Structures and Design Conceptual Questions
(Mock Exams) With Correct Answers
Low /induced /drag /can /be /obtained /by /using:
a. /High /wing /aspect /ratio
b. /Low /wing /aspect /ratio
c. /Constant /wing /chord
d. /Constant /wing /area /- /verified /answer(s)-✔✔A
Rate /of /descent /can /be /minimized /when:
a. /Parasite /drag /equals /induced /drag
b. /Parasite /drag /equals /one-third /induced /drag
c. /Parasite /drag /equals /there /times /the /induced /drag
d. /Parasite /drag /is /greater /than /the /induced /drag /- /verified /answer(s)-✔✔B
Which /is /not /one /of /the /characteristics /of /a /high /wing /arrangement?
a. /Has /minimum /interference /drag
b. /Allows /a /continuous /structural /path /for /the /wing /spar /box
c. /Provides /for /a /good /downward /visibility
d. /Offers /highest /aerodynamic /efficiency /- /verified /answer(s)-✔✔A
If /the /aircraft /is /operated /in /steady /flight /at /maximum /lift/drag /ratio, /the /total /drag
a. /equals /three /times /the /induced /drag
b. /equals /four /times /the /parasite /drag
,c. /equal /two /times /the /parasite /drag
d. /equals /induced /drag /- /verified /answer(s)-✔✔C
The /angle /of /attack /of /a /two /dimensional /wing /section /is /the /angle /between:
a. /the /fuselage /core /line /and /the /free /stream /direction
b. /the /chord /line /and /the /camber /line /of /the /airfoil
c. /the /chord /line /of /the /airfoil /and /the /free /stream /direction
d. /the /chord /line /of /the /airfoil /and /the /fuselage /center /line /- /verified /answer(s)-✔✔C
The /power /available /is /obtained /by
a. /multiplying /the /drag /by /the /airspeed
b. /dividing /the /drag /by /the /airspeed
c. /multiplying /the /brake /horsepower /by /the /propeller /efficiency
d. /dividing /the /brake /horsepower /by /the /propeller /efficiency /- /verified /answer(s)-✔✔C
The /speed /for /best /climb /angle /is /called:
a. /Vo
b. /VY
c. /VX
d. /V2 /- /verified /answer(s)-✔✔C
The /major /items /considered /by /the /designer /may /be /summarized /as /follows:
1. /Load /required /to /be /carried
2. /Performance /and /other /aerodynamic /requirements
3. /Type /of /material, /structural /and /general /arrangement
4. /Weight
,5. /Powerplant
For /the /items /enumerated /above, /which /item /or /items /cause /the /most /trouble /to /designer?
a. /1 /and /3
b. /2 /and /4
c. /5
d.4 /- /verified /answer(s)-✔✔D
What /are /the /four /basic /forms /of /deformation /of /solid /bodies?
a. /Tension, /compression, /bending /and /twisting
b. /Tension, /compression, /elongation /and /bending
c. /Tension, /compression, /plastic /and /elastic
d. /Tension, /compression, /elongation /and /torsion /- /verified /answer(s)-✔✔A
What /is /the /ratio /of /the /transverse /strain /to /the /corresponding /axial /strain /in /a /body
/subjected /to /uniaxial /stress?
a. /Poisson's /Ratio
b. /Euler's /Ratio
c. /Refractive /Index
d. /Dielectric /Index /- /verified /answer(s)-✔✔A
What /is /a /structural /member /supported /horizontally /and /carries /transverse /loading?
A. /Beam
B. /Column
c. /Arch
d. /Shaft /- /verified /answer(s)-✔✔A
, Volumetric /strain /is /the:
a. /change /in /volume /per /unit /time
b. /square /root /of /the /difference /of /the /original /volume /and /change /in /volume
c. /original /volume /minus /change /in /volume
d. /ratio /of /change /in /volume /to /the /original /volume /- /verified /answer(s)-✔✔D
Within /the /elastic /limit, /the /shear /stress /is /proportional /to /shear /strain. /What /is /the /constant
/of /proportionality /of /this /statement /called?
