Questions

Q:

Hard disk is coated in both side with

A) Carbon layer B) Magnetic metallic oxide
C) Optical metallic oxide D) All of the above
 
Answer & Explanation Answer: B) Magnetic metallic oxide

Explanation:

Hard_disk_is_coated_in_both_side_with1551862660.jpg image

Hard disk is coated in both side with Magnetic metallic oxide.

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Q:

A cup of hot coffee is placed on a metal table in a room. By which of the following methods does it lose heat?

A) conduction and convection only B) conduction and radiation only
C) convection and radiation only D) conduction, convection and radiation
 
Answer & Explanation Answer: D) conduction, convection and radiation

Explanation:

Part of the heat is conducted away by the metal table. Convection currents in air near the surface of the coffee are set up which accounts for some heat loss. Heat is also lost by radiation from the hot coffee to the surroundings. Most of the heat is lost by the last method.

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Q:

1.Ravens are black.Ravens are evil.All evil are black

2.Horses are faster than eagles.All eagles are hawks.Horses are faster than hawks

3.No priest is a saint.Peter is a priest.Peter is a saint.

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

Explanation:
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Q:

I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.

What am I?

Answer

A Skeleton is what is whole but incomplete, have no eyes, yet can see. We can see, and see right through it. The largest part is one fourth of what it once was i.e body.

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Q:

____ was India's first satellite launched from Indian-made launch vehicle.

 

A) Aryabhata B) Rohini
C) Bhaskara-1 D) INSAT-1A
 
Answer & Explanation Answer: B) Rohini

Explanation:
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Q:

The main buffer system of the human blood is

A) H2CO3 B) H2SO4
C) CO2 D) O3
 
Answer & Explanation Answer: A) H2CO3

Explanation:

the_main_buffer_system_of_the_human_blood_is1556690852.jpg image

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Q:

What is the measurement at remote distances by means of a radio -link from the object to the ground called?

Answer

Telemetry

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Subject: General Science

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Q:

A boy sitting in a train moving with a uniform velocity drops a coin outside. A man standing outside the train will find the trajectory of the coin to be

A) a parabola B) a circle
C) a horizontal straight line D) a vertical straight line
 
Answer & Explanation Answer: A) a parabola

Explanation:

Parabola, because when the coin is dropped at a particular point, it has the same velocity as the running train. So by Newton's first law, it continues its motion horizontally with that velocity. But then, it is also pulled down by earth's gravity continuously. In this situation its horizontal motion gives way to the parabolic motion until it reaches the ground.

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