Q.1
What is creep?
  • a) Under low sustained stress, it is tendency of some materials to get deform slowly and permanently
  • b) Under zero stress, it is permanent deformation
  • c) High lift device
  • d) Anti ice device
Q.2
Which of the following is correct?
  • a) Corrosion is major problem in terms of material lifespan
  • b) Corrosion cannot be considered as major factor at all
  • c) Lift on corrosive material will always be same as weight
  • d) Weight of corrosive material will always be same as thrust loading
Q.3
Let us consider the ambient air temperature is 25°C and aircraft has Mach number of 1.Find the stagnation temperature.
  • a) 432.32K
  • b) 789K
  • c) 123.56K
  • d) 213.458K
Q.4
What is the advantage of wood?
  • a) Easy to fabricate
  • b) Moisture sensitivity
  • c) Complexity during fabrication
  • d) Non availability
Q.5
Which of the following is correct?
  • a) Wood sufferers from moisture sensitivity
  • b) Wood is not available, it is rare to find
  • c) Lift of wooden box will be same as drag
  • d) Wood surface is not sensitive to moisture at all
Q.6
For high strength applications ____ is widely used.
  • a) 7075 aluminum alloy
  • b) 7089 magnesium zinc
  • c) 1098 gallium
  • d) Ge-Zn alloy
Q.7
Magnesium is used for ________
  • a) control hinges
  • b) highest strength application
  • c) lofting
  • d) drafting
Q.8
Following diagram represents _________
Questionaircraft-design-questions-answers8.jpg
  • a) whisker reinforced composite
  • b) matrix only
  • c) fiber only
  • d) aluminum alloy
Q.9
Following diagram represents _________
Questionaircraft-design-questions-answers9.jpg
  • a) fiber reinforced polymer
  • b) fiber reinforced nitrate only
  • c) matrix arrangement only
  • d) magnesium arrangement
Q.10
Whiskers are ________
  • a) isotropic
  • b) isothermal
  • c) isobaric
  • d) isentropic compression
Q.11
Composite material has only one material.
  • a) True
  • b) False
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