41,If the wet bulb temparature exceeds 30.5 deg c at any place air current should be faster than ?,
1 m/s,2 m/s,3 m/s,0.5 m/s,
42,whirling hygrometer is rotated with a speed of?,
100 rpm,200 rpm,300 rpm,400 rpm,
43,The value of the kata factor is ?,250,300,380,480,
44,The unit for the kata factor is ?,
millicolories/sq.cm/sec,kcal/sec/sq.cm,millicolories/sq.cm,millicolories/sec/sq.cm,
45,The difference between the atmosphere pressure and the total pressure on the fan drift is called?
,Velocity pressure of surface fan,Static pressure,Total pressure of surface fan,none,
Ans; 1,2,4,3,3
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