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1) Total energy of an aircraft is defined as ____________ a. sum of the potential and kinetic energy b. total kinetic energy only c. total potential energy only d. product of kinetic and potential energy
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2) Total energy divided by the aircraft weight is term as ____________ a. Specific energy b. KE c. PE d. Total energy
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3) If Total energy of an aircraft is found to be 1200 unit and kinetic energy is 1100 unit then, determine the potential energy. a. 100 unit b. 213 unit c. 456 unit d. 500 unit
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4) Find the total energy of an aircraft if kinetic energy and potential energy are 3600 and 1200 units respectively. a. 4800 unit b. 2800 unit c. 1234 unit d. 5789 unit
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5) If sum of potential and kinetic energy of an aircraft is 5000 unit and aircraft weighs around 1200 unit then, determine specific total energy. a. 4.16 unit b. 2.89 unit c. 40 d. 10.8
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6) Unit of specific energy is __________ a. meter b. meter per second c. unit less d. newton
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7) If my aircraft has access power off 520 KW and it weighs around 1200 N then, determine the value of specific excess power. a. 433.33 m/s b. 123.88 ft. s c. 119 d. 345.768m/s
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8) Find the approximate value of time required to change energy height. Consider change in energy height is 250m and specific power for the operation is 100m/s. a. 2.5s b. 4.5min c. 2.5hr d. 2.59min
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9) If a Maneuver requires specific power of 1200 unit then, find the approximate value of fuel specific energy. Given thrust as 1000 unit and tsfc of 0.00042 unit. a. 2857.14 unit b. 1568.45 unit c. 4500 unit d. 6789 unit
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10) The level flight envelope is determined by ________ a. stall limit lines and from zero specific power b. wing aileron size c. spoilers area d. tail area
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11) The highest altitude where Ps is zero is called ________ a. absolute ceiling b. drag polar c. geometric height d. geometric altitude
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12) Which of the following is incorrect? a. Operating envelope will give same values for all the aircraft b. Load factor at cruise is unity c. Lift is same as weight during cruise d. Wing loading is not same as thrust
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13) Operating envelope is also known as ________ a. flight envelope b. fly by wire c. stall speed diagram d. lift curve
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14) If static pressure of flow is 1200psf and operating Mach number is 1.19 then, determine the external flow dynamic pressure. a. 1189.52 psf b. 12.89 psf c. 112 psf d. 2587 psf
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15) Determine static pressure if external flow dynamic pressure is 1800psf and flow has Mach number of 2. a. 642.857psf b. 1000psf c. 2400 psf d. 4673 psf
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16) Consider external flow dynamic pressure as 2000psf and static pressure as 800psf. find the approximate value of Mach number. a. 1.9 b. 5 c. 4.5 d. 2.78
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17) Determine total pressure if static pressure is 1600psf and Mach number is 1.8. Consider flow of air. a. 9193.2 psf b. 1000 psf c. 3450 psf d. 7892 psf
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18) If flow has Mach number of 1.2 then, determine the ratio of total and external flow dynamic pressure. a. 2.4 b. 1 c. 3.8 d. 5.6
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19) Which of the following is not part of takeoff? a. Ground roll b. Transition c. Climb d. Descending
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20) Determine the acceleration of an aircraft which is in ground roll segment. Consider weight of the aircraft as 150kN, thrust as 110kN and drag as 10kN. Assume weight on the wheels as 60kN and rolling friction as 0.05. a. 5.68 m/s2 b. 100kN c. 100 m d. 3.5689 Kg*m/s
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21) If stall speed of the aircraft is 10m/s then, find the approximate value of takeoff speed. a. 11m/s b. 1m/s c. 9m/s d. 7m/s
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22) If our design has takeoff velocity of 120 knots then, at which value of stall speed we should design our aircraft? a. 109.08knots b. 110 knots c. 150 knots d. 125 knots
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23) Find liftoff distance for an aircraft which has weight of 20kN and thrust of 8kN. Consider thrust is much larger than drag and friction parameters. Consider maximum lift coefficient of 1.1, reference area of 12m2 and sea-level density. a. 454m b. 1000m c. 12m d. 12.12m
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24) Find the average velocity at transition if, stall speed is 15 unit. a. 17.25 unit b. 19 unit c. 30 unit d. 45 unit
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25) If climb speed during takeoff is 120 unit then, find stall speed. a. 100knots b. 240knots c. 1267knots d. 215knots
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26) If Stall speed is 140fps then, find approximate radius of transition arc. a. 4018 feet b. 5015 km c. 1m d. 10cm
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27) Find the horizontal distance travelled during transition segment. Consider radius of transition arc is 2km and thrust loading is 0.6 and L/D is 5. a. 800m b. 8000m c. 80m d. 0.80m
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28) Find the approach speed if, stall speed is 12 unit. a. 15.6 unit b. 12 unit c. 10 unit d. 1 unit
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29) Find the approach speed for military aircraft. Considered stall speed is 22unit. a. 26.4 unit b. 20 m c. 12 ft d. 45 unit
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30) Find the required amount of touchdown speed if stall speed is 100knots. a. 115 knot b. 120 knot c. 100 knot d. 99.2 knot
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31) If stall speed is 120 knots then, find average velocity at flare. a. 147.6 b. 120 c. 110 d. 567
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32) For military aircraft touchdown speed is 100 knots then, approximate value of stall speed. a. 90.90 b. 100 c. 200 d. 223
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33) Find the required average velocity during flare for military aircraft if stall speed is 45 unit. a. 51.75 unit b. 60 unit c. 45 unit d. 100 unit
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34) Determine the value of FAR field length. Consider approach of 100 ft., flare of 120 feet and ground roll of 600ft. a. 1366.12 b. 109 c. 600 d. 700
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35) Final velocity at the end of the landing phase will be ____________ a. zero b. same as Approach speed c. touchdown speed d. same as climb rate
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36) Which of the following is correct? a. Aircraft decelerates from Approach to Touchdown speed during flare b. Lift is always same as weight c. Drag is always same as Thrust d. Thrust loading is defined as the ratio of lift to drag
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