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introduction to aerospace engineering question paper for mechanical engineers, Papers of Introduction to Aerospace Engineering

introduction to aerospace engineering question paper for mechanical engineers

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USN No:
III / VII Semester B. Tech Examinations December 2020 / January 2021
Course Title: Introduction to Aerospace Engineering / Course Code: 19AS2301 /
Fundamentals of Aerospace Engineering 16IE469
Duration: 03 Hours Date: 30-12-2020
Time: 10:00 AM to 01:00 PM Max Marks: 100
Note: 1. ALL SECTIONS ARE COMPULSORY
2. Each Section carries 20 Marks
3. Draw neat sketches wherever necessary
4. Missing Data may be suitably assumed
SECTION 1
1.a.
Describe the features of Troposphere, Tropopause and Stratosphere in the
atmosphere. Draw a sketch showing the variation of temperature from sea
level to Stratosphere as per ISA and indicate the respective temperatures.
(06 Marks)
1.b.
If an aircraft flies at Mach 1 at sea level, what would be its speed at an
altitude of 11 kM at the same Mach number?
(06 Marks)
1.c.
Draw neat sketches of typical symmetric and asymmetric airfoils and their
respective CL-Alpha curves. Describe “Stall” of an airfoil based on neat
sketches.
(08 Marks)
SECTION 2
2.a.
Draw neat sketch of an aircraft and name the major components and
control surfaces. Describe how trim tabs are useful on control surfaces.
(08 Marks)
2.b.
If aircraft with a wing area of 20 sq. m flies at 200 Knots at sea level and
generates a lift force of 15000N, what are its Mach number and Lift
Coefficient?
(06 Marks)
2.c.
What are the differences between Center of Pressure and Aerodynamic
Center of an airfoil?
(03 Marks)
2.d
What are the advantages and disadvantages of solid and liquid rocket
propellants?
(03 Marks)
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Page 1 of 2

USN No:

III / VII Semester B. Tech Examinations – December 2020 / January 2021

Course Title: Introduction to Aerospace Engineering / Course Code: 19AS2301 /

Fundamentals of Aerospace Engineering 16IE

Duration : 03 Hours Date: 30-12-

Time: 10:00 AM to 01:00 PM Max Marks: 100

Note: 1. ALL SECTIONS ARE COMPULSORY

**2. Each Section carries 20 Marks

  1. Draw neat sketches wherever necessary
  2. Missing Data may be suitably assumed** SECTION – 1 1.a. Describe the features of Troposphere, Tropopause and Stratosphere in the atmosphere. Draw a sketch showing the variation of temperature from sea level to Stratosphere as per ISA and indicate the respective temperatures. (06 Marks) 1.b. If an aircraft flies at Mach 1 at sea level, what would be its speed at an altitude of 11 kM at the same Mach number? ( 06 Marks) 1 .c. Draw neat sketches of typical symmetric and asymmetric airfoils and their respective CL-Alpha curves. Describe “Stall” of an airfoil based on neat sketches. (08 Marks) SECTION – 2 2 .a. Draw neat sketch of an aircraft and name the major components and control surfaces. Describe how trim tabs are useful on control surfaces. (08 Marks) 2 .b. If aircraft with a wing area of 20 sq. m flies at 200 Knots at sea level and generates a lift force of 15000N, what are its Mach number and Lift Coefficient? (06 Marks) 2 .c. What are the differences between Center of Pressure and Aerodynamic Center of an airfoil? (03 Marks) 2.d What are the advantages and disadvantages of solid and liquid rocket propellants? (03 Marks)

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SECTION – 3

3 .a. Write down the three Kepler’s laws of planetary motion. Write a neat sketch to describe the perigee and apogee of a satellite orbiting the earth? (08 Marks) 3 .b. Describe^ a^ geostationary^ satellite^ and^ its^ features.^ What^ are^ the advantages of such a satellite? (06 Marks) 3.c. For a planet at a 1 AU from the sun, what would be its orbital period? (04 Marks) 3 .d. What are the differences between a Torpedo and a Missile? (02 Marks) SECTION – 4 4 .a. Draw a neat sketch of a jet-engine, name the components and explain their functionality. (08 Marks) 4 .b. Draw P-V and T-S diagrams of Brayton Cycle and describe the various events in the Cycle. Describe how is the thermal efficiency of a jet engine determined. (06 Marks) 4.c. Explain the terms Regeneration, Inter-cooling and Re-heat in a Brayton Cycle and explain with respect to the corresponding T-S diagrams. (06 Marks) SECTION – 5 5 .a. What are the pitot-static based and gyro-based instruments used in an aircraft. Describe what happens in flight if the static pressure port of an aircraft is clogged? ( 08 Marks) 5 .b. Explain the meanings of Truss, Monocoque and Semi-monocoque type of structures and where they are used. Why are composite materials preferred over metals in aerospace engineering? (06 Marks) 5.c. What are the major hydraulic, pneumatic and electrical systems in an aircraft and describe their functionality based on block diagrams? (06 Marks)