A. Reduction in working efficiency of manpower
B. Fatigue
C. High breathing rate
D. All A., B. & C.
Related Mcqs:
- 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 - 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 - 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 - Presence of excess fluorine in water causes__________________?
A. Dental cavity
B. Tooth decay
C. Fluorosis
D. Respiratory disease - 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. - 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. - Fluorosis is caused due to the presence of excessive amount of ______________ in drinking water?
A. Mercury
B. Lead
C. Fluoride
D. Arsenic - 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 - 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 - 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
