Indian Air Force Group X & Y Exam Analysis 12th July 2021 (All Shifts), Questions, Difficulty Level

Indian Air Force X & Y 2021 Exam Analysis 2021: Difficulty Level

Here is the exam pattern of Airmen Group X & Y exam 2021:

Name of the Group	Subject & No. of Questions	Total Marks	Exam Duration	Difficulty Level
Airmen Group X	English: 20 Questions Physics: 25 QuestionsMathematics: 25 Questions	70 marks	60 minutes	Moderate
Airmen Group Y	English: 20 Questions Reasoning & General Awareness: 30 Questions	50 marks	45 minutes
Airmen Group X & Y	English: 20 marks Physics: 25 QuestionMathematics: 25 QuestionsReasoning & General Awareness: 30 Questions	100 marks	85 minutes

Indian Air Force X & Y 2021 Exam: Difficulty Level 

The Air Force X & Y 2021 Exam was conducted in three shifts. The Paper was moderate when compared with the previous year exam analysis. Theoretical questions were easy & direct. There were no surprises for students in terms of difficulty level. Questions were uniformly asked form whole syllabus.

Memory Based Maths Questions Asked in Air Force X & Y 2021 Exam

Mathematics:

1. If the first number is 34 whose LCM and HCF are 136 and 17 respectively. Then, find the second number.  {Values are assumed and may not be same as asked in the exam}

Ans. 68

Sol.  Given,

First no. = 34

Second, no. = x (Let)

LCM = 136

HCF = 17

Formula: First no. Second, no. = LCMHCF

                 34 x = 13617

                     Second number (x)= 68

Memory Based English Questions Asked in Air Force X & Y 2021 Exam

Q1. Change the voice of the given sentence into active/ passive.

The people will make him king.

Answer- He will be made king by the people.

Q2. Choose the synonym for the word given in bold.

Futile

Answer- Useless.

Futile means incapable of producing any useful result.

Hence, useless is the correct synonym. 

Q3. Choose the correct antonym for the word given in bold.

Ambiguous

Answer- Lucid

Ambiguous means not clear, decided.

Lucid means expressed clearly, easy to understand.

Hence, the correct antonym.

Q4. Change the narration of the given sentence into Direct / Indirect Speech.

He said to me ‘I am doing my work’

Answer- He told me that he was doing his work.

Solution:

Said is changed to ‘Told’.

Inverted commas (" ") are removed and "that" is added.

The pronoun will be changed according to the subject of the reporting speech.

Q5. Choose the synonym for the word given in bold.

Admire

Answer- Praise.

Admire means regard with respect or warm approval.

Praise means expressing warm approval or admiration of.

Hence, the correct synonym.

Q6. Choose the correct spelling for the word.

Answer- Lieutenant

Lieutenant is the correct spelling for the given word.

A lieutenant is a deputy or substitute acting for a superior.

Q7. Choose the most appropriate one-word substitution for the group of words.

Lover of mankind

Answer- Philanthropist

A philanthropist is a person who seeks to promote the welfare of others, especially by the generous donation of money to good causes.

Q8. Choose the correct meaning of the given idiom.

Crocodile tears

Answer- An insincere display of grief.

Idiom- Crocodile tears mean – An insincere display of grief.

Q9. Choose the most appropriate one-word substitution for the group of words.

A well experienced person

Answer- A veteran

A veteran is a person who has had long experience in a particular field.

Q10. Spot the error in the given sentence.

She was shocked when she heard the news that he has died.

Answer- The correct sentence should be – She was shocked when she heard the news that he had died.

‘has died’ (present perfect tense) is wrong

Correct usage ‘Had died’ – past perfect tense.

Q11. Choose the correct form of noun for the word given in bold.

Move

Answer- Movement

Q12. Choose the correct plural form of the word given bold.

Commander in chief.

Answer- Commanders in chief (plural).

Memory Based GK Questions Asked in Air Force X & Y 2021 Exam

Qns 1. Who wrote the Akbarnama?

Ans. Abul Fazl

Qns 2. Where is the Headquarters of the World Health Organization?

Ans. Geneva, Switzerland

Qns 3. Fa Hien visited the court of which Indian ruler?

Ans. Chandragupta II

Qns 4. What is the currency of Saudi Arabia?

Ans. Saudi Riyal

Qns 5. Who has been crowned the Femina Miss India 2020?

Ans. Manasi Varanasi

Memory Based Physics Questions Asked in Air Force X & Y 2021 Exam

 Q1.  On Increasing resistance of the circuit then power

Ans. The power dissipated in a resistor is given by P = V2/R which means power decreases if resistance increases.

Q2. What will be the dimension of Pressure ??

Ans.  Pressure (P) = Force × Area-1 = the pressure is dimensionally represented as M^1 L^-1T^-2

Q3. What do you get by Boyle's law?

Ans. The pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature.

P1V1 =P2V2

Q4. What is effect on volume if temperature of the gas increases at constant pressure 

Ans. 

The volume of the gas increases as the temperature increases.

As temperature increases, the molecules of the gas have more kinetic energy. They strike the surface of the container with more force.

Q5. If oil is filled in a container and acceleration is applied on it then what will the effect on the surface of oil be?

Ans. 

Let we give acceleration to the container from point A towards B. Then Level of the oil’s surface in the container will change.  And due to the height of the oil’s surface or level of the oil’s surface the pressure will be different at every point of the surface of the oil.

Q6. If the length of two pendulums are given as h and 2h then what will be the ratio of their time period. 

Ans. Under root (2)

Sol.

Let Time period is T1 and T2

Time period of Pendulum = Under root ( g / h )

Then, T1/T2 = Under root ( 2h/h ) = under root (2)

Q7. What will be the energy at the mean position of a SHM motion ? or

In a SHM Motion, what will be kinetic energy at Mean Position ?

Ans. 

At the mean position, the velocity of the particle in S.H.M. is maximum and displacement is minimum, that is, x=0. Thus, the total energy in simple harmonic motion is purely kinetic and that will be maximum.

Q8. The temperature of a gas is raised from 27 C to 327 C. Then find the ratio of root mean square speed - 

Ans. 

T1 = 27 C = (27 +273)K = 300K

T2 = 327 C = (327 +273) K = 600K

 Rms Velocity Directly proportional to under root of temperature.

Then ratio = ( under root ( 300K))/(Under root (600K) = Under root (½)  

Q9. at a certain height from the surface of the earth the value of gravity is 1/16 times of its original value at the surface of the earth then find the height ?

 ( M = Mass of Earth, R = Radius of earth and g= gravity of the earth )

Ans. 

g = (G*M)/R^2 

Now Gravity at height h 

g’ = ( G * M ) / (R+h)^2 

g/g’ = ( R +h)^2/R^2

16 = ( R +h)^2/R^2

4 = (R+h)/(R)

3R = h 

Q10. if the resistance of a coil is 5 ohm in DC Circuit. Then the resistance in AC –

Ans. 

In an AC circuit the effective resistance of a coil is due to the DC resistance and the inductance of the Coil.

 It means that the resistance will increase in AC. 

R ( effective) = √ (R^2 + XL^2)

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