a. /Modulus /of /rigidity
b. /Modulus /of /Elasticity
c. /Young's /modulus
d. /Bulk /modulus /- /verified /answer(s)-✔✔A
The /ratio /of /moment /of /inertia /of /a /circular /plate /and /that /of /a /square /plate /for /equal /depth,
/is
a. /equal /to /3π/16
b. /more /than /one
c. /less /than /one
d. /equal /to /one /- /verified /answer(s)-✔✔A
An /isolated /drawing /of /a /particle /which /shows /all /forces /that /act /on /it
a. /Shear /and /bending /moment /diagram
b. /Free-body /diagram
c. /Method /of /section
d. /Method /of /joints /- /verified /answer(s)-✔✔B
(Mock Exams) With Correct Answers
Low /induced /drag /can /be /obtained /by /using:
a. /High /wing /aspect /ratio
b. /Low /wing /aspect /ratio
c. /Constant /wing /chord
d. /Constant /wing /area /- /verified /answer(s)-✔✔A
Rate /of /descent /can /be /minimized /when:
a. /Parasite /drag /equals /induced /drag
b. /Parasite /drag /equals /one-third /induced /drag
c. /Parasite /drag /equals /there /times /the /induced /drag
d. /Parasite /drag /is /greater /than /the /induced /drag /- /verified /answer(s)-✔✔B
Which /is /not /one /of /the /characteristics /of /a /high /wing /arrangement?
a. /Has /minimum /interference /drag
b. /Allows /a /continuous /structural /path /for /the /wing /spar /box
c. /Provides /for /a /good /downward /visibility
d. /Offers /highest /aerodynamic /efficiency /- /verified /answer(s)-✔✔A
If /the /aircraft /is /operated /in /steady /flight /at /maximum /lift/drag /ratio, /the /total /drag
a. /equals /three /times /the /induced /drag
b. /equals /four /times /the /parasite /drag
,c. /equal /two /times /the /parasite /drag
d. /equals /induced /drag /- /verified /answer(s)-✔✔C
The /angle /of /attack /of /a /two /dimensional /wing /section /is /the /angle /between:
a. /the /fuselage /core /line /and /the /free /stream /direction
b. /the /chord /line /and /the /camber /line /of /the /airfoil
c. /the /chord /line /of /the /airfoil /and /the /free /stream /direction
d. /the /chord /line /of /the /airfoil /and /the /fuselage /center /line /- /verified /answer(s)-✔✔C
The /power /available /is /obtained /by
a. /multiplying /the /drag /by /the /airspeed
b. /dividing /the /drag /by /the /airspeed
c. /multiplying /the /brake /horsepower /by /the /propeller /efficiency
d. /dividing /the /brake /horsepower /by /the /propeller /efficiency /- /verified /answer(s)-✔✔C
The /speed /for /best /climb /angle /is /called:
a. /Vo
b. /VY
c. /VX
d. /V2 /- /verified /answer(s)-✔✔C
The /major /items /considered /by /the /designer /may /be /summarized /as /follows:
1. /Load /required /to /be /carried
2. /Performance /and /other /aerodynamic /requirements
3. /Type /of /material, /structural /and /general /arrangement
4. /Weight
,5. /Powerplant
For /the /items /enumerated /above, /which /item /or /items /cause /the /most /trouble /to /designer?
a. /1 /and /3
b. /2 /and /4
c. /5
d.4 /- /verified /answer(s)-✔✔D
What /are /the /four /basic /forms /of /deformation /of /solid /bodies?
a. /Tension, /compression, /bending /and /twisting
b. /Tension, /compression, /elongation /and /bending
c. /Tension, /compression, /plastic /and /elastic
d. /Tension, /compression, /elongation /and /torsion /- /verified /answer(s)-✔✔A
What /is /the /ratio /of /the /transverse /strain /to /the /corresponding /axial /strain /in /a /body
/subjected /to /uniaxial /stress?
a. /Poisson's /Ratio
b. /Euler's /Ratio
c. /Refractive /Index
d. /Dielectric /Index /- /verified /answer(s)-✔✔A
What /is /a /structural /member /supported /horizontally /and /carries /transverse /loading?
A. /Beam
B. /Column
c. /Arch
d. /Shaft /- /verified /answer(s)-✔✔A
, Volumetric /strain /is /the:
a. /change /in /volume /per /unit /time
b. /square /root /of /the /difference /of /the /original /volume /and /change /in /volume
c. /original /volume /minus /change /in /volume
d. /ratio /of /change /in /volume /to /the /original /volume /- /verified /answer(s)-✔✔D
Within /the /elastic /limit, /the /shear /stress /is /proportional /to /shear /strain. /What /is /the /constant
/of /proportionality /of /this /statement /called?
a. /Modulus /of /rigidity
b. /Modulus /of /Elasticity
c. /Young's /modulus
d. /Bulk /modulus /- /verified /answer(s)-✔✔A
The /ratio /of /moment /of /inertia /of /a /circular /plate /and /that /of /a /square /plate /for /equal /depth,
/is
a. /equal /to /3π/16
b. /more /than /one
c. /less /than /one
d. /equal /to /one /- /verified /answer(s)-✔✔A
An /isolated /drawing /of /a /particle /which /shows /all /forces /that /act /on /it
a. /Shear /and /bending /moment /diagram
b. /Free-body /diagram
c. /Method /of /section
d. /Method /of /joints /- /verified /answer(s)-✔✔B
