keeping Equipment

    • Navigation System

    • Interphone Systems

    • Transmitting Homing Signal

    Correct Answer
    A. Station Keeping Equipment
    Explanation
    Station Keeping Equipment is the correct answer because it is responsible for maintaining the proper distance between aircraft and allows for tight formation flying. This equipment includes various systems such as radar, GPS, and autopilot, which help pilots to maintain a specific distance and formation during flight. It ensures that aircraft stay in close proximity to each other while maintaining a safe distance to prevent collisions and ensure smooth and coordinated flying.

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  • 11. 

    (403b) What does the vacuum relief valve (VrV) do?

    • Prevents over pressure

    • Prevents excessive cabin pressure

    • Prevents excessive negative pressure

    • Transfers emergency air to backup air in the event of a primary power loss

    Correct Answer
    A. Prevents excessive negative pressure
    Explanation
    The vacuum relief valve (VrV) is designed to prevent excessive negative pressure. Negative pressure refers to a situation where the pressure inside a system is lower than the surrounding pressure. In the context of a vacuum relief valve, this means that the valve is responsible for maintaining a balanced pressure inside a system, preventing it from becoming too low. This is important because excessive negative pressure can lead to damage or malfunction of the system. Therefore, the vacuum relief valve ensures that the pressure remains within a safe range.

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  • 12. 

    (402g) What is the autopilot system 

    • Reduces structural overload, fatigue damage, and improves aircraft controllability during turbulent

    • Controls the flight of the aircraft independently or in conjunction with other Nav equipment

    • Navigates aircraft and provides weapon storage and release capabilities for missiles and gravity weapons

    • Provide continuous, reliable, source of magnetic heading and attitude information

    Correct Answer
    A. Controls the flight of the aircraft independently or in conjunction with other Nav equipment
    Explanation
    The autopilot system controls the flight of the aircraft independently or in conjunction with other navigation equipment. This means that it can take over the control of the aircraft and maintain its stability and direction without the need for constant manual input from the pilot. It can also work together with other navigation equipment to ensure accurate and efficient navigation.

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  • 13. 

    (402g) What is the Terrain Avoidance/Terrain Following Radars? 

    • Provides continuous, reliable, source of magnetic heading and attitude information

    • Internal gyroscope provides information based on aircrafts attitude and present position

    • Provides altitude and airspeed info

    • Used for low-level missions

    Correct Answer
    A. Used for low-level missions
    Explanation
    The Terrain Avoidance/Terrain Following Radars are used for low-level missions. This means that they are specifically designed and utilized for flying at low altitudes, where there is a higher risk of encountering obstacles such as terrain or buildings. These radars provide crucial information about the aircraft's surroundings, allowing pilots to navigate safely and avoid potential hazards.

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  • 14. 

    (402g) What is Inertial Nav System (INS)? 

    • Provides continuous, reliable, source of magnetic heading and attitude information

    • Internal gyroscope provides information based on aircrafts attitude and present position

    • Provides altitude and airspeed info

    • Used for low-level missions

    Correct Answer
    A. Internal gyroscope provides information based on aircrafts attitude and present position
    Explanation
    The correct answer is "Internal gyroscope provides information based on aircraft's attitude and present position." The Inertial Nav System (INS) uses an internal gyroscope to measure the aircraft's attitude (orientation) and present position. This information is then used to provide continuous and reliable heading and attitude information. The INS also provides altitude and airspeed information, making it useful for low-level missions where accurate navigation is crucial.

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  • 15. 

    (402e) What optical sensor system takes high-altitude photo negatives during daylight?

    • Monographic camera system

    • Optical bar camera

    • Spectrographic steerable camera system (SSCS)

    • U-2 reconnaissance unit

    Correct Answer
    A. Optical bar camera
    Explanation
    The optical bar camera is an optical sensor system that takes high-altitude photo negatives during daylight. It is specifically designed for aerial reconnaissance purposes and is capable of capturing detailed images from high altitudes. The monographic camera system, spectrographic steerable camera system (SSCS), and U-2 reconnaissance unit are not mentioned as being capable of taking high-altitude photo negatives during daylight, making the optical bar camera the correct answer.

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  • 16. 

    (403c) What is designed to blow out and prevent explosion if inner shell develops a leak?

