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Correct CHOICE is (b) BOEING 787

Easy explanation: The Boeing 787 was the FIRST commercial aircraft with 50% of its structure weight made of carbon-fiber composites, along 20% Aluminum and 15% TITANIUM. It first flew in 2009.

Right choice is (a) To decrease DRAG

The best I can explain: Aircrafts have landing gear that retract into the wings and/or FUSELAGE to decrease drag during flight. Drag slows down the aircraft, thus increasing the FLYING time between TWO places.

Right OPTION is (d) LANDING gear

Explanation: The main PARTS of the airframe are the fuselage, wing, stabilizing tail and undercarriage. The landing gear is not a part of the airframe.

Right option is (a) Aluminum alloys

The best EXPLANATION: The aircraft fuselage is made of aluminum alloys along with other MATERIALS such as Zn, Mg and Cu. However modern AIRCRAFTS have started using carbon fiber materials in order to decrease the aircraft WEIGHT and in turn increase performance.

The correct answer is (a) True

For EXPLANATION: The wings of an aircraft are responsible for PRODUCING lift. MANY different styles and ARRANGEMENTS of wings have been used on heavier than air aircrafts. Some lighter than air aircraft ALSO have wings.

Right CHOICE is (c) Undercarriage

Explanation: The LANDING gears are ALSO KNOWN as undercarriage. It is the structure that supports an aircraft when it is not flying and allows it to take off, land and taxi.

Correct answer is (d) Landing gear

Explanation: Landing gear is the structure that supports an AIRCRAFT when it is not flying and ALLOWS it to MANOEUVRE on the ground. Most commonly, wheels are USED but other equipment such as floats and skids can also be used, depending on the surface.

The CORRECT choice is (b) Reduce turbulence at the tips of an airplane’s wings

The explanation is: The purpose of winglets is to reduce turbulence at the tips of an airplane’s wings. Winglets and sharklets are SIMILAR to each other. The wingtip vortices created by a LARGE AIRCRAFT are strong enough to flip a smaller aircraft that maybe flying closely. Winglets are responsible to break these vortices thereby reducing drag on the airplane.

Right choice is (B) Empennage

The EXPLANATION: The stabilizing tail is also KNOWN as the empennage. It is a structure at the rear END of an aircraft that provides stability during flight, in a WAY similar to the feathers on an arrow.

Correct option is (a) True

The explanation is: The fuselage is an aircraft’s MAIN body SECTION containing the cockpit or flight DECK along with the passenger cabin and CARGO hold. It also often CONTAINS the engine(s).

Right choice is (c) Cirrus SR20

For explanation: The first widely produced AVIATION aircraft with all COMPOSITE construction was Cirrus SR20. It first FLEW in 1995 and has a cruise speed of 287km/h.

Right choice is (d) Wood

The best I can explain: The earliest AIRCRAFT were constructed PRIMARILY of wood. Many newly certified aircraft are BUILT from moulded composite materials, such as CARBON fiber and titanium alloys.

Right option is (d) TURBOFAN

To EXPLAIN: The General Electric GE90 is a family of high-bypass turbofan aircraft ENGINES. It is built for the Boeing 777 by GE AVIATION. The engine OFFERS thrust ratings from 81,000 to 115,000 lb.

Right answer is (b) THERMAL retraction system

The EXPLANATION: AIRCRAFT retraction systems can be manually, electrically or HYDRAULICALLY operated. HOWEVER, there are no thermal retraction systems in aircrafts. The retraction systems are required to reduce drag.

The CORRECT option is (B) MECHANICAL

To ELABORATE: An aircraft engine is a COMPONENT of the propulsion system for an aircraft that generates mechanical power. The power generated is used to keep the aircraft flying high in the air.

The correct choice is (a) 200-400 mph

Easy EXPLANATION: Turboprops are extremely efficient when operated at cruise speeds of 200 to 400 mph. This is the ideal cruise speed for such ENGINES, THUS providing such efficiency.

Correct option is (a) True

The explanation: True, in jet engines the OXYGEN necessary for fuel combustion comes from the air. The jet engines TAKE in required oxygen through the engine blades and the process of combustion takes PLACE.

The correct answer is (a) 4

The best I can EXPLAIN: There are 4 channels in a commercial type RECORDER. They are Pilot, Co-pilot, CREW, and Centre-Area. The CVR is helpful in probing details of an aircraft crash, in CASE it happens.

Correct answer is (c) Concorde

The explanation: Concorde was the LAST airliner that USED turbojet. The Mach 2 AIRSPEED offered by Concorde proved the engine to be highly efficient. Other aircrafts could not match such AIRSPEEDS.

Correct option is (B) 4

To EXPLAIN: There are FOUR types of gas TURBINE engines: the turbojet, the TURBOFAN, the turboprop, and the turboshaft.

Right CHOICE is (b) PRATT & Whitney

Best explanation: In general AVIATION, the dominant manufacturer of turboprop engines has been Pratt & Whitney. However, General Electric in 2015 its ENTRANCE into the market.

