Q111
In a mine between upcast shaft and downcast shaft, two airways are connected in parallel and their resistances are 100 and 120 Ns-2m-8 respectively. The resistance of upcast shaft, downcast shaft and the fan drifts are 10, 20, and 5 Ns-2m-8 respectively. The fan drift air pressure is 15 MN/m2. The rate of airflow through the mine in m3
A.
4.16
B.
18.26
C.
240.35
D.
333.33
E.
490.56
AnswerAnswer: Option E
Solution
Answer: Option E
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