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A mine ventilation system consists of two splits A and B with resistances of 0.8 Ns2m-8 and 3.2 Ns2m-8, respectively as shown in figure. Trunk airways have resistance of 0.2 Ns2m-8. The main mine fan is generating pressure of 500 Pa.
Mine Ventilation mcq question image
The air quantities in m3/s circulated in the splits A and B respectively are
A mine ventilation system consists of two splits A and B with resistances of 0.8 Ns2m-8 and 3.2 Ns2m-8, respectively as shown in figure. Trunk airways have resistance of 0.2 Ns2m-8. The main mine fan is generating pressure of 500 Pa.
Mine Ventilation mcq question image
The flows in the two splits are equalized by placing a booster fan in split B. Assume that the fan pressure does not change after installation of the booster fan. The size of the booster fan in Pa is
The main fan operating point of a ventilation system is shown in the figure below. If an NPV of 200 Pa assists the ventilation system, the resultant pressure (Pa) and quantity (m3) generated by the
Mine Ventilation mcq question image
Two splits A and B are ventilated from an intake airway. Resistances of the splits are 0.5 Ns2m-8 and 0.8 Ns2m-8 respectively. A regulator is placed in split B to maintain a flow of 15 m3/s and 10 m3/s in splits A and B respectively as shown in the figure. The size of the regulator in m2 is
Mine Ventilation mcq question image
The figure shows PV (pressure-volume) diagram of a mine ventilated by both natural means and an exhaust fan. The total ventilation energy is represented by
Mine Ventilation mcq question image
If two resistances are connected in series, then its equivalent resistance is 45 Ω and if the same resistances are connected in parallel, then its equivalent resistance is 10 Ω, What are the values of these resistances ?
While measuring average air velocity of air flowing through a circular duct using precise traversing with equal area method, the radii r1, r2 and r3, in mm, as shown in the figure of the three circles should be
Mine Ventilation mcq question image
Statements : All branches are flowers. All flowers are leaves.

Conclusions :
I. All branches are leaves.
II. All leaves are branches.
III. All flowers are branches.
IV. Some leaves are branches.
In a mine ventilation system, the resistances of two splits A and B are 0.5 Ns2m-8 and 2 Ns2m-8 respectively. Combined resistance of two shafts and trunk airways is 0.7 Ns2m-8. A quantity of 20 m3/s of air passes through split A. The total air power of the ventilation system in kW are
Two resistances of equal value, when connected in parallel, give an equivalent resistance of R. If these resistors are connected in series, the equivalent resistance will be