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Free MCQs with Answers | Military Brat Defence Academy

Q: The most abundant gas in air is:

Correct Answer: B. nitrogen. Nitrogen is the most abundant gas in air.

Q: Pure water at room temperature has pH close to:

Correct Answer: C. 7. Pure water is approximately neutral.

Q: If 204 J of work is done in 6 s, power is:

Correct Answer: A. 34 W. Power = work/time.

Q: For u=7 m/s, a=4 m/s² and t=3 s, displacement is:

Correct Answer: A. 39 m. Use s = ut + 1/2 at².

Q: A 6 kg body accelerates at 4 m/s². The net force is:

Correct Answer: A. 24 N. Use F = ma.

Q: An atom has atomic number 10. Its number of protons is:

Correct Answer: A. 10. Atomic number equals the number of protons.

Q: A solution has pH 2. It is:

Correct Answer: A. acidic. A pH below 7 indicates an acidic solution.

Q: A prism can split white light into colours due to:

Correct Answer: B. dispersion. Dispersion separates colours because refractive index varies with wavelength.

Q: The earth wire is used mainly for:

Correct Answer: B. safety against electric shock. Earthing provides a safer path for fault current.

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QID #1144567 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 12 Medium

The most abundant gas in air is:

Correct Answer: B. nitrogen
Nitrogen is the most abundant gas in air.

Question: The most abundant gas in air is:

A. oxygen

B. nitrogen

C. carbon dioxide

D. argon

Correct Answer: B. nitrogenExplanation: Nitrogen is the most abundant gas in air.

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QID #1144566 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 12 Medium

Pure water at room temperature has pH close to:

Correct Answer: C. 7
Pure water is approximately neutral.

Question: Pure water at room temperature has pH close to:

A. 2

B. 5

C. 7

D. 12

Correct Answer: C. 7Explanation: Pure water is approximately neutral.

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QID #1144565 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 29 Medium

If 204 J of work is done in 6 s, power is:

Correct Answer: A. 34 W
Power = work/time.

Question: If 204 J of work is done in 6 s, power is:

A. 34 W

B. 1224 W

C. 210 W

D. 17 W

Correct Answer: A. 34 WExplanation: Power = work/time.

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QID #1144564 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 29 Medium

For u=7 m/s, a=4 m/s² and t=3 s, displacement is:

Correct Answer: A. 39 m
Use s = ut + 1/2 at².

Question: For u=7 m/s, a=4 m/s² and t=3 s, displacement is:

A. 39 m

B. 14 m

C. 21 m

D. 36 m

Correct Answer: A. 39 mExplanation: Use s = ut + 1/2 at².

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QID #1144563 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 29 Medium

A 6 kg body accelerates at 4 m/s². The net force is:

Correct Answer: A. 24 N
Use F = ma.

Question: A 6 kg body accelerates at 4 m/s². The net force is:

A. 24 N

B. 10 N

C. 48 N

D. 12 N

Correct Answer: A. 24 NExplanation: Use F = ma.

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QID #1144562 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 12 Medium

An atom has atomic number 10. Its number of protons is:

Correct Answer: A. 10
Atomic number equals the number of protons.

Question: An atom has atomic number 10. Its number of protons is:

A. 10

B. 11

C. 9

D. 16

Correct Answer: A. 10Explanation: Atomic number equals the number of protons.

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QID #1144561 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 12 Medium

A solution has pH 2. It is:

Correct Answer: A. acidic
A pH below 7 indicates an acidic solution.

Question: A solution has pH 2. It is:

A. acidic

B. basic

C. neutral

D. metallic

Correct Answer: A. acidicExplanation: A pH below 7 indicates an acidic solution.

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QID #1144560 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 12 Medium

An element X has valency 1. If oxygen has valency 2, which statement is useful while writing the simplest oxide formula?

Correct Answer: A. Criss-cross the valencies and simplify the ratio
The criss-cross method uses valencies to obtain the simplest combining ratio.

Question: An element X has valency 1. If oxygen has valency 2, which statement is useful while writing the simplest oxide formula?

A. Criss-cross the valencies and simplify the ratio

B. Add the valencies only

C. Ignore oxygen's valency

D. Use atomic masses instead

Correct Answer: A. Criss-cross the valencies and simplify the ratioExplanation: The criss-cross method uses valencies to obtain the simplest combining ratio.

