General Science QUESTIONS AND ANSWERS

General Knowledge : General Science QUESTIONS AND ANSWERS :: part13 : 81 to 85

Following General Knowledge Multiple choice objective type questions and answers will help you in TRB, SSC and UPSC 2024 examinations :

81.Water is a highly effective coolant for a car engine because

water boils at a comparatively high temperature.

water is a good conductor of heat.

evaporation of water produces lot of cooling.

water has very high specific heat capacity.

82.White coal is

uranium

ice

hydro-electricity

diamond

83.A piece of wood is floating in water. If we heat the water, the piece of wood will

increase in size

rise a little

float at the same level

sink a little

84.Food remains unspoilt in a refrigerator for a longer time because

the antibiotice inside a refrigerator kill bacteria and fungus.

the low temperature inside males the food shrink and thereby crush the germs.

Bacteria and fungus can not multiply fast at sufficiently low temperatures.

Refrigerator contains food preservatives that get activated at low temperatures.

85.Frequency modulation is preferred over amplitude modulation because

it improves the quality of signals.

it provides a method of transmission free from static interferences.

the amplitude of a carrier wave can be modulated.

it minimises the expenditure.

More General Science QUESTIONS AND ANSWERS available in next pages

Health is the greatest gift, contentment is the greatest wealth -Buddha

The only place where success comes before work is in the dictionary.- Vidal Sassoon

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