General Science Questions

Q:

The radioactive element most commonly detected in humans is

A) potassium-40 B) cobalt-60
C) iodine-131 D) plutonium-238
 
Answer & Explanation Answer: A) potassium-40

Explanation:
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Q:

Chilling is most commonly practiced by

Answer

Chilling is most commonly practiced by Food Handlers like restaurents, hotels,...


 


 Chilling_is_most_commonly_practiced_by1556260019.jpg image







    • Chilling or Cooling is nothing but preserving the food in a cool storage like refrigerators.



 

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Q:

The Ozone Layer restricts from

A) Infrared Rays B) Radio waves
C) Ultraviolet Radiation D) X-Rays and Gamma Rays
 
Answer & Explanation Answer: C) Ultraviolet Radiation

Explanation:

The Ozone layer which is present in the Earth's atmosphere protects it by restricting from UV or Ultraviolet radiation, the dangerous rays contained by Sun.

the_ozone_layer_restricts_us_from1542267550.jpg image

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Q:

The filament of an electric bulb is made of

A) tungsten B) nichrome
C) graphite D) iron
 
Answer & Explanation Answer: A) tungsten

Explanation:

A filament is a metal wire that glows when electricity is channeled into it. The filament of an electric bulb is made of Tunsten. 

 

The_filament_of_an_electric_bulb_is_made_of1554113110.jpg image

 

Because of its high melting point and its greatest tensile strength, it makes for a good filament in light bulbs.

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Q:

Which of the following foods does not support bacterial growth?

A) Raw carrots B) Sauted onions
C) Refried beans D) Cooked rice
 
Answer & Explanation Answer: A) Raw carrots

Explanation:

Cooked food create an enabling environment for bacteria to grow because of their moisture content & of the normal temperature of the food. 

raw_food_vs_cooked_food1591419246.png image

Raw food does not offer suitable conditions for bacteria growth. 

 

Hence, from the given options raw carrots does not support bacterial growth.

 

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Q:

Which of the following statements concerning atmosphere of the Earth are correct?

1. In stratosphere, temperature increases with altitude.

2. In mesosphere, temperature decreases with altitude.

3. The lowest temperature of the atmosphere is recorded in the upper part of mesosphere.

4. Tropopause is an isothermal zone.

Select the correct answer using the code given below.

A) 1 and 2 only B) 1, 2 and 3 only
C) 3 and 4 only D) 1, 2, 3 and 4
 
Answer & Explanation Answer: D) 1, 2, 3 and 4

Explanation:

In troposphere and mesosphere, temperature declines with increasing altitude. In stratosphere and thermosphere, temperature increases with increasing altitude.The coldest temperatures in Earth’s atmosphere occur at the top of mesosphere, the Mesopause, especially in the summer near the pole.Transitional layers of atmosphere include tropopause, stratopause, and mesopause. These layers are relatively thin and are located between major layers of atmosphere. These have contrasting thermal properties. Hence, in these layers there is no change in temperature with change in altitude.

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Q:

When a gas is turned into a liquid, the process is called

A) condensation B) evaporation
C) deposition D) sublimation
 
Answer & Explanation Answer: A) condensation

Explanation:
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Q:

Which of the following plants is not capable of manufacturing own food?

A) Algae B) Mushroom
C) Carrot D) Cabbage
 
Answer & Explanation Answer: B) Mushroom

Explanation:
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