Aerodynamics MCQ

Test your knowledge with important Aerodynamics MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Aerodynamics MCQs at Bissoy

• Which of the following is correct for nacelle form factor (FF)?
  ক

  FF = 1+(0.35/f)

  খ

  FF = 1*(0.35/f)

  গ

  FF = 1-(0.35/f)

  ঘ

  FF = 1/(0.35/f)
• Determine Flat plate skin friction coefficient if Reynolds number is 123500. Consider flow to be laminar.
  ক

  0.0038

  খ

  1.234

  গ

  0.045

  ঘ

  123500
• Flat plate skin friction coefficient depends upon _____________
  ক

  mach number only

  খ

  reynolds number only

  গ

  mach number, reynolds number etc

  ঘ

  weight of the aircraft
• Determine the value of form factor for fuselage if fuselage fineness ratio f is 1.2.
  ক

  35.725

  খ

  12

  গ

  100

  ঘ

  423.2
• Find the approximate value of wetted area Swet for given reference area of Sref=20 unit and parasite drag coefficient of 0.0028. Consider equivalent skin friction coefficient Cf as 0.003.
  ক

  18.67 unit

  খ

  12 unit

  গ

  20 unit

  ঘ

  65 unit
• Consider equivalent skin friction coefficient as 0.0025 and Swet/Sref = 0.6. Evaluate parasite drag.
  ক

  0.0015

  খ

  02.34

  গ

  1.23

  ঘ

  0.000025
• Determine the initial estimation of parasite drag coefficient if, equivalent skin friction coefficient is 0.004 and ratio of wetted area to the reference area is 0.8.
  ক

  0.0032

  খ

  1.2

  গ

  4.2

  ঘ

  0.04
• To get initial estimation of the parasite drag, aircraft wetted area can be multiplied by _____
  ক

  equivalent skin friction coefficient

  খ

  weight

  গ

  lift

  ঘ

  wing span
• Equivalent skin friction coefficient may include ______________
  ক

  skin friction and separation drag

  খ

  only wave drag

  গ

  only skin friction drag

  ঘ

  only thrust loading
• Equivalent skin friction coefficient can be used to provide initial estimation of the parasite drag.
  ক

  True

  খ

  False
• Which of the following is a method for estimating the potato drag?
  ক

  Equivalent skin friction method

  খ

  Mach number

  গ

  Weight only

  ঘ

  Conceptual design
• A subsonic aircraft has unswept wing which has maximum lift coefficient of 1.4. Now, consider wing is provided sweep of 25° at quarter chord point. Now, determine the change in maximum lift coefficient due to the provision of sweep.
  ক

  Maximum Lift coefficient will be reduced by 0.2580 amount

  খ

  Increment by 1.245

  গ

  Decreases by 0.0476 amount

  ঘ

  Maximum lift coefficient will increase by 56%
• A subsonic aircraft wing has aspect ratio of 8. Now we have been asked to provide winglet to this wing. Evaluate approximate value of effective aspect ratio of winglet is considered.
  ক

  9.6

  খ

  23

  গ

  32

  ঘ

  4.89
• If an airfoil is designed to provide lift curve slope as 7.8, then find airfoil efficiency. The actual lift curve slope of the airfoil is 7.4.
  ক

  94.87%

  খ

  45%

  গ

  15.6%

  ঘ

  98.7%
• A supersonic 2D airfoil has Mach number of 1.5. Find Lift curve slope of the airfoil.
  ক

  0.062 per degree

  খ

  0.062 per rad

  গ

  24 per degree

  ঘ

  12.56 per degree
• A 2D airfoil is operating at 0.6M. Find the approximate value of lift curve slope in per rad.
  ক

  7.85

  খ

  1.9

  গ

  2.3

  ঘ

  3.87
• At same value of maximum lift AOA, lift coefficient of Cambered wing is _________
  ক

  higher than uncambered wing

  খ

  lower than uncambered wing

  গ

  same as cambered airfoil always

  ঘ

  not dependent on camber
• 2H2 + O2 → 2H2O is an elementary chemical reaction.
  ক

  True

  খ

  False
• Which of these reactions is not carried out for the formation of nitric oxide?
  ক

  Dissociation reaction of oxygen molecule

  খ

  Dissociation reaction of nitrogen molecule

  গ

  Shuffle reaction of nitric oxide molecule

  ঘ

  Dissociative – recombination reaction of nitrogen and oxygen
• In case of translation-vibration transfers, there can be an increase or decrease in kinetic energy.
  ক

  True

  খ

  False
• What does the product of collision frequency and transition probability yield?
  ক

  Number of transitions per particle per second

  খ

  Number of collisions per second

  গ

  Number of collisions per second per particle

  ঘ

  Transitions per collision
• What is the value of transition probability?
  ক

  0

  খ

  More than 1

  গ

  Less than 1

  ঘ

  1
• For which condition is collision theory low?
  ক

  Low temperature and pressure

  খ

  High temperature and pressure

  গ

  Low temperature, high pressure

  ঘ

  High temperature, low pressure
• Time taken for the number of collisions depends on which of these parameters?
  ক

  Molecular collision frequency

  খ

  Molar density

  গ

  Number of moles

  ঘ

  Boltzmann constant
• Which of these parameters affect the number of collisions?
  ক

  Pressure of the setup

  খ

  Kinetic energy between the molecules

  গ

  Density of the apparatus

  ঘ

  Temperature of the apparatus
• The chemical and vibrational process occur due to molecular collision.
  ক

  True

  খ

  False
• What happens to a reaction when reaction quotient is equal to the equilibrium constant?
  ক

  Forward reaction

  খ

  Equilibrium

  গ

  Reverse reaction

  ঘ

  No change
• What is chemical equilibrium?
  ক

  Change in temperature spontaneously

  খ

  No change in chemical composition spontaneously

  গ

  Change in pressure

  ঘ

  Equilibrium between mole fractions
• What is Dalton’s law?
  ক

  Total temperature is equal to sum of partial temperatures

  খ

  Total entropy is equal to sum of partial entropies

  গ

  Total pressure is equal to sum of partial pressures

  ঘ

  Total number of moles is equal to sum of mole fractions
• Which of these methods is not used in describing the composition of air which is at a chemical equilibrium?
  ক

  Partial pressure

  খ

  Partial temperature

  গ

  Mass fraction

  ঘ

  Mole – mass ratio