cExams.net
Test # 21


1.
Microbial fuel cells are considered a source of sustainable energy. Why ?
1. They use living organisms as catalysts to generate electricity from certain substrates.
2. They use a variety of inorganic materials as substrates.
3. They can be installed in waste water treatment plants to cleanse water and produce electricity.
Which of the following statements given above is/ are correct ?

Login/Register to access massive collection of FREE questions and answers.
Login/Register

gk11
Quiz Index
1100 questions in 110 tests. Each test contains 10 questions.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110

The nickname for a Japanese businessmen is Salarymen.      .. More >>

united states army special forces:
n.
1.a division of the United States Army that is specially trained for guerilla fighting      .. More >>
  • Bhai Dooj Celebration
  • Precautions while using Overhead Projectors
  • Most Expensive Yachts Ever Built
  • Handprint Crafts
  • Cure for Lice
  • Saffron Or Kesar Get Beautiful Skin

  • Daily Health Tips

    Vitamin D the "Sunshine Vitamin"

    For healthy bones, ensure an adequate supply of vitamin D. Vitamin D is necessary for proper bone and teeth formation and for the healthy functioning of the thyroid gland. It assists in the assimilation of calcium, phosphorus and other minerals from the digestive tract. This vitamin is found in the rays of the sun, fish, milk, eggs, butter and sprouted seeds. A deficiency can cause gross deformation of bones and severe tooth decay. The recommended daily allowance of this vitamin for both adults and children is 400 to 500 international units. Therapeutically, up to 4,000 to 5,000 units a day for adult or half of this for children, is a safe dose, if taken for not longer than one month. It is beneficial in the treatment of muscular fatigue, constipation and nervousness. It can be toxic if taken in excessive doses, especially for children. Signs of toxicity are unusual thirst, sore eyes, itching skin, vomiting, diarrhoea, urinary urgency, abnormal calcium deposits in blood vessel walls, liver, lungs, kidneys and stomach.


    Chourishi Systems