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Correct CHOICE is (b) Chloride based

The best EXPLANATION: Compounds primarily based on chloride are not used at airports around the WORLD. Such compounds result in increased corroding on aircrafts and other equipment’s. Salts are an EXAMPLE of chloride based compounds.

Correct choice is (d) De pressurization

Easiest explanation: De pressurization is not CAUSED due to ICE on aircraft. However, ice can CAUSE critical control surfaces to become ROUGH and UNEVEN, which disrupts smooth air flow along with increased drag.

Correct OPTION is (C) Urea mixture

Explanation: Urea mixture is an ECONOMICAL de-icing mixture USED PRIMARILY for deicing airport pavements. After application, the mixture gets converted into ammonia and thus has been phased out of most airports around the world.

The correct option is (b) True

For EXPLANATION: True, propylene GLYCOL is less toxic than ethylene glycol. Although PG is classified as non-toxic, it pollutes waterways as it consumes LARGE amounts of oxygen while decomposing.

Right answer is (a) LIMITED

To EXPLAIN I WOULD say: All anti-ice fluids offer limited PROTECTION. The protection is dependent upon frozen contaminant TYPE and the prevailing weather conditions.

Correct answer is (b) DECREASES COEFFICIENT of LIFT

For explanation: Slats produce a higher coefficient of lift, due to a SUITABLE angle of attack and speed. However, they decrease stall speed and help the aircraft to fly at slower SPEEDS.

Correct choice is (c) FLEXIBLE WINGS

For explanation: Flexible wings is a prominent APPROACH that could rival SLATS. One such PROJECT is the X-53 Active Aero elastic Wing, which is a NASA effort.

Correct answer is (B) Attack

The best I can EXPLAIN: The SLATS allow the AIRCRAFT to operate at a higher angle of attack. They are usually retracted in normal FLIGHT phases to minimize drag.

The CORRECT choice is (B) True

Explanation: True, springs extend the automatic SLATS. As an aircraft slows down, the aerodynamic force is REDUCED and springs are used to extend the slats. Such slats are not USUALLY found on modern aircrafts.

Correct CHOICE is (a) TRAILING EDGE

Easy explanation: FLAP systems run along the trailing edge of the wing of an aircraft. Flaps are one of the many devices used on aircraft to control its LIFT.

The CORRECT ANSWER is (a) 1918

Explanation: Slats were first developed in 1918, by Gustav Lachmann. Lachmann presented a patent for LEADING edge slats in GERMANY, in the year 1918.

Correct OPTION is (b) True

The best I can explain: True, the fixed slat is permanently extended. It is SOMETIMES USED on SPECIALIST low speed aircrafts or when simplicity is favored over speed.

The correct OPTION is (C) Powered

The best I can explain: Powered slats are most COMMONLY USED on airliners. These slat extensions can be CONTROLLED by the pilot and thus are most favorable to be used on airliners.

Correct option is (a) Automatic

For explanation I WOULD SAY: Handley-Page SLATS refer to automatic slats. Slats may be classified into three categories: Automatic, POWERED and FIXED.

Right option is (c) Negative Flap SETTING

To elaborate: In ORDER to reduce the nose down pitching moment, the aircraft uses the negative flap setting. The setting is used at higher speeds and helps reduce the trim drag on the aircraft.

Right option is (a) INCREASE

The EXPLANATION: The flaps are used to increase the LIFT. Flaps are a kind of high-lift device that increases the lift of an aircraft at a GIVEN airspeed and help the aircraft ADJUST the flow of wind over its wings.

Right option is (a) WINGS

To elaborate: The flaps are located on the leading EDGE of the wings. They are one of the several high lift devices USED on aircrafts to INCREASE the lift.

Right answer is (b) True

Explanation: True, FLAPS REDUCE the minimum speed at which the aircraft will SAFELY MAINTAIN flight. His is because they raise the maximum lift coefficient or the upper limit to the lift a wing can generate.

The correct option is (b) Decrease drag in mid flight

For EXPLANATION: Flaps do not decrease drag in id flight, however they INCREASE the drag if not retracted during mid-flight. THUS while flaps are only DEPLOYED during takeoff or landing.

