Thermal pollution due to excessive heat & temperature in the working place causes__________________?

Related Mcqs:

1. The following heat engine produces power of 100,000 kW. The heat engine operates between 800 K and 300 K. It has a thermal efficiency equal to 50% of that of the Carnot engine for the same temperature. The rate at which heat is absorbed from the hot reservoir is____________________?

   A. 100,000 kW B. 160,000 kW C. 200,000 kW D. 320,000 kW...

2. Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of _____________ present in it?

   A. Coal ash B. Potassium cyanide C. Ortho-xylene D. None of these...

3. Insufficient washing of sand grains in a rapid sand filter causes__________________?

   A. Air binding B. Shrinkage of filtering media C. Mud balls D. Expansion of filtering media...

4. Presence of excess fluorine in water causes__________________?

   A. Dental cavity B. Tooth decay C. Fluorosis D. Respiratory disease...

5. A man exposed to excessive noise level in the working environment may suffer from____________________?

   A. Hearing loss B. Rupture of ear drum C. Nervousness & fatigue D. All A., B. & C....

6. Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes__________________?

   A. Blood poisoning B. Anaemia C. Nervous system disorder D. All A., B. & C....

7. Fluorosis is caused due to the presence of excessive amount of ______________ in drinking water?

   A. Mercury B. Lead C. Fluoride D. Arsenic...

8. Efficiency of a heat engine working on Carnot cycle between two temperature levels depends upon the__________________?

   A. Two temperatures only B. Pressure of working fluid C. Mass of the working fluid D. Mass and pressure both of the working fluid...

9. If the molar heat capacities (Cp or Cv) of the reactants and products of a chemical reaction are identical, then, with the increase in temperature, the heat of reaction will___________________?

   A. Increase B. Decrease C. Remain unaltered D. Increase or decrease; depends on the particular reaction...

10. A solid metallic block weighing 5 kg has an initial temperature of 500°C. 40 kg of water initially at 25°C is contained in a perfectly insulated tank. The metallic block is brought into contact with water. Both of them come to equilibrium. Specific heat of block material is 0.4 kJ.kg-1. K-1. Ignoring the effect of expansion and contraction and also the heat capacity to tank, the total entropy change in kJ.kg-1, K-1 is_________________?

    A. -1.87 B. 0 C. 1.26 D. 3.91...