Right answer is (d) Helicopters

For explanation: TURBOSHAFT ENGINES are used PRIMARILY for helicopter. A turboshaft engine is similar to a TURBOPROP in principle, but in turboshaft the engine does not provide any physical support to the helicopter’s rotors.

Correct option is (a) TETRAETHYLLEAD

The BEST I can EXPLAIN: Tetraethyllead (TEL) is blended with aviation gasoline, to be used as a fuel for AIRCRAFTS. The blend increases the fuel EFFICIENCY.

Right choice is (a) Aeronautical Radio, INCORPORATED

Explanation: ARINC refers to Aeronautical Radio, Incorporated. It is owned by Collins Aerospace and was FOUNDED in 1929. It PROVIDES transport communication systems for various industries LIKE AVIATION, defense and healthcare.

The CORRECT answer is (b) Airlines Electronic ENGINEERING Committee

Explanation: The Airlines Electronic Engineering Committee (AECC) is the organization responsible for stating the INTERNATIONAL standards for AVIONICS equipment’s. The equipment also satisfies ARINC standards.

Correct answer is (d) Empennage

Best explanation: The empennage acts as a stabilizer and is located on the TAIL of the AIRCRAFT. It is not a part of the avionic systems. However, flight recorders, WEATHER radars and communication systems are all part of the avionic SYSTEM.

The correct choice is (d) 136.975 MHZ

The explanation: Aviation systems USING VHF work between the airband from 118.000 MHz to 136.975 MHz. In Europe, ADJACENT channels are spaced by 8.33 kHz and 25 kHz elsewhere.

Right answer is (b) True

To ELABORATE: The onboard COMMUNICATIONS between the pilots and crew, crew and passengers and pilots and passengers are all MADE using aircraft intercoms and onboard communication systems INSTALLED on the aircraft.

Right choice is (a) Lawrence Sperry

The best I can explain: The AUTOPILOT feature was invented by Lawrence Sperry. It was introduced during the Second World War to ensue bomber planes fly STEADY enough to HIT PRECISION targets from thousands of feet in the sky.

Right CHOICE is (B) Wide Area Augmentation System

The best explanation: WAAS refers to Wide Area Augmentation System. It is an air NAVIGATION system developed by the FAA, DESIGNED to improve the precision of GPS.

The CORRECT answer is (c) Operated at higher frequencies

The best I can explain: LORAN refers to Long Range NAVIGATION. It was a system developed during the Second WORLD War in the USA. It was operated at lower frequencies and offered a range up to 1,500 MILES.

Correct CHOICE is (b) FBI

Easy explanation: The Federal AVIATION Administration regulates the safety and reliability STANDARDS of avionic and other AIRCRAFT EQUIPMENT, in the USA. The regulating authorities are different for other countries in the world. For example, DGCA regulates the safety and reliability standards of avionic and other aircraft equipment in India.

Correct option is (a) Weather RADAR

Best explanation: The ARINC 708 is a weather radar USED in commercial AIRCRAFTS. It is not the sole radar used to determine weather conditions around the aircraft, it is supplemented by various other ground SENSING and proximity radars.

Correct option is (B) Terrain-following radar

For explanation I would SAY: Terrain-following radar (TFR) help aircrafts fly at low altitudes. These are FITTED into aircrafts which fly relatively close to the ground at a constant flight level. Such FLIGHTS are SOMETIMES referred to as terrain hugging flights.

The CORRECT answer is (d) ARINC 429

To explain I would SAY: The ARINC 429 is a data transfer standard for aircraft avionics. It is an alternative to MIL-STD-1553. It has a self-synchronizing and self-clocking data bus protocol. It has a 32 bit data word.

The correct option is (c) Flight management SYSTEMS

Easiest explanation: FMS is an abbreviation for flight management systems. Most commercial aircrafts with autopilot USE FMS, so that the aircraft can KEEP flying without the PILOT’s intervention in some CERTAIN phases of the flight.

The correct answer is (a) False

To EXPLAIN I would SAY: Sonobuoys are used to determine the location of enemy submarines. They are relatively small buoys, which are dropped from aircrafts deployed on underwater research and WARFARE.

Right choice is (c) Radar

Best explanation: The GROUND-proximity warning systems USE radar altimeters. The GPWS is USED to avoid the aircraft being UNINTENTIONALLY flown into the ground or an obstacle. It improves FLIGHT safety.

Correct ANSWER is (d) Grumman F-14 Tomcat

To ELABORATE: The Grumman F-14 Tomcat was the first U.S. jet fighter with TWIN TAILS. It first flew on 21 December 1970 and was deployed with the U.S. NAVY in 1974. The aircraft was retired from the U.S. Navy in September 2006.

The correct choice is (a) Terrain awareness warning system

The explanation: TAWS refers to the Terrain awareness warning system, it may ALSO be called a controlled FLIGHT into terrain. The system is used for avoiding unintended IMPACTS with the GROUND during the FLYING phases.