Questions

Q:

Which is the longest railway platform in the world?

A) Mumbai B) Gorakhpur
C) Thane D) Kochi
 
Answer & Explanation Answer: B) Gorakhpur

Explanation:

Gorakhpur railway platform in Uttar Pradesh is the longest railway platform in the world.

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Q:

The Hydraulic Break works on the principle of _____ ?

A) Pascal's Law B) Boyle's law
C) Coulomb's law D) Bernouli's law
 
Answer & Explanation Answer: A) Pascal's Law

Explanation:
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Q:

Which path through the carbon cycle is possible?

A) Animal ----> Plant ----> Atmosphere B) Plant ----> Animal ----> Atmosphere
C) Atmosphere ----> Plant ----> Animal D) Plant ----> Atmosphere -----> Animal
 
Answer & Explanation Answer: B) Plant ----> Animal ----> Atmosphere

Explanation:

During daylight hours, plants capture carbon dioxide from the atmosphere and use it to make carbohydrates which is stored as starch in the plant. Animals feed on the plants and extract the carbohydrates through their digestive system. The carbohydrates, namely glucose, are used by the animals for production of ATP through cellular respiration.

 

Cellar respiration in the animals produces carbon dioxide as a waste product. The carbon dioxide is released into the atmosphere, from where it is again captured by plants and the cycle is repeated.

 

Hence, option B) Plant ----> Animal ----> Atmosphere is the path possible in carbon cycle.

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Q:

At what temperature do pathogenic bacteria grow best in food?

A) 5 to 15 degrees Celsius B) 15 to 25 degrees Celsius
C) 20 to 45 degrees Celsius D) 40 to 65 degrees Celsius
 
Answer & Explanation Answer: C) 20 to 45 degrees Celsius

Explanation:

The Bacteria that causes Food Borne illness are called Food Borne Pathogens. Most of the pathogens are mesophilic in nature, optimum temperature may be around 20-45 degree celsius. This range of temperatures is often called the "Danger Zone." Dry foods do not support the growth of bacteria.

 

In order to kill pathogenic bacteria you need temperatures above 74ºC. Temperature is the easiest factor to control in order to prevent bacterial growth.

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Q:

What is another name for energy of motion?

A) Motional energy B) Potential energy
C) Kinetic energy D) Rotational energy
 
Answer & Explanation Answer: C) Kinetic energy

Explanation:

Every object has two typea of energies. They are ::

Potential energy

Kinetic energy

 

If the object is in motion, then it has Kinetic energy (KE). Potential energy (PE) is energy that is "stored" because of the position and/or arrangement of the object.

 

Hence, another name for energy of motion is called Kinetic energy.

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Q:

What is an error in a program called

A) Power fail B) Crash
C) Virus D) Bug
 
Answer & Explanation Answer: D) Bug

Explanation:

In computer technology, a coding error in a computer program is called a bug.

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Q:

Which has the lowest albedo?

A) dark surfaces B) light surfaces
C) Both A & B D) None of the above
 
Answer & Explanation Answer: A) dark surfaces

Explanation:

Albedo refers to a material's ability to reflect sunlight. Since 30% of the sun's energy is reflected by the entire earth, the earth has an average albedo of 0.30.

Generally, dark surfaces have a low albedo and light surfaces have a high albedo.

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Q:

Magnetic field lines about a current-carrying wire

A) circle the wire in closed loops B) extend radially from the wire
C) both of these D) None of the above
 
Answer & Explanation Answer: A) circle the wire in closed loops

Explanation:

Electric current produces a magnetic field. This magnetic field can be visualized as a pattern of circular field lines surrounding a wire.

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