Questions and answers for exam Preparation

MCQs

Total Questions : 104 | Page 10 of 11 pages

Question 91. In a factory, two machines M1 and M2 manufacture 60% and 40% of the autocomponents respectively. Out of the total production, 2% of M1 and 3% of M2 are found to be defective. If a randomly drawn autocomponent from the combined lot is found defective, what is the probability that it was manufactured by M2?

0.35
0.45
0.5
0.4

Discuss Question

Answer: Option C. -> 0.5

-NA-

Question 92. If |-2X + 9| = 3 3 then the possible value of |-X| - X2 would be:

Discuss Question

Answer: Option B. -> -30

-NA-

Question 93. Velocity of an object fired directly in upward direction is given by V = 80 - 32 t, where t (time) is in seconds. When will the velocity be between 32 m/sec and 64 m/sec?

(1, 3/2)
(1/2, 1)
(1/2, 3/2)
(1, 3)

Discuss Question

Answer: Option C. -> (1/2, 3/2)

-NA-

Question 94. A supersonic airplane is expected to fly at both subsonic and supersonic speeds during its whole flight course. Which one of the following statements is TRUE?

Airplane will experience less stability in pitch at supersonic speeds than at subsonic speeds
Airplane will feel no change in pitch stability
Airplane will experience more stability in pitch at supersonic speeds than at subsonic speeds
Pitch stability cannot be inferred from the information given

Discuss Question

Answer: Option C. -> Airplane will experience more stability in pitch at supersonic speeds than at subsonic speeds

-NA-

Question 95. Which one of the following is favorable for an airplane operation?

Tail wind in cruise and head wind in landing
Tail wind both in cruise and landing
Head wind both in cruise and landing
Head wind in cruise and tail wind in landing

Discuss Question

Answer: Option A. -> Tail wind in cruise and head wind in landing

-NA-

Question 96. The x and y velocity components of a two dimensional flow field are, u = cy/(x2 + y2) , v = cx/(x2 + y2), where c is a constant. The streamlines are a family of

hyperbolas
hyperbolas
ellipses
circles

Discuss Question

Answer: Option B. -> hyperbolas

-NA-

Question 97. Which one of the following is TRUE with respect to Phugoid mode of an aircraft?

Frequency is directly proportional to flight speed
Frequency is inversely proportional to flight speed
Frequency is directly proportional to the square root of flight speed
Frequency is inversely proportional to the square root of flight speed

Discuss Question

Answer: Option B. -> Frequency is inversely proportional to flight speed

-NA-

Question 98. A gas turbine engine is mounted on an aircraft which can attain a maximum altitude of 11 km from sea level. The combustor volume of this engine is decided based on conditions at

sea level
8 km altitude
5.5 km altitude
11 km altitude

Discuss Question

Answer: Option D. -> 11 km altitude

-NA-

Question 99. The mass flow rate of air through an aircraft engine is 10 kg/s. The compressor outlet temperature is 400 K and the turbine inlet temperature is 1800 K. The heating value of the fuel is 42 MJ/kg and the specific heat at constant pressure is 1 kJ/kg-K. The mass flow rate of the fuel in kg/s is approximately ___________

0.2 to 0.25
0.5 to 0.55
0.3 to 0.35
0.7 to 0.75

Discuss Question

Answer: Option C. -> 0.3 to 0.35

-NA-

Question 100. Consider two engines P and Q. In P, the high pressure turbine blades are cooled with a bleed of 5% from the compressor after the compression process and in Q the turbine blades are not cooled. Comparing engine P with engine Q, which one of the following is NOT TRUE?