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QID #1144559 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 12 Medium

A prism can split white light into colours due to:

Correct Answer: B. dispersion
Dispersion separates colours because refractive index varies with wavelength.

Question: A prism can split white light into colours due to:

A. reflection only

B. dispersion

C. conduction

D. polarization only

Correct Answer: B. dispersionExplanation: Dispersion separates colours because refractive index varies with wavelength.

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QID #1144558 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 12 Medium

The earth wire is used mainly for:

Correct Answer: B. safety against electric shock
Earthing provides a safer path for fault current.

Question: The earth wire is used mainly for:

A. increasing voltage

B. safety against electric shock

C. reducing frequency

D. increasing power

Correct Answer: B. safety against electric shockExplanation: Earthing provides a safer path for fault current.

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QID #1144557 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 29 Medium

If 3x + 35 = 62, x equals:

Correct Answer: B. 9
3x=27; hence x=9.

Question: If 3x + 35 = 62, x equals:

A. 8

B. 9

C. 10

D. 11

Correct Answer: B. 9Explanation: 3x=27; hence x=9.

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QID #1144556 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 29 Medium

What is 35% of 820?

Correct Answer: B. 287
35% of 820 = 287.

Question: What is 35% of 820?

A. 143

B. 287

C. 307

D. 533

Correct Answer: B. 287Explanation: 35% of 820 = 287.

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QID #1144555 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 28 Medium

Like magnetic poles:

Correct Answer: B. repel
Like poles repel.

Question: Like magnetic poles:

A. attract

B. repel

C. neutralize permanently

D. have no effect

Correct Answer: B. repelExplanation: Like poles repel.

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QID #1144554 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 12 Medium

A fuse is connected in a circuit mainly to:

Correct Answer: B. protect against excess current
A fuse protects a circuit from excessive current.

Question: A fuse is connected in a circuit mainly to:

A. increase current

B. protect against excess current

C. raise voltage

D. store charge

Correct Answer: B. protect against excess currentExplanation: A fuse protects a circuit from excessive current.

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QID #1144553 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 12 Medium

A heat engine converts heat energy mainly into:

Correct Answer: A. mechanical work
Heat engines convert thermal energy into mechanical work.

Question: A heat engine converts heat energy mainly into:

A. mechanical work

B. chemical energy

C. mass

D. pressure only

Correct Answer: A. mechanical workExplanation: Heat engines convert thermal energy into mechanical work.

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QID #1144552 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 12 Medium

The Sun produces energy mainly through:

Correct Answer: B. nuclear fusion
Solar energy is produced by nuclear fusion.

Question: The Sun produces energy mainly through:

A. combustion

B. nuclear fusion

C. nuclear fission

D. chemical reaction

Correct Answer: B. nuclear fusionExplanation: Solar energy is produced by nuclear fusion.

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QID #1144551 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 12 Medium

A sample has mass 320 g and volume 70 cm³. Density is:

Correct Answer: A. 4.57143 g/cm³
Density = mass/volume.

Question: A sample has mass 320 g and volume 70 cm³. Density is:

A. 4.57143 g/cm³

B. 22400 g/cm³

C. 0.21875 g/cm³

D. 390 g/cm³

Correct Answer: A. 4.57143 g/cm³Explanation: Density = mass/volume.

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QID #1144550 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 12 Medium

A current of 2 A flows through a resistance of 5 Ω. The voltage is:

Correct Answer: A. 10 V
Ohm's law: V = IR.

Question: A current of 2 A flows through a resistance of 5 Ω. The voltage is:

A. 10 V

B. 7 V

C. 2.5 V

D. 0.4 V

Correct Answer: A. 10 VExplanation: Ohm's law: V = IR.

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QID #1144549 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 12 Medium

A force of 34 N moves an object 2 m in the force direction. Work done is:

Correct Answer: A. 68 J
Work = force × displacement.

Question: A force of 34 N moves an object 2 m in the force direction. Work done is:

A. 68 J

B. 36 J

C. 17 J

D. 136 J

Correct Answer: A. 68 JExplanation: Work = force × displacement.

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QID #1144548 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 28 Medium

Electric power is commonly calculated by:

Correct Answer: A. P=VI
Electric power P = VI.

Question: Electric power is commonly calculated by:

A. P=VI

B. P=IR

C. P=V/R only

D. P=Q/t only

Correct Answer: A. P=VIExplanation: Electric power P = VI.

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