# 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