Choose the correct answers 14.An all moving tailplane is used in preference to elevators on high speed aircraft:because the effect of the elevator is reversed above the critical Mach number.because shock wave formation on the elevator causes excessive stick forces.a.b.because shock wave formation ahead of the elevator causes separation andC.loss of elevator effectiveness.d.because it would be physically impossible for a pilot to control the aircraft inpitch with a conventional tailplane and elevator configuration.15. Mach Trim is a device which:moves the centre of gravity to maintain stable lateral stick forces in thetransonic region.automatically compensates for pitch changes while flying in the transonicspeed region.prevents the aircraft from exceeding its critical Mach number.switches out the trim control to prevent damage in the transonic region.a.b.C.d.16. What is the movement of the centre of pressure when the wing tips of asweptwing aeroplane are shock stalled first?a.b.Outward and forward.Inward and aft.Outward and aft.C.d.Inward and forward.17.The airflow behind a normal shock wave will:always be subsonic and in the same direction as the original airflow.always be supersonic and in the same direction as the original airflow.may be subsonic or supersonic.always be subsonic and will be deflected from the direction of the originalairflow.a.b.c.d.18.As airflow passes through a normal shock wave, which of the following changes instatic pressure (i), density (ii), and Mach number (iii) will occur?(ii)< 1.0< 1.0> 1.0 or < 1.0< 1.0(i)decrease(ii)increa sedecrea sea.b.C.d.increaseincreasedecrea seincreaseincrea seAn aerofoil travelling at supersonic speed will:19.have its centre of pressure at 50 % chord.have its centre of pressure at 25% chord.give a larger proportion of lift from the lower surface than from theupper surface, and have its centre of pressure at 50 % chord.give approximately equal lift from the upper and lower surfaces, andhave its aerodynamic centre at 50% chord.ab.C.d.

Answered: Image /qna-images/answer/ee49da3e-ff08-4960-b647-93a76b9cdefa.jpg

14. An all moving tailplane is used in preference to elevators on high speed aircraft: because the effect of the elevator is reversed above the critical Mach number. because shock wave formation on the elevator causes excessive stick forces. a. b because shock wave formation ahead of the elevator causes separation and loss of elevator effectiveness. C. d. because it would be physically impossible for a pilot to control the aircraft in pitch with a conventional tailplane and elevator configuration. 15. Mach Trim is a device which: moves the centre of gravity to maintain stable lateral stick forces in the transonic region. automatically compensates for pitch changes while flying in the transonic speed region. prevents the aircraft from exceeding its critical Mach number. a. b. C. d. switches out the trim control to prevent damage in the transonic region. 16. What is the moement of the centre of pressure when the wing tips of a sweptwing aeroplane are shock stalled first? a. Outward and forward. b с. d. Inward and aft. Outward and aft. Inward and forward.

14. An all moving tailplane is used in preference to elevators on high speed aircraft: because the effect of the elevator is reversed above the critical Mach number. because shock wave formation on the elevator causes excessive stick forces. a. b because shock wave formation ahead of the elevator causes separation and loss of elevator effectiveness. C. d. because it would be physically impossible for a pilot to control the aircraft in pitch with a conventional tailplane and elevator configuration. 15. Mach Trim is a device which: moves the centre of gravity to maintain stable lateral stick forces in the transonic region. automatically compensates for pitch changes while flying in the transonic speed region. prevents the aircraft from exceeding its critical Mach number. a. b. C. d. switches out the trim control to prevent damage in the transonic region. 16. What is the moement of the centre of pressure when the wing tips of a sweptwing aeroplane are shock stalled first? a. Outward and forward. b с. d. Inward and aft. Outward and aft. Inward and forward.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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