Question 81. A rocket motor has combustion chamber temperature of 2600 K and the products have molecular weight of 25 g/mol and ratio of specific heats 1.2. The universal gas constant is 8314 J/kg-mole-K. The value of theoretical c* (in m/s) is ____.

Question 82. Which one of the following flight instruments is used on an aircraft to determine its attitude in flight?

Question 83. Which one of the following is the most stable configuration of an airplane in roll?

Question 84. At x = 0 , the function y = |x| is

Question 85. A wing-body alone configuration airplane with a wing loading of W/S = 1000 N/m2 is flying in cruise condition at a speed V = 90m/s at sea-level (air density at sea-level P∞ = 1.22 kg/m3). The zero lift pitching moment coefficient of the airplane is Cwbmac = Cm0 = -0.06 and the location of airplane aerodynamic center from the wing leading edge is Xac = 0.25c. Here c is the chord length. Distance of center of gravity of the aircraft (XCG) from the wing leading edge is

Question 86. All engineering students should learn mechanics, mathematics and how to do computation.                   I                                       II                                          III                                   IV
Which of the above underlined parts of the sentence is not appropriate?

Question 87. Mahatama Gandhi was known for his humility as

Question 88. If 3 ≤ X ≤ 5 and 8 ≤ Y ≤ 11 then which of the following options is TRUE?

Question 89. The Headmaster ___________ to speak to you. Which of the following options is incorrect to complete the above sentence?

Question 90. Select the pair that best expresses a relationship similar to that expressed in the pair: water: pipe::