Aerodynamics - Parasite (Zero-Lift) Drag and Drag due to Lift Online Exam Quiz
Aerodynamics - Parasite (Zero-Lift) Drag and Drag due to Lift GK Quiz. Question and Answers related to Aerodynamics - Parasite (Zero-Lift) Drag and Drag due to Lift. MCQ (Multiple Choice Questions with answers about Aerodynamics - Parasite (Zero-Lift) Drag and Drag due to Lift
Consider equivalent skin friction coefficient as 0.0025 and Swet/Sref = 0.6. Evaluate parasite drag.
Options
A : 0.0015
B : 2.34
C : 1.23
D : 0.000025
Determine Flat plate skin friction coefficient if Reynolds number is 123500. Consider flow to be laminar.
Options
A : 0.0038
B : 1.234
C : 0.045
D : 123500
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.
Options
A : 0.0032
B : 1.2
C : 4.2
D : 0.04
Determine the value of form factor for fuselage if fuselage fineness ratio f is 1.2.
Options
A : 35.725
B : 12
C : 100
D : 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.
Options
A : 18.67 unit
B : 12 unit
C : 20 unit
D : 65 unit
Flat plate skin friction coefficient depends upon ___
Options
A : mach number only
B : reynolds number only
C : mach number, reynolds number etc
D : weight of the aircraft
Ratio of vertical distance travelled to the horizontal distance travelled is known as __
Options
A : climb gradient
B : lift curve slope
C : power required
D : thrust loss
What do you mean by rate of climb?
Options
A : Vertical velocity of an aircraft
B : Lift of an aircraft
C : Thrust required
D : Drag polar
Which of the following is correct for nacelle form factor (FF)?
Options
A : FF = 1+(0.35/f)
B : FF = 1*(0.35/f)
C : FF = 1-(0.35/f)
D : FF = 1/(0.35/f)
Which of the following is correct in terms of fate of climb (R/C)?
Options
A : R/C = excess power/weight
B : R/C = lift/drag
C : R/C = excess lift/drag
D : R/C = excess power/Thrust required