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Free MCQs with Answers | Military Brat Defence Academy

Q: If 60 J of work is done in 2 s, power is:

Correct Answer: A. 30 W. Power = work/time.

Q: The simplest hydrocarbon is:

Correct Answer: A. methane. Methane, CH4, is the simplest hydrocarbon.

Q: Rusting of iron requires oxygen and:

Correct Answer: B. moisture. Rusting needs oxygen and moisture.

Q: Which metal is liquid at room temperature?

Correct Answer: B. Mercury. Mercury is liquid at room temperature.

Q: A solution with pH less than 7 is generally:

Correct Answer: B. acidic. pH below 7 indicates acidity.

Q: Acids turn blue litmus:

Correct Answer: A. red. Acids turn blue litmus red.

Q: An atom has atomic number 8. Its number of protons is:

Correct Answer: A. 8. Atomic number equals the number of protons.

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

Correct Answer: A. 27 m. Use s = ut + 1/2 at².

Q: A 2 kg body accelerates at 4 m/s². The net force is:

Correct Answer: A. 8 N. Use F = ma.

Q: If 3x + 11 = 38, x equals:

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

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QID #1143947 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 05 Medium

If 60 J of work is done in 2 s, power is:

Correct Answer: A. 30 W
Power = work/time.

Question: If 60 J of work is done in 2 s, power is:

A. 30 W

B. 120 W

C. 62 W

D. 15 W

Correct Answer: A. 30 WExplanation: Power = work/time.

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QID #1143946 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 02 Medium

The simplest hydrocarbon is:

Correct Answer: A. methane
Methane, CH4, is the simplest hydrocarbon.

Question: The simplest hydrocarbon is:

A. methane

B. ethane

C. ethene

D. benzene

Correct Answer: A. methaneExplanation: Methane, CH4, is the simplest hydrocarbon.

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QID #1143945 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 02 Medium

Rusting of iron requires oxygen and:

Correct Answer: B. moisture
Rusting needs oxygen and moisture.

Question: Rusting of iron requires oxygen and:

A. nitrogen

B. moisture

C. hydrogen

D. carbon dioxide only

Correct Answer: B. moistureExplanation: Rusting needs oxygen and moisture.

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QID #1143944 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 02 Medium

Which metal is liquid at room temperature?

Correct Answer: B. Mercury
Mercury is liquid at room temperature.

Question: Which metal is liquid at room temperature?

A. Iron

B. Mercury

C. Copper

D. Aluminium

Correct Answer: B. MercuryExplanation: Mercury is liquid at room temperature.

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QID #1143943 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 02 Medium

A solution with pH less than 7 is generally:

Correct Answer: B. acidic
pH below 7 indicates acidity.

Question: A solution with pH less than 7 is generally:

A. basic

B. acidic

C. neutral

D. salty only

Correct Answer: B. acidicExplanation: pH below 7 indicates acidity.

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QID #1143942 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 02 Medium

Acids turn blue litmus:

Correct Answer: A. red
Acids turn blue litmus red.

Question: Acids turn blue litmus:

A. red

B. green

C. yellow

D. blue

Correct Answer: A. redExplanation: Acids turn blue litmus red.

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QID #1143941 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 02 Medium

An atom has atomic number 8. Its number of protons is:

Correct Answer: A. 8
Atomic number equals the number of protons.

Question: An atom has atomic number 8. Its number of protons is:

A. 8

B. 9

C. 7

D. 14

Correct Answer: A. 8Explanation: Atomic number equals the number of protons.

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QID #1143940 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 05 Medium

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

Correct Answer: A. 27 m
Use s = ut + 1/2 at².

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

A. 27 m

B. 10 m

C. 9 m

D. 36 m

Correct Answer: A. 27 mExplanation: Use s = ut + 1/2 at².

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QID #1143939 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 05 Medium

A 2 kg body accelerates at 4 m/s². The net force is:

Correct Answer: A. 8 N
Use F = ma.

Question: A 2 kg body accelerates at 4 m/s². The net force is:

A. 8 N

B. 6 N

C. 16 N

D. 4 N

Correct Answer: A. 8 NExplanation: Use F = ma.

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QID #1143938 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 05 Medium

If 3x + 11 = 38, x equals:

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

Question: If 3x + 11 = 38, x equals:

A. 8

B. 9

C. 10

D. 11

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

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QID #1143937 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 02 Medium

A solution has pH 4. It is:

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

Question: A solution has pH 4. 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 #1143936 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 02 Medium

An element X has valency 3. 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 3. 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 #1143935 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 02 Medium

Buoyant force on an immersed body equals the weight of:

Correct Answer: B. the displaced fluid
Archimedes' principle equates buoyant force to displaced fluid weight.

Question: Buoyant force on an immersed body equals the weight of:

A. the body

B. the displaced fluid

C. the container

D. the atmosphere

Correct Answer: B. the displaced fluidExplanation: Archimedes' principle equates buoyant force to displaced fluid weight.

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QID #1143934 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 02 Medium

Pressure is defined as:

Correct Answer: B. Force ÷ area
Pressure = force per unit area.

Question: Pressure is defined as:

A. Force × area

B. Force ÷ area

C. Area ÷ force

D. Mass × volume

Correct Answer: B. Force ÷ areaExplanation: Pressure = force per unit area.

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QID #1143933 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 02 Medium

Kinetic energy of a body depends on:

Correct Answer: A. mass and velocity
KE = 1/2 mv².

Question: Kinetic energy of a body depends on:

A. mass and velocity

B. pressure only

C. density only

D. temperature only

Correct Answer: A. mass and velocityExplanation: KE = 1/2 mv².

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QID #1143932 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 02 Medium

A sample has mass 220 g and volume 70 cm³. Density is:

Correct Answer: A. 3.14286 g/cm³
Density = mass/volume.

Question: A sample has mass 220 g and volume 70 cm³. Density is:

A. 3.14286 g/cm³

B. 15400 g/cm³

C. 0.318182 g/cm³

D. 290 g/cm³

Correct Answer: A. 3.14286 g/cm³Explanation: Density = mass/volume.

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QID #1143931 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 05 Medium

What is 35% of 340?

Correct Answer: B. 119
35% of 340 = 119.

Question: What is 35% of 340?

A. 59

B. 119

C. 139

D. 221

Correct Answer: B. 119Explanation: 35% of 340 = 119.

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QID #1143930 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 04 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 #1143929 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 04 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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QID #1143928 Agniveer Army Technical 2027 Mock Test Series Agniveer Army Technical Online Mock Test 02 Medium

A wave has frequency 60 Hz and wavelength 4 m. Its speed is:

Correct Answer: A. 240 m/s
Wave speed v=fλ.

Question: A wave has frequency 60 Hz and wavelength 4 m. Its speed is:

A. 240 m/s

B. 15 m/s

C. 64 m/s

D. 0.0666667 m/s

Correct Answer: A. 240 m/sExplanation: Wave speed v=fλ.

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