Clinical wastes in hospitals are to be disposed of in which colored bags?

 # Clinical wastes in hospitals are to be disposed of in which colored bags?

A. Yellow

B. Black

C. Green

D. Red

The correct answer is A. Yellow.

Clinical wastes are disposed of in yellow bags and non clinical wastes are disposed of in black bags. Incinerators are used to burn all the combustibles at temperatures of 1300-1500 degree Centigrade. 

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Temporary hardness of water is due to the presence of the following salts of calcium and magnesium:

 # Temporary hardness of water is due to the presence of the following salts of calcium and magnesium:

A. Bicarbonates

B. Sulphates

C. Chlorides

D. Nitrates

The correct answer is A. Bicarbonates.

Temporary hardness of water is due to calcium and magnesium bicarbonates while permanent hardness is due to calcium and magnesium sulphates, chlorides and nitrates. 

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Waste water from kitchen is called:

 # Waste water from kitchen is called:

A. Sullage

B. Sewage

C. Garbage

D. Kitchen water

The correct answer is A. Sullage.

Garbage means discarded vegetable matter from the kitchen, canteens, etc.

Sullage refers to the fluid waste from a kitchen unmixed with excrements. 

Water sewage refers to waste water from household, industries, etc. containing human excreta. 

Refuse is all the solid and semisolid waste matters of a community EXCEPT excrements. 

 

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The point at which the chlorine demand of water is met is termed:

 # The point at which the chlorine demand of water is met is termed:

A. Break point

B. Back wash

C. Loss of head

D. Chlorine demand

The correct answer is A. Break Point.

Chlorine demand of the water is the difference between the amount of chlorine added to the water and the amount of residual chlorine remaining at the end of a specific period of contact at a given temperature and pH of water.

The minimum recommended concentration of free chlorine is 0.5 mg per liter for one hour and it should be present for a contact period of at least one hour to kill bacteria and viruses. 

The point at which chlorine demand of water is met is called break point. If further chlorine is added beyond the break point, free chlorine begins to appear in the water. 

The sum of the chlorine demand of the water plus the free residual chlorine of 0.5 mg per liter constitutes the correct dose of chlorine to be applied. 

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