1021. Quantity of fresh air required for a man is _________.

A. 1000 Cubic feet of air for every 20 Minutes *
B. 1000 Cubic feet of air for every 20 seconds
C. 1000 Cubic feet of air for every 10 Minutes
D. 1000 Cubic feet of air for every 10 seconds

1022. Where does the oxygen that keeps us alive come from ?

A. Carbon Dioxide *
B. Carbonates abosorbed from soil
C. Oxides of minerals
D. Water

1023. Which one of the following metals pollutes the air of the city having large number of automobiles?

A. Cadium
B. Chromium
C. Lead *
D. Copper

1024. The snow on the mountains doesn’t melt all at once When it is heated by the sun because______

A. It becomes very hard
B. It reflects most of the heat from the sun *
C. It has a low specific heat capacity
D. It has high latent heat of fusion.

1025. Where is blood formed in the human body ?

A. Heart *
B. Spleen
C. Bone marrow
D. Liver

1026. Which of the following is the name of the smallest part of the matter discovered by the scientists?

A. Proton
B. Neutron
C. Positron
D. Quark

1027. Trachoma is a diseases of the ____________.

A. Brain
B. Larynx
C. Ear
D. Eye

1028. Sodium Depletion occurs in excessive sweating and cannot be corrected by drinking water alone. When uncorrected it may lead to ________

A. Muscle cramps, loss of energy, fatigue and faintness *
B. Increase of urea in blood
C. swelling of ankles and feet
D. renal failure

1029. The hear of a normal adult human being weights about __________

A. 200 Grams
B. 300 Grams *
C. 400 Grams
D. 500 Grams

1030. The part of the body directly affected by pneumonia is ________________.

A. Bone tissue
B. Epidermal tissue
C. Nervous System
D. Respiratory system *

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