Airforce Group X 2021 Paper with Answer key 18 July

About this paper

This is the Indian Air Force Airmen Group X paper for 18 July 2021 (Shift 1), marked 'MBT' (memory-based test) on its cover, so it is a recollection rather than an official question booklet. Its 70 multiple-choice questions run 1–25 Physics, 26–50 Mathematics and 51–70 English, with the correct option printed under each question. Physics covers a Carnot engine, resistivity, Kepler's third law, the de Broglie wavelength, mirrors, capacitors, simple harmonic motion and LCR resonance; Maths covers standard deviation, calculus, probability, permutations, coordinate geometry, complex numbers and sets. The English part includes a four-question passage about a greedy man whose touch turns things to gold, along with idioms, error spotting, voice and narration. No marks or time limit are printed.

Exam

Airforce Group X

Subject

Airforce Group X

Year

2021

Questions

70

Pages

15

Answers included

Yes

Paper pattern

• Questions 1–25

  Physics

• Questions 26–50

  Mathematics

• Questions 51–70

  English: antonyms, one-word substitution, error spotting, voice, a reading passage, idioms, conditionals, spelling and narration

Topics covered

• Thermodynamics and kinetic theory
• Current electricity and resistivity
• Gravitation and Kepler's laws
• Dual nature of matter
• Ray optics and mirrors
• Capacitors
• Oscillations and AC circuits
• Statistics
• Calculus
• Probability and permutations
• Coordinate geometry
• Reading comprehension

Questions from this paper

1. A motorcycle starts from rest and accelerates uniformly to a speed of 54 km/h over a distance of 450 m. What is its acceleration?
2. An electron and a proton have the same kinetic energy. What is the ratio of the de Broglie wavelengths of the proton and the electron?
3. Find the standard deviation of 2, 4, 6, 8 and 10.
4. In how many ways can a 3-digit number be formed from the digits 1, 4, 3, 6, 5 and 7 so that it is divisible by 5 and no digit is repeated?
5. Three groups of children contain 3 girls and 1 boy, 2 girls and 2 boys, and 1 girl and 3 boys. One child is selected at random from each group. What is the probability that the three selected are 1 girl and 2 boys?
6. Change into the passive voice: Animals cannot make tools.