Right option is (d) ACROSS

Explanation: Crosswinds are winds across the line of flight. These winds cause the windward SIDE of the AIRCRAFT to GENERATE more lift and drag.

The CORRECT answer is (a) Boeing 747

For explanation I would say: The Boeing 747 has an inboard AILERON. However, the AIRBUS A380, A340 and A330 aircrafts have no inboard aileron.

Right option is (c) Flexible Flaps

Easy explanation: The term FlexFoil in aviation terminology REFERS to flexible flaps. It is a modern TECHNIQUE that FUNCTIONS by BENDING a lattice that in turn changes the AIRFOIL shape of the aircraft.

Right answer is (b) True

The explanation is: True, flap deployment DECREASES AIRCRAFT pitch angle. This in TURN lowers the nose of the aircraft thereby improving the pilot’s view of the RUNWAY during landing.

Right choice is (a) Slotted flap

The best EXPLANATION: Flaps with one or more slots are CALLED slotted flaps. These slots are designed to increase their effectiveness. They provide INCREASED lift as COMPARED to a SPLIT flap.

The correct answer is (d) Continuous TRAILING-EDGE Flap

To explain I would say: The term CTEF in aviation terminology REFERS to Continuous Trailing Edge Flap. The device USES various mechanical hinges that are deployed to improve system reliability and stability.

Right choice is (B) Ailerons

Best explanation: The ailerons provide LATERAL CONTROL to an aircraft, rather than changing its LIFT CHARACTERISTICS. When an aileron on one wing decreases the lift, the opposite aileron in turn increases the lift.

Correct answer is (B) AILERON

For explanation: The trim tabs in an aircraft are commonly located at or near the TRAILING edge of the aileron. These tabs are basically small and movable sections that resemble and work similar to scaled down ailerons.

The correct choice is (a) FALSE

The best I can explain: False, the airbrakes are USED to increase drag. They ALLOW the aircraft to decelerate RAPIDLY and can be deployed at high SPEEDS.

The CORRECT option is (a) Roll

To elaborate: The ailerons are used to CONTROL the AIRCRAFT in roll. Roll refers to the movement of the aircraft around its longitudinal AXIS. This is a VITAL and crucial aspect of flight control.

The correct answer is (a) False

To explain I would say: False, the MODERN AILERON was invented 1868 and patented in the same year. It was invented by the British scientist Matthew Piers Watt Boulton based on his 1864 paper on AERIAL LOCOMOTION.

Right ANSWER is (d) Banking

Explanation: The AIRCRAFTS movement around its longitudinal axis is called banking. It may also be referred to as rolling and it results in a change in flight PATH DUE to the TILTING of the lift vector.

Right CHOICE is (a) RUDDER

The explanation is: The adverse yaw is effectively compensated by the use of the rudder. It results in a side force on the vertical tail which in turn opposes the adverse yaw by creating a FAVORABLE YAWING moment.

The correct option is (a) False

The best EXPLANATION: False, the trim tabs come in TWO forms: ADJUSTABLE and fixed. These tabs are provided to adjust or trim out the pressure needed against any unwanted movement.

Correct answer is (a) Adjustable TRIM tab

The best EXPLANATION: The adjustable trim tab can be CONTROLLED from WITHIN the cockpit. It is locate such that DIFFERENT power settings or flight attitudes can be compensated for.

The CORRECT answer is (C) Ailerons

Explanation: The spoilers may also be differentially OPERATED for roll control in place of ailerons. Such spoilers were first developed in 1948 by Martin Aircraft.

Right choice is (b) Adverse yaw

The best EXPLANATION: Adverse yaw is an unwanted SIDE EFFECT of aileron. Adverse yaw refers to a yawing moment in the opposite direction to the ROLL.

The CORRECT answer is (b) True

The best explanation: True, spoilers are used to SUPPLEMENT ailerons. They are devices which when EXTENDED into the airflow over a WING, DISRUPT the airflow.