    • Rupture Disk

    • Pressure Closing Valve

    • Build up Coils

    • Heat exchanger

    Correct Answer
    A. Rupture Disk
    Explanation
    A rupture disk is designed to blow out and prevent an explosion if the inner shell of a system develops a leak. It acts as a safety device by relieving excessive pressure and preventing the potential build-up of explosive gases or substances. When the pressure inside the system exceeds a predetermined level, the rupture disk bursts, allowing the pressure to escape and preventing a catastrophic explosion. This mechanism ensures the safety of the system and its surroundings.

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  • 17. 

    (401a) What converts 28 VDC into 115VAC 1 or 2 phase emergency power?

    • Transformer Rectifier

    • Inverter

    • Emergency Generator

    • Integrated Drive Generator (IDG)

    Correct Answer
    A. Inverter
    Explanation
    An inverter is a device that converts direct current (DC) into alternating current (AC). In this case, it is used to convert the 28 VDC emergency power into 115VAC 1 or 2 phase power. The inverter takes the DC power from a battery or other DC source and changes it into AC power, which is suitable for powering electrical devices. This is commonly used in emergency situations where a reliable and stable source of AC power is needed.

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  • 18. 

    (402a) The four factors that affect Radar reflection are:

    • Size, Material, Radar Range, Reflection angle

    • Size, Material, Radar Power, Reflection angle

    • Size, Material, Radar Range, Refraction angle

    • Size, Material, Radar Range, Reflection arc

    Correct Answer
    A. Size, Material, Radar Range, Reflection angle
    Explanation
    The correct answer is Size, Material, Radar Range, Reflection angle. These four factors affect Radar reflection. Size refers to the physical dimensions of the object being detected by the radar. Material refers to the composition of the object, as different materials have different reflective properties. Radar Range refers to the distance between the radar transmitter and the object, which can affect the strength of the reflected signal. Reflection angle refers to the angle at which the radar signal hits the object and is reflected back to the radar, which can also affect the strength and accuracy of the reflection.

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  • 19. 

    (402d) What are three types of noise jamming radar?

    • Spot, swept spot, total

    • Total, spot, focused

    • Barrage, spot, swept spot

    • Barrage, focused, spot

    Correct Answer
    A. Barrage, spot, swept spot
    Explanation
    The correct answer is barrage, spot, swept spot. Noise jamming is a technique used to disrupt radar signals. Barrage jamming involves transmitting a broad spectrum of noise signals to overwhelm the radar receiver. Spot jamming focuses on jamming a specific frequency or narrow bandwidth. Swept spot jamming involves sweeping the jamming signal across a range of frequencies. These three types of noise jamming are commonly used to interfere with radar systems.

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  • 20. 

    (403b) Which of the following automatically inflates when the canopy is closed and locked, and enables the cockpit to be pressurized?

    • COMBAT EDGE

    • Fighter Canopy Seals

    • Hydraulic Control Unit

    • Hydraulic Pressure Unit

    Correct Answer
    A. Fighter Canopy Seals
    Explanation
    Fighter Canopy Seals automatically inflate when the canopy is closed and locked, and enable the cockpit to be pressurized. These seals create a tight seal between the canopy and the cockpit, preventing any air leakage and maintaining the pressurized environment inside the cockpit. This is crucial for ensuring the safety and comfort of the pilot during high-altitude flights. The other options mentioned, such as Combat Edge, Hydraulic Control Unit, and Hydraulic Pressure Unit, do not directly relate to the pressurization of the cockpit.

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  • 21. 

    (403b) In which of the following is cabin pressure maintained at 10.9 psi?

    • Isobaric range

    • Isotonic range

    • Himalayan range

    • Differential range

    Correct Answer
    A. Isobaric range
    Explanation
    The correct answer is Isobaric range. In an isobaric range, the cabin pressure is maintained at a constant level of 10.9 psi. This means that the pressure inside the cabin remains the same regardless of changes in altitude or external atmospheric pressure. Isotonic range refers to a range of equal tension in muscles, and Himalayan range refers to a mountain range. Differential range does not specifically relate to cabin pressure.

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  • 22. 

    (403b) Which of the following contains these as its main components: Mask, counter-pressure vest, mask tensioning bladder, oxygen regulator?

    • OBOGS

    • COBRA JUDGY

    • COMBAT EDGE

    • STRYKER TRIDENT

    Correct Answer
    A. COMBAT EDGE
    Explanation
    The correct answer is COMBAT EDGE. COMBAT EDGE is the system used in fighter aircraft to provide pilots with a continuous supply of oxygen during high-altitude flights. The main components of the COMBAT EDGE system include a mask, counter-pressure vest, mask tensioning bladder, and oxygen regulator. These components work together to ensure that pilots receive the necessary oxygen levels and maintain proper breathing during flight.

