PTU B.Tech Automobile Engineering? 6th Semester May 2019 71220 AUTOMOTIVE AERODYNAMICS Question Papers

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Total No. of Pages : 02

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Roll No.

Total No. of Questions : 09

B.Tech.(AE) (2011 Onwards) (Sem.-6)

AUTOMOTIVE AERODYNAMICS

Subject Code : BTAE-604

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M.Code: 71220

Time: 3 Hrs.

Max. Marks : 60

INSTRUCTION TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.

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2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.

SECTION-A

1. Answer briefly :
   1. What do you mean by laminar flow?
   2. What do you mean by wage reason

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   3. What are different modes to cool the engine?
   4. Does the shape of a Vehicle effect the efficiency?
   5. What is the use of fasteners?
   6. What is the range for rear wind shield angle?
   7. Write the ways used to eliminate or reduce the vehicle wind noise.

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   8. Draw the stability diagram showing all the moments of the vehicle taking a turn on a banking curved road. Also consider the side wind effect.
   9. What is the main limitation of simulation?
   10. What do you mean by scaled models?

SECTION-B

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2. Describe the process of cooling of transverse and rear engine.
3. Explain the car as a bluff body also discuss the different types of drag forces on it.
4. Explain the effect of dirt accumulation on the vehicle.
5. Write a short on Fast Back and Square Back.
6. Explain the different measurement techniques used in wind tunnel and also describe the equipments used for it.

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7. With the help of a suitable example, explain the stress calculation for a full-scale wind tunnel model. Also mention the equipments and transducers used for the same.
8. Explain with a neat sketch, how front-end modification helps the vehicle to reduce the drag. Also explain the dust flow pattern at the rear of a vehicle.
9. Explain the following terms in detail
   1. Bluff body
   2. Low drag profile
   3. Drag coefficient

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NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.

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