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MCQs

Total Questions : 104 | Page 1 of 11 pages
Question 1. The general solution of the different equation d2y/dt2 + dy/dt - 2t = 0 is
  1.    Ae-t + Be2t
  2.    Ae-2t + Be-t
  3.    Ae-2t + Bet
  4.    Aet + Be2t
 Discuss Question
Answer: Option C. -> Ae-2t + Bet


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Question 2. In an aircraft, constant roll rate can be produced using ailerons by applying
  1.    a step input.
  2.    a ramp input.
  3.    a sinusoidal input.
  4.    an impulse input.
 Discuss Question
Answer: Option D. -> an impulse input.


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Question 3. An aircraft in trimmed condition has zero pitching moment at
  1.    its aerodynamic centre.
  2.    its centre of gravity.
  3.    25% of its mean aerodynamic chord.
  4.    50% of its wing root chord.
 Discuss Question
Answer: Option B. -> its centre of gravity.


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Question 4. The constraint A2 = A on any square matrix A is satisfied for
  1.    the identity matrix only.
  2.    the null matrix only.
  3.    both the identity matrix and the null matrix.
  4.    no square matrix A.
 Discuss Question
Answer: Option C. -> both the identity matrix and the null matrix.


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Question 5. For a symmetric airfoil, the lift coefficient for zero degree angle of attack is
  1.    "“ 1.0
  2.    0.0
  3.    0.5
  4.    1.0
 Discuss Question
Answer: Option B. -> 0.0


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Question 6. The governing equation for the static transverse deflection of a beam under an uniformly distributed load, according to Euler-Bernoulli (engineering) beam theory, is a
  1.    2nd order linear homogeneous partial differential equation.
  2.    4th order linear non-homogeneous ordinary differential equation.
  3.    2nd order linear non-homogeneous ordinary differential equation.
  4.    4th order nonlinear homogeneous ordinary differential equation.
 Discuss Question
Answer: Option B. -> 4th order linear non-homogeneous ordinary differential equation.


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Question 7. The Poisson's ratio,ν of most aircraft grade metallic alloys has values in the range:
  1.    âˆ’1 ≤ν ≤0
  2.    0 ≤ ν ≤0.2
  3.    0.2 ≤ν ≤0.4
  4.    0.4 ≤ν ≤0.5
 Discuss Question
Answer: Option C. -> 0.2 ≤ν ≤0.4


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Question 8. The shadowgraph flow visualization technique depends on
  1.    the variation of the value of density in the flow.
  2.    the first derivative of density with respect to spatial coordinate.
  3.    the second derivative of density with respect to spatial coordinate.
  4.    the third derivative of density with respect to spatial coordinate.
 Discuss Question
Answer: Option C. -> the second derivative of density with respect to spatial coordinate.


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Question 9. The Hohmann ellipse used as earth-Mars transfer orbit has
  1.    apogee at earth and perigee at Mars.
  2.    both apogee and perigee at earth.
  3.    apogee at Mars and perigee at earth.
  4.    both apogee and perigee at Mars.
 Discuss Question
Answer: Option C. -> apogee at Mars and perigee at earth.


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Question 10. The critical Mach number of an airfoil is attained when
  1.    the freestream Mach number is sonic.
  2.    the freestream Mach number is supersonic.
  3.    the Mach number somewhere on the airfoil is unity.
  4.    the Mach number everywhere on the airfoil is supersonic.
 Discuss Question
Answer: Option C. -> the Mach number somewhere on the airfoil is unity.


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