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Quiz 1
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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 _________
a) whisker reinforced composite
b) matrix only
c) fiber only
d) aluminum alloy
Q.9
Following diagram represents _________
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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