A fan produces a feeling of comfort during hot weather because:

• fan supplies cool air
• our body radiates more heat in air
• conductivity of air increases
• our perspiration evaporates rapidly
Correct Option: D  [ our perspiration evaporates rapidly ]

Remark:

What is the name of a technology that allows telephone calls to be made over computer networks like the internet?

• VoIP
• GSM
• Modem
• CDMA
Correct Option: A  [ VoIP ]

Remark:

CNG stands for:

• Compressed Natural Gasoline
• Compressed Natural Gas
• Compressed Nitrogen Gas
• Compressed Neon Gas
Correct Option: B  [ Compressed Natural Gas ]

Remark:

Which of the following is the best conductor of heat ?

• mercury
• silver
• leather
• benzene
Correct Option: B  [ silver ]

Remark:

Which gas is used as fire extinguisher?

• Nitrogen dioxide
• Carbon monoxide
• Carbon dioxide
• Nitrous oxide
Correct Option: C  [ Carbon dioxide ]

Remark:

Which of the following is a communicable disease?

• Measles
• Scurvy
• Asthma
• Diabetes
Correct Option: A  [ Measles ]

Remark:

Lack of Vitamin A may cause

• Poor night vision
• Rickets
• Beri Beri
• None of these
Correct Option: A  [ Poor night vision ]

Remark:

Widal test is employed to diagnose:

• Typhoid
• Cholera
• Tuberculosis
• AIDS
Correct Option: A  [ Typhoid ]

Remark:

The sky looks blue due to

• Dispersion of Sunlight
• Scattering of Sunlight
• Refraction of Sunlight
• None of these
Correct Option: B  [ Scattering of Sunlight ]

Remark: The scattering of sunlight is a phenomenon that occurs when sunlight interacts with particles or molecules in the Earth's atmosphere, causing the light to change direction and spread out in various directions.

The waves which can propagate even through the vacuum,are called __________.

• Mechanical waves
• Reverse waves
• Inverted waves
• Electromagnetic waves
Correct Option: D  [ Electromagnetic waves ]

Remark: