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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
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
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
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
The resistances of each branches KL, LM, MN, NK is R and that of LN is 1.414 R. the equivalent resistance between K and M is
Mine Ventilation mcq question image
Which of the following heart valves are mechanical valves? i. Ball Valve ii. Autograft Valve iii. Xenograft Valve iv. Single Leaflet Valve v. Homograft Valve vi. Bi leaflet Valves
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
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 function of positive crankcase ventilation (PCV) system is that it
In case of the positive crankcase ventilation system