81,The area of the regulator required for flow of a certain
quantity of air can be calculated from the formula is?,
PQ / 75,
K*S*Q2/A3,
0.385Q/sqrt(P),
none,
82,In a mine of high resistance the series arrangement of
fans gives a considerable increase in the quantity of air flowing is?,
10 %,
20
%,
30 %
40 %,
83,In a mine of high resistance the parallel arrangement
fans a considerable increase in the quantity of air flowing is?,
10 %,
20 %,
30
%,
negligible,
84,In a mine of medium resistance both series and parellel
arrangement of fans give the same result that the increase in the air quantity
is?
20 %,
30 %,
40 %,
50 %,
85,In a mine of low resistance the parellel arrangement of
the fans gives the increase in the air quantity by?,
20 %,
30 %
,40 %
,50 %,
Ans: 3, 3, 4, 1, 4
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