41- Which one of the fuel burning in power plants given below emits less amount of carbon dioxide per unit electricity produced?
(A) Charcoal
(B) Diesel
(C) Coal
(D) Natural gas
42- Which one of the following control devices used effectively to control gaseous pollutants?
(A) Impingement
(B) Multiple cyclones
(C) Absorption spray tower
(D) Process boiler
43- Which of the mentioned devices are used for removing vapour phase/ gaseous pollutants?
(A) Absorption towers
(B) Catalytic converters
(C) Thermal oxidizers
(D) All of the above
44- The method or equipment best used to dispose of solid waste is _______.
(A) Rotary kiln incinerator
(B) Oxidation
(C) Wet scrubbers
(D) Electrostatic precipitators
45- Which one of the following is disease caused by PM on humans?
(A) COPP
(B) POCD
(C) COPD
(D) AQI
46- Out of the following, the only non-recording type of rain gauge is
(A) Weighing type
(B) Symon’s type
(C) Tipping bucket type
(D) None of these
47- Which one of the following gas in the atmosphere will increase the pH of rain water by reacting with it?
(A) Nitrogen oxides
(B) Carbon dioxide
(C) Sulphur dioxide
(D) Ammonia
48- The ability of solutes in water to neutralize added strong acid is called _______.
(A) Hardness
(B) Alkalinity
(C) Total dissolved solids
(D) Acidity
49- Electronic hazardous waste includes _______
(A) Lead, Mercury, Carbon and Cadmium
(B) Lead, Mercury, hexavalent chromium and Methane
(C) Lead, Mercury, hexavalent chromium and Cadmium
(D) Lead, Mercury, trivalent chromium and Cadmium
50- A significant natural source of radionuclides in the atmosphere is _______.
(A) Molybdenum
(B) Radon
(C) Plutonium
(D) Uranium
ANSWERS:
41-(D), 42-(C), 43-(D), 44-(A), 45-(C), 46-(B), 47-(D), 48-(B), 49-(C), 50-(B)