Q41. Fat can be seperated from milk in a cream seperator because of :

A) Gravitational Force

B) Cohesive Force

C) Centrifugal Force

D) Centripetal Force

✔ Correct Answer: Centrifugal Force

View Explanation →

Q42. Nucleons are

A) neutrons and electros

B) protons and neutrons

C) protons, neutrons and electrons

D) protons and electrons

✔ Correct Answer: protons and neutrons

View Explanation →

Q43. If a barometric reading is falling, this usually indicates what

A) Decreasing pressure

B) Increasing pressure

C) None

D) No pressure

✔ Correct Answer: Decreasing pressure

View Explanation →

Q44. Where does hydroelectric energy come from?

A) Water

B) Air

C) All of the above

D) Solar

✔ Correct Answer: Water

View Explanation →

Q45. In atomic reactors,graphite is used as

A) fuel

B) lubricant

C) moderator

D) linear of the ractor

✔ Correct Answer: moderator

View Explanation →

Q46. Which among the following noble gas has highest molar mass?

A) Ne

B) Kr

C) Xe

D) Ar

✔ Correct Answer: Xe

View Explanation →

Q47. Which of the following is not a vector quantity?

A) velocity

B) speed

C) displacement

D) torque

✔ Correct Answer: speed

View Explanation →

Q48. In fireworks, the green flame is produced because of

A) Potassium

B) Sodium

C) Mercury

D) Barium

✔ Correct Answer: Barium

View Explanation →

Q49. The speed of light will be minimum while passing through

A) vaccum

B) water

C) glass

D) air

✔ Correct Answer: glass

View Explanation →

Q50. SI unit of equivalent conductance

A) Siemens m2/equivalent

B) ohm/cm

C) mho/cm

D) Siemens/equivalent

✔ Correct Answer: Siemens m2/equivalent

View Explanation →

Q51. Which of the following is used in pencils?

A) Phosphorous

B) Silicon

C) Charcoal

D) Graphite

✔ Correct Answer: Graphite

View Explanation →

Q52. What color does yellow and green make?

A) Ocean mist

B) Lime

C) Tangerine

D) Maroon

✔ Correct Answer: Lime

View Explanation →

Q53. Nuclear sizes are expressed in a unit named

A) Angstrom

B) Fermi

C) Tesla

D) Newton

✔ Correct Answer: Fermi

View Explanation →

Q54. As you go down into a well, your weight

A) decreases slightly

B) increases slightly

C) None of the above

D) remains exactly the same

✔ Correct Answer: decreases slightly

View Explanation →

Q55. Which one of the following types of waves are used in a night vision apparatus?

A) Microwaves

B) Radio waves

C) None of the above

D) Infra-red waves

✔ Correct Answer: Infra-red waves

View Explanation →

Q56. The blue colour of the clear sky is due to

A) Dispersion of light

B) Diffraction of light

C) Refraction of light

D) Reflection of light

✔ Correct Answer: Dispersion of light

View Explanation →

Q57. The working principle of a washing machine is

A) diffusion

B) reverse osmosis

C) dialysis

D) centrifugation

✔ Correct Answer: centrifugation

View Explanation →

Q58. Fathometer is used to measure

A) Rainfall

B) Earthquakes

C) Sound intensity

D) Ocean depth

✔ Correct Answer: Ocean depth

View Explanation →

Q59. The colour of rainbow divides into seven colours due to

A) Reflection

B) Diffraction

C) Refraction

D) Dispersion

✔ Correct Answer: Dispersion

View Explanation →

Q60. A person is standing on a weighting machine in a moving lift. The weighing machine will show the least reading, when–

A) going up with a uniform speed

B) coming down with a uniform velocity

C) going up with a uniform velocity

D) Freely falling lift

✔ Correct Answer: Freely falling lift

View Explanation →
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