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  • 23. 

    (402e) What allows an aircraft to both fly at low altitudes and deliver IR missiles and unguided missiles, and is comprised of two pods?

    • Low Altitude Navigation Targeting Infared for Night (LANTIRN)

    • LLTV

    • Joint Surveillance Target Radar System (JSTARS)

    • Forward Looking Infrared (FLIR)

    Correct Answer
    A. Low Altitude Navigation Targeting Infared for Night (LANTIRN)
    Explanation
    LANTIRN is the correct answer because it is a system that enables aircraft to fly at low altitudes while delivering both IR missiles and unguided missiles. It consists of two pods, one for navigation and targeting (LANTIRN-N) and one for infrared detection and targeting (LANTIRN-T). This system enhances the aircraft's ability to operate in low light and adverse weather conditions, providing improved navigation, targeting, and weapon delivery capabilities.

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  • 24. 

    (402e) The Sniper Advanced Targeting Pod (ATP) can acquire targets greater than what range?

    • 25,000 feet

    • 8000 feet

    • 50,000 feet

    • 80,000 feet

    Correct Answer
    A. 50,000 feet
    Explanation
    The Sniper Advanced Targeting Pod (ATP) is capable of acquiring targets at a range of 50,000 feet. This means that the pod can accurately detect and track targets that are up to 50,000 feet away from the aircraft. This long range capability allows the pod to provide valuable situational awareness and targeting information to the pilot, enhancing their ability to engage and neutralize threats from a safe distance.

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  • 25. 

    (403c) What is the total absence of oxygen?

    • Hypoxia

    • Anoxia

    • No supplemental oxygen

    • Humidity

    Correct Answer
    A. Anoxia
    Explanation
    Anoxia refers to the total absence of oxygen. It occurs when there is a severe lack of oxygen supply to the body or a specific organ. This can lead to tissue damage or even death if not treated promptly. Hypoxia, on the other hand, refers to a reduced level of oxygen in the body or tissues, but not a complete absence. The options "No supplemental oxygen" and "Humidity" are unrelated to the absence of oxygen and are incorrect answers.

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  • 26. 

    (403c) What maintenance is never done in conjunction with other aircraft maintenance?

    • Hydraulic system servicing

    • MSOGS

    • OBOGS

    • LOX

    Correct Answer
    A. LOX
    Explanation
    LOX stands for Liquid Oxygen, which is used in aircrafts for breathing purposes at high altitudes. Unlike the other options, LOX maintenance is never done in conjunction with other aircraft maintenance. This is because LOX requires special handling and storage procedures, and any maintenance or servicing involving LOX must be carried out separately to ensure safety. Mixing LOX maintenance with other maintenance activities could potentially lead to safety hazards and is therefore avoided.

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  • 27. 

    (403c) What is used to service the GOX system?

    • Vent valve

    • Filler valve

    • Rupture disk

    • Side door

    Correct Answer
    A. Filler valve
    Explanation
    The filler valve is used to service the GOX system. It is responsible for filling the system with the necessary gas.

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  • 28. 

    (403d) What is the first action in the sequence for the fire extinguishing system?

    • Propeller feathers on turboprop engines

    • Fuel, oil, hydraulic, bleed air shutoff valves close

    • Fire extinguishing circuits are energize

    • Directional control valve positions

    Correct Answer
    A. Fuel, oil, hydraulic, bleed air shutoff valves close
    Explanation
    The first action in the sequence for the fire extinguishing system is the closing of the fuel, oil, hydraulic, and bleed air shutoff valves. This is done to isolate the source of the fire and prevent the flow of flammable substances that could fuel the fire. By closing these valves, the system ensures that the fire is contained and does not spread further.

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  • 29. 

    (402c) What type of navigation system uses good visibility, map, and compass to get to a destination, but is not very accurate? 

    • Visual

    • Dead Reckoning

    • Radio

    • Radar

    Correct Answer
    A. Dead Reckoning
    Explanation
    Dead Reckoning is a type of navigation system that relies on good visibility, a map, and a compass to reach a destination. However, it is not very accurate because it does not take into account external factors such as wind speed and direction, currents, or other variables that can affect the course of travel. Instead, it estimates the position based on a previously known location and the direction and distance traveled since then. This method can lead to cumulative errors over time, making it less precise compared to other navigation systems.

