Q. The velocity profile in an incompressible, laminar boundary layer is shown in the figure below. U is the free-stream velocity, u(y) is the stream-wise velocity component. The area of the black shaded region in the figure below represents the (A) boundary layer thickness. (B) momentum ...

Q. An airplane requires a longer ground roll to lift-off on hot summer days because (A) the thrust is directly proportional to free-stream density. (B) the thrust is directly proportional to weight of the aircraft. (C) the lift-off distance is directly proportional to free-stream density. ...

Q. A NACA 0012 airfoil has a trailing edge flap. The airfoil is operating at an angle of attack of 5 degrees with un-deflected flap. If the flap is now deflected by 5 degrees downwards, the 𝐶𝐿 versus 𝛼 curve (A) shifts right and slope increases.  (B) shifts left and slope increases.   (C) ...

Q. The pilot of a conventional airplane that is flying steady and level at some altitude, deflects the port side aileron up and the starboard aileron down. The aircraft will then  (A) pitch, nose up. (B) roll with the starboard wing up. (C) pitch, nose down. (D) roll with the port wing ...

Q. A jet aircraft is initially flying steady and level at its maximum endurance condition. For the aircraft to fly steady and level, but faster at the same altitude, the pilot should (A) increase thrust alone. (B) increase thrust and increase angle of attack. (C) increase thrust and ...

Q. An unbiased coin is tossed six times in a row and four different such trials are conducted. One trial implies six tosses of the coin. If H stands for head and T stands for tail, the following are the observations from the four trials: (1) HTHTHT (2) TTHHHT (3) HTTHHT (4) ...

Q. A house has a number which needs to be identified. The following three statements are given that can help in identifying the house number. If the house number is a multiple of 3, then it is a number from 50 to 59. If the house number is NOT a multiple of 4, then it is a number from 60 to ...

Q. A contract is to be completed in 52 days and 125 identical robots were employed, each operational for 7 hours a day. After 39 days, five-seventh of the work was completed. How many additional robots would be required to complete the work on time, if each robot is now operational for 8 hours a ...

Q. A wire would enclose an area of 1936 m2, if it is bent into a square. The wire is cut into two pieces. The longer piece is thrice as long as the shorter piece. The long and the short pieces are bent into a square and a circle, respectively. Which of the following choices is closest to the sum ...

Q. Forty students watched films A, B and C over a week. Each student watched either only one film or all three. Thirteen students watched film A, sixteen students watched film B and nineteen students watched film C. How many students watched all three films? ...

Q. The perimeters of a circle, a square and an equilateral triangle are equal. Which one of the following statements is true? (A) The circle has the largest area. (B) The square has the largest area. (C) The equilateral triangle has the largest area. (D) All the three shapes have the ...

Q. Find the missing group of letters in the following series: BC, FGH, LMNO,          _                      (A) UVWXY         (B) ...