Related Questions

According to fan laws, for fans having constant wheel diameter, the air or gas capacity varies
A Directly as fan speed
B Square of fan speed
C Cube of fan speed
D Square root of fan speed
The capacity of induced draft fan compared to forced draft fan in a boiler is
A Same
B More
C Less
D Less or more depending on size of boiler
For the same draught produced the power of induced draught fan as compared to forced draught fan is
A less
B more
C same
D not predictable
If a man reduces the selling price of a fan from Tk. 400 to Tk. 380, his loss increases by 2%. The cost price of the fan is:
A Tk.480
B Tk.600
C Tk. 1000
D Tk. 1060
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
Consider a centrifugal pump having a specific impeller diameter, fixed impeller speed pumping a liquid of constant density at a particular discharge capacity. With decrease in the capacity of the pump, the __________ decreases.
A NPSH required
B BHP required by the pump
C Head of the liquid pumped
D All of the above
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
If A varies directly proportional to C and B also varies directly proportional to C, which one of the following is not correct ?
A $$\left( {A + B} \right)\alpha \,C$$
B $$\left( {A - B} \right)\alpha \,\frac{1}{C}$$
C $$\sqrt {AB} \,\alpha \,C$$
D $$\frac{A}{B} = {\text{constant}}$$

Next steps