এনভায়রনমেন্টাল ইঞ্জিনিয়ারিং MCQ
সিভিল ইঞ্জিনিয়ারিং এ চাকরি প্রস্তুতির জন্য "এনভায়রনমেন্টাল ইঞ্জিনিয়ারিং" সাবজেক্টের সকল MCQ এই ফোল্ডারে পাবেন। Civil Engineering এর চাকরি নিয়োগ, রেজাল্ট, সাজেশন, অনলাইন ক্লাসের জন্য আমাদের App: Engineering Classroom গুগল প্লে-স্টোর থেকে ডাউনলোড করে নিন। Environmental MCQ
41. The water bearing strata i.e. layers of sand, gravel etc. is called-
an aquifer
zone of saturation
an aquifuge
an aquiclude
42. The max" permissible total solid content in water for domestic purposes should not exceed-
300 ppm
400 ppm
500 ppm
1000 ppm
43. The open wells or dug wells are also known as-
shallow wells
percolation wells
draw wells
all of these
44. The maximum permissible turbidity for domestic supplies, on silica scale is-
5 to 10 ppm
20 to 30 ppm
10 to 20 ppm
30 to 40 ppm
45. Suspended impurities consist of-
iron
bacteria
chlorine
all of these
46. The most common cause of acidity in water is-
hydrogen
carbon dioxide
oxygen
all of theese
47. The pH value of water for public supplies is limited from-
2.5 to 6.5
8 to 10.5
6.5 to 8.5
10.5 to 15
48. The presence of hydrogen sulphide in water causes-
softening
acidity
alkalinity
bad taste
49. The design period for a water supply project is taken as-
5 to 10 years
15 to 20 years
10 to 15 years
20 to 30 years
50. The quality of tube well water is ---as compaired to surface water
good
poor
51. The maximum permissible colour for domestic supplies, on platinum cobalt scale is-
5 to 10 ppm
10 to 20 ppm
20 to 30 ppm
30 to 40 ppm
52. The groundwater is generally free from impurities.
suspended
dissolved
53. The maximum permissible temperature for domestic supply is-
5 to 10°C
10 to 15°C
15 to 20°C
20 to 25°C
54. The most important source of water for public water supply is-
lake
pond
river
sea
55. When the pH value of water is more than 7, it represents--- water.
neutral
alkaline
acidic
solt
56. The total count of bacteria per cubic centimeter for domestic purposes varies from-
0 to 100
150 to 200
100 to 150
200 to 250
57. The presence of bacteria in water causes-
hardness
diseases
alkalinity
bad taste
58. The maximum acidity in water will occur at a pH value of-
0
7
2
14
59. pH value is a symbol for ---concentration.
magnesium
hydrogen
calcium
sodium
60. Sphere shaped bacteria are called-
spirilla
cocci
bacilli
trichobacteria