Related Questions

According to fan laws, for fans having constant wheel diameter, the pressure varies
A Directly as fan speed
B Square of fan speed
C Cube of fan speed
D Square root of fan speed
According to fan laws, for the fans having constant wheel diameters, the power demand varies
A Directly as fan speed
B Square of fan speed
C Cube of fan speed
D Square root of fan speed
Power requirement of fans having constant wheel diameter varies __________ fan speed.
A As square of
B Directly as
C As cube of
D None of these
A circular wheel 28 inches in diameter rotates the same number of inches per second as a circular wheel 35 inches in diameter. If the smaller wheel makes x revolutions per second, how many revolutions per minutes does the larger wheel make in terms of x?
A 12x
B 24x
C 36x
D 48x
A circular wheel 28 inches in diameter rotates (moves) the same number of inches per second as a circular wheel 35 inches in diameter. If the smaller wheel makes x revolutions per second, how many revolutions per minute does the larger wheel make in terms of x?
A 12x
B 48x
C 24x
D 36x
According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary
A Directly as the air or gas density
B Inversely as square root of density
C Inversely as density
D As square of density
Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan
A With greater number of blades
B Of increased diameter
C Both A & B
D Neither A nor B
According to fan laws, at constant speed and capacity, the pressure and power vary
A Directly as the air or gas density
B Inversely as square root of density
C Inversely as density
D As square of density
According to fan laws, at constant pressure, the speed capacity and power vary
A Directly as the air or gas density
B Inversely as square root of density
C Inversely as density
D As square of density
A wheel that has 6 cogs is meshed with a wheel of 14 cogs. When the smaller wheel has made 21 revolutions the number of revelution made by the larger wheel is --
A 4
B 9
C 12
D 49

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