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  • 30. 

    (402c) What action point is used for targeting weapons when target is obscured from radar? 

    • Target Point

    • Fixed Point

    • Initial Point

    • Offset Aim Point

    Correct Answer
    A. Offset Aim Point
    Explanation
    When the target is obscured from radar, the Offset Aim Point is used to target weapons. This means that instead of directly aiming at the target, the weapons are aimed at a specific point offset from the target. This allows for more accurate targeting and increases the chances of hitting the target even when it cannot be directly detected by radar.

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  • 31. 

    (402c) Which type of navigation system provides relative bearing and altitude to nearby aircraft? 

    • Traffic Alert and Collision Avoidance System (TCAS) II

    • Enhanced Ground Proximity Warning System

    • Offensive Avionics Systems

    • Ground Proximity Warning System

    Correct Answer
    A. Traffic Alert and Collision Avoidance System (TCAS) II
    Explanation
    The Traffic Alert and Collision Avoidance System (TCAS) II provides relative bearing and altitude to nearby aircraft. This system helps pilots to detect and avoid potential collisions with other aircraft by providing them with real-time information about the position and altitude of nearby planes. It uses transponder signals to determine the distance, bearing, and altitude of other aircraft and then provides this information to the pilot through visual and audio alerts. This helps pilots to maintain a safe separation from other aircraft, especially in congested airspace.

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  • 32. 

    (401a) What aircraft lighting system identifies aircraft outline and direction of flight?

    • In-flight inspection lights

    • Exterior lights

    • Navigation / Position lights

    • Formation lights

    Correct Answer
    A. Navigation / Position lights
    Explanation
    Navigation/Position lights are used to identify the aircraft's outline and direction of flight. These lights are typically located on the wingtips and tail of the aircraft and are required to be illuminated during all phases of flight. The red light is located on the left wingtip, the green light on the right wingtip, and the white light on the tail. These lights help other pilots and air traffic controllers to determine the aircraft's position, direction, and orientation in the sky, enhancing safety and preventing collisions.

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  • 33. 

    (402a) What enables aircraft to determine the range and bearing of other aircraft?

    • Radar altimeter

    • Rendezvous beacon

    • Terrain Avoidance

    • Terrain Following

    Correct Answer
    A. Rendezvous beacon
    Explanation
    Rendezvous beacons enable aircraft to determine the range and bearing of other aircraft. These beacons are used for navigation and communication purposes, allowing aircraft to locate and communicate with each other. They emit signals that can be detected by other aircraft, helping them determine the distance and direction of nearby aircraft. This information is crucial for maintaining safe separation and avoiding collisions in the air. Radar altimeter, terrain avoidance, and terrain following are not directly related to determining the range and bearing of other aircraft.

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  • 34. 

    (403a) What is the purpose of the Bleed Air System?

    • Provide engine thrust air

    • Provide a hostile environment for aircrew

    • provide hot pressurized air for cabin AC, temperature control, and anti-ice.

    • Bypass secondary air

    Correct Answer
    A. provide hot pressurized air for cabin AC, temperature control, and anti-ice.
    Explanation
    The purpose of the Bleed Air System is to provide hot pressurized air for cabin AC, temperature control, and anti-ice. This system takes air from the engine compressor and delivers it to various components within the aircraft, such as the air conditioning system, temperature control system, and anti-ice system. This ensures that the cabin is kept at a comfortable temperature, the air is filtered and circulated, and the aircraft's surfaces are protected from ice formation.

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  • 35. 

    (403a) What controls airflow and will shutoff airflow in case of a fire?

    • Engine bleed air shutoff valve

    • Check valve

    • Master bleed air switch

    • Engine throttles

    Correct Answer
    A. Engine bleed air shutoff valve
    Explanation
    The engine bleed air shutoff valve controls the airflow and is designed to shut off the airflow in case of a fire.

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  • 36. 

    (403c) What is the deficiency of oxygen in the bloodstream for body tissue?

