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Determine the corrections or otherwise of the following assertion and reason : Assertion : Maintaining smooth longitudinal contour in fuselage will give better aerodynamic design. Reason: Longitudinal control lines are used to provide smoothness to the fuselage. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) Both and are false d) is false but is true

Correct Answer: A
A good aerodynamic design of a fuselage will maintain smooth longitudinal contour to reduce the drag and other similar effects. This can be achieved by using longitudinal control lines. Smooth fuselage with lesser discontinuity will reduce the drag and as a result of which aerodynamic efficiency will improve. Hence, and both correct however, is not correct reason.

Determine the corrections or otherwise of the following assertion and reason : Assertion : Typically control surface are tapered with same taper ratio as primary component such as wing or tail Reason: Control surface is used to provide trim control to the A/C and are true and is the correct reason for b) Both and are true but is not the correct reason for c) Both and are false d) is false but is true

Determine the corrections or otherwise of the following assertion and reason : Assertion : Fuel consumption is more for low level, high speed flight mission. Reason: At low altitude, the aerodynamic efficiency decreases drastically which affects the engine efficiency and range as well. To maintain cruise flight more fuel consumption is required. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) is true but is false d) is false but is true

Determine the corrections or otherwise of the following assertion and reason : Assertion : Most of the tails are using symmetric airfoils. Reason: Tail control has two primary control surface. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) is true but is false d) is false but is true

Determine the corrections or otherwise of the following Assertion and Reason : Assertion : For longitudinal static stability of an aircraft, slope of moment curve should be negative. Reason: Positive slope will result in more static stability than negative slope. Hence, slope should be positive always. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) is true but is false d) is false but is true

Determine the corrections or otherwise of the following assertion and reason : Assertion : In general, wing twist should not be more than 6°. Reason: Wing twist is used to improve stall properties at tip. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) is true but is false d) is false but is true

Determine the corrections or otherwise of the following Assertion and reason : Assertion : Total fuel volume of aircraft is divided into mission or used fuel, reserve fuel and trapped fuel. Reason: Depending on type of aircraft, fuel fraction for each category will be different. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) is true but is false d) is false but is true

Determine the corrections or otherwise of the following assertion and reason : Assertion : In modern A/C, we generally do not use spline lofting. Reason: Spline lofting is drawn through connecting different known points via spline line. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) Both and are false d) is false but is true

Determine the corrections or otherwise of the following assertion and reason : Assertion : Taper ratio will affect the weight of wing. Reason: For finite taper ratio, wing thickness will be different at root and tip. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) is true but is false d) is false but is true

Determine the corrections or otherwise of the following assertion and reason : Assertion : Flying boats have higher values of empty weight fraction than that of the military aircraft. Reason: Military aircraft has to be lighter in weight. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) is true but is false d) is false but is true

Determine the corrections or otherwise of the following assertion and reason : Assertion : Most of the airfoils are built with blunt trailing edge having very small finite thickness. Reason: Perfect sharp trailing edge is difficult to build. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) is true but is false d) is false but is true