[Xmat]

Q1. The ________ usually tends towards longitudinal instability in an aeroplane.
(A) Pitching of main plane
(B) Rolling movement of main plane
(C) Rolling movement of tail plane

Q2. A control cable s structurally constructed from:
(A) Individual wires
(B) Strands
(C) Strands which contain wires

Q3. As the angle of attack of a increases VERY LITTLE , the center of pressure (CP) behaves in what manner?
(A) Remains static/stationary
(B) Moves rearward toward the trailing edge
(C) Moves forward toward the leading edge

Q4. The halfway condition between stability and instability is referred to as:
(A) Neutral stability
(B) Out of trim condition
(C) Perfect stability

Q5. Mark the correct statement regarding the application of vortex generators on an aircraft:
(A) Placed on the wing surface, they improve low-speed characteristics; placed on the tail surface, they increase high-speed characteristics.
(B) Placed on the wing surface, they improve high-speed characteristics; placed on the tail surface, they increase low-speed characteristics.
(C) Placed on both the wing surface and the tail surface, they increase high-speed characteristics.

Q6. Which of the following statements is true regarding sweepback wings?
(A) They decrease the aspect ratio and increase induced drag at higher angles of incidence.
(B) They increase the aspect ratio and decrease induced drag.
(C) They are not used for passenger/transport category aircraft.
(D) None of the above

Q7. The laminar flow nature of a boundary layer typically begins near the ________ of the body.
(A) Leading edge
(B) Lower surface
(C) Upper surface
(D) Trailing edge

Q8. Specific range (or air specific range) is typically measured in which of the following units?
(A) Meter per Newton of fuel
(B) Meter per kg of weight
(C) Meter per power of thrust
(D) None of the above

Q9. For an aircraft to maintain level flight, the relationship between the power curves dictates that:
(A) The power available curve must be above the power required curve.
(B) The power available curve must be below the power required curve.
(C) The power available curve must intersect or equal the power required curve.

Q10. In a steady, straight-and-level flight, to keep the aircraft moving at a constant velocity:
(A) Thrust must equal drag.
(B) Lift must equal weight.
(C) Both (A) and (B) must be true.
(D) Neither (A) nor (B) are required.

Q11. The altitude at which there is only one possible airspeed for level flight and the maximum rate of climb drops to zero (nil) is defined as the:
(A) Service ceiling
(B) Absolute ceiling
(C) Absolute altitude
(D) Pressure altitude

Q12. Induced drag is PART OF ?
(A) Lift
(B) Total Drag
(C) Thrust
(D) Weight

Q13. An aerodynamic stall can occur under which of the following conditions?
(A) Only at high pitch and high altitude.
(B) Only at high airspeeds.
(C) At any pitch and attitude
(D) None of the above

Q14. To overcome ________ and move the aircraft forward through the air, engine thrust is required.
(A) Drag
(B) Speed
(C) Weight
(D) Lift

Q15. Under normal, lift-producing conditions, where is static surface pressure relatively higher on an aerofoil section?
(A) Upper surface
(B) Lower surface

Q16. Which of the following aerodynamic phenomena is associated with flow at a higher Reynolds number?
(A) The boundary layer is turbulent
(B) Boundary layer flow separation is delayed
(C) the coefficient of drag decreases considerebely
(D) All of the above.

Q17. In aerodynamic terminology, a “positive pressure” generally indicates a value that is:
(A) Greater than atmospheric pressure
(B) Greater than zero bar
(C) Greater than zero Pascal

Q18. static fluid (fluid at rest), which of the following is true?
(A) Only normal stresses exist.
(B) Fluid pressure drops to exactly zero.
(C) viscosity drops to nil.

Q19. If an aerofoil is tilted downward to an angle of attack that produces exactly zero lift, its aerodynamic behavior is conceptually similar to a:
(A) Flat plate kept parallel (edge-on) to the oncoming airflow
(B) Sphere/ball placed in the airflow
(C) Cylindrical rod placed perpendicular to the airflow
(D) None of the above

Q20. AIR has??
(A) viscosity
(B) Zero viscosity
(C) Negative viscosity

Q21. The internal stress state produced by structural bending consists primarily of a combination of:
(A) Compression and tension
(B) Compression, , and torsional
(C) Compression and shear

Q22. Standard atmospheric pressure at sea level is 14.7 PSI. This value is equivalent to:
(A) 101.3 mb
(B) 10.13 mb
(C) 1013 mb
(D) 1013 mb

Q23. In TROPOSPHERE ?
(A) Both pressure and temperature steadily decrease. AS altitude increase
(B) Both pressure and temperature increase. AS altitude increase
(C) Only pressure increases a s altitude increase .
(D) Only TEMP. increases a s altitude increase

Q23. During a steep turn
A) High speed only
B) High speed and low angle of attack
C) High speed and high angle of attack perhaps to stalling angle

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