    • Unhealthy weight

    • Anoxia

    • Hypoxia

    • Very high altitude

    Correct Answer
    A. Hypoxia
    Explanation
    Hypoxia refers to the deficiency of oxygen in the bloodstream for body tissue. This condition occurs when there is a decrease in the amount of oxygen reaching the tissues, leading to inadequate oxygen supply for normal cellular function. It can be caused by various factors such as lung diseases, heart problems, high altitudes, or carbon monoxide poisoning. Hypoxia can result in symptoms like shortness of breath, confusion, dizziness, and can have serious consequences if left untreated.

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  • 37. 

    (403c) What valve is installed to prevent reverse flow of gaseous oxygen (GOX)?

    • Pressure Closing Valve

    • Supply Line Valve

    • Liquid Check Valve

    • Manual Shut-off Valve

    Correct Answer
    A. Liquid Check Valve
    Explanation
    A liquid check valve is installed to prevent reverse flow of gaseous oxygen (GOX). This type of valve allows the flow of fluid in one direction and prevents backflow by automatically closing when the pressure on the outlet side exceeds the pressure on the inlet side. In the case of gaseous oxygen, the liquid check valve ensures that oxygen flows only in the desired direction and prevents any reverse flow, which could be potentially dangerous.

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  • 38. 

    (403c) Which of the following uses ambient air to warm the gaseous oxygen for supply to the oxygen regulators?

    • Build up coils

    • Pressure demand regulators

    • Heat exchanger plates

    • Pressure closing valve

    Correct Answer
    A. Heat exchanger plates
    Explanation
    Heat exchanger plates are used to warm the gaseous oxygen by utilizing ambient air. These plates are designed to transfer heat from the surrounding air to the oxygen, raising its temperature before it is supplied to the oxygen regulators. This process ensures that the oxygen is at an appropriate temperature for use, optimizing its effectiveness and safety.

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  • 39. 

    (403e) What type of ice has a heavy smooth texture and forms on the leading edges of aircraft at higher speeds?

    • Rime

    • Glaze

    • Frost

    • Shaved

    Correct Answer
    A. Glaze
    Explanation
    Glaze is the correct answer because it refers to a type of ice that has a heavy smooth texture and forms on the leading edges of aircraft at higher speeds. Glaze ice is formed when supercooled water droplets freeze on contact with the aircraft surfaces. It is denser and more transparent than rime ice, which forms when water droplets freeze slowly and create a rough, opaque texture. Frost and shaved ice are not specific to aircraft icing conditions and do not have the same characteristics as glaze ice.

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  • 40. 

    (402b) What has Anti-Jam feature for UHF radios and works on principle of frequency hopping? 

    • Station Keeping Equipment

    • AFSATCOM

    • Have Quick

    • Interphone Systems

    Correct Answer
    A. Have Quick
    Explanation
    Have Quick is the correct answer because it is a feature that provides anti-jam capabilities for UHF radios. It operates on the principle of frequency hopping, which means that it rapidly changes frequencies during transmission to avoid being jammed or intercepted by adversaries. This feature is commonly used in military communication systems to ensure secure and reliable communication in hostile environments.

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  • 41. 

    (403b) Which of the following is the “brain” of the pressurization system and allows pressure changes at a rate that prevents injury or discomfort to crew or passengers?

    • Combination Unit

    • Pressure Relief Valve

    • Cabin Pressure Regulator

    • Power Control and Distribution Unit

    Correct Answer
    A. Cabin Pressure Regulator
    Explanation
    The cabin pressure regulator is responsible for controlling and maintaining the cabin pressure in an aircraft. It ensures that pressure changes occur at a rate that is safe and comfortable for both the crew and passengers. By regulating the pressurization system, the cabin pressure regulator prevents any potential injuries or discomfort that could arise from rapid pressure changes. Therefore, it can be considered as the "brain" of the pressurization system.

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  • 42. 

    (402f) What displays the aircraft's actual airspeed?

    • Indicated Airspeed

    • True Airspeed Indicator

    • Groundspeed

    • Maximum Allowable Airspeed Indicator

    Correct Answer
    A. True Airspeed Indicator
    Explanation
    The True Airspeed Indicator displays the aircraft's actual airspeed. This instrument takes into account the altitude and temperature to provide an accurate measurement of the aircraft's speed through the air. Unlike the Indicated Airspeed, which is based on the pressure readings from the pitot-static system, the True Airspeed Indicator compensates for the variations in air density at different altitudes. Groundspeed, on the other hand, measures the speed of the aircraft relative to the ground and is affected by factors such as wind. The Maximum Allowable Airspeed Indicator is not a valid instrument and does not display the actual airspeed.

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  • 43. 

    (403a) What carries conditioned air to avionics components?

    • Distribution ducks

    • Boats and hose

    • Distribution ducts

    • Rubber ducts

    Correct Answer
    A. Distribution ducts
    Explanation
    Distribution ducts carry conditioned air to avionics components. These ducts are responsible for distributing the air throughout the aircraft to ensure that the avionics components receive the necessary cooling and ventilation. They are designed to efficiently and effectively deliver the conditioned air to the specific areas where it is needed, ensuring proper functioning and performance of the avionics systems.

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  • 44. 

    (401a) A relay is a(n)....

    • Current varying switch

    • Multiple position switch

    • Electrically operated mechanical switch

    • Fuse that withstands large current flow for short time

    Correct Answer
    A. Electrically operated mechanical switch
    Explanation
    A relay is an electrically operated mechanical switch. It is a device that uses an electromagnet to mechanically open or close a circuit. When an electrical current is applied to the electromagnet, it creates a magnetic field that attracts or releases a movable armature, thereby opening or closing the circuit. Relays are commonly used in electrical systems to control a high-power circuit with a low-power signal, allowing for the control of larger currents or voltages by a smaller control signal.

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  • 45. 

    (401a) What are typical aircraft AC generators rated at?

    • 115/200 VAC, four-phase, 400 hertz

    • 115/220 VAC, three-phase, 400 hertz

    • 115/200 VAC, three-phase, 800 hertz

    • 115/200 VAC, three-phase, 400 hertz

    Correct Answer
    A. 115/200 VAC, three-phase, 400 hertz
    Explanation
    Typical aircraft AC generators are rated at 115/200 VAC, three-phase, 400 hertz.

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  • 46. 

    (401a) Which of the following is not a possible AC emergency generator?

    • Hydraulic Motor

    • Auxiliary Power Unit (APU)

    • Air Turbine Motor (ATM)

    • Emergency Activation Unit (EAU)

    Correct Answer
    A. Emergency Activation Unit (EAU)
    Explanation
    The given question asks for the option that is not a possible AC emergency generator. The options provided are Hydraulic Motor, Auxiliary Power Unit (APU), Air Turbine Motor (ATM), and Emergency Activation Unit (EAU). The correct answer is Emergency Activation Unit (EAU). The other three options, Hydraulic Motor, APU, and ATM, are all possible AC emergency generators.

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  • 47. 

    (403c) What is a multifunction unit that stores liquid oxygen, converts it gas, maintains system pressure and relieves any excess pressure?

    • Pressurization System

    • Bleed Air System

    • LOX Converter

    • Communication and Navigation Systems

    Correct Answer
    A. LOX Converter
    Explanation
    A LOX Converter is a multifunction unit that stores liquid oxygen, converts it to gas, maintains system pressure, and relieves any excess pressure. This unit is responsible for ensuring the proper handling and storage of liquid oxygen, converting it to a usable gas form, and maintaining the necessary pressure levels within the system. It also has safety mechanisms in place to relieve any excess pressure that may build up.

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  • 48. 

    What is the primary/normal source of DC power for aircraft?

    • Aircraft battery

    • Transformer Rectifiers

    • Generator Control Unit

    • DC Bus Bars

    Correct Answer
    A. Transformer Rectifiers
    Explanation
    Transformer rectifiers are the primary/normal source of DC power for aircraft. They are responsible for converting the alternating current (AC) power from the aircraft's generators into direct current (DC) power. This DC power is used to operate various electrical systems and components on the aircraft, such as lights, avionics, and other critical systems. The transformer rectifiers ensure a consistent and reliable power supply to meet the aircraft's electrical demands during flight.

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  • 49. 

    (402c) Which radio navigation is found on all aircraft and operates in UHF range? 

    • Automatic Direction Finding (ADF)

    • VHF omni-directional Range (VOR)

    • Tactical Air Navigation (TACAN)

    • Distance Measuring Equipment (DME)

    Correct Answer
    A. Tactical Air Navigation (TACAN)
    Explanation
    TACAN is the correct answer because it is a radio navigation system that is found on all aircraft and operates in the UHF range. ADF, VOR, and DME are also radio navigation systems, but they do not meet the criteria of being found on all aircraft and operating in the UHF range.

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Quiz Review Timeline (Updated): Mar 21, 2023 +

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

  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Aug 18, 2016
    Quiz Created by
    Mark Creel

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