A. directly as the air or gas density
B. inversely as square root of density
C. inversely as density
D. as square of density
E. as square root of density
Related Mcqs:
- 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
E. as square root of density - 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
E. as square root of density - 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
E. none 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
E. none of the above - 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
E. none of the above - In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by_______________?
A. designing new impeller
B. trimming the impeller size to the required size by machining
C. not possible
D. some other alterations in the impeller
E. none of the above - The specific speed of turbine is defined as the speed of a unit___________________?
A. of such a size that it delivers unit dis-charge at unit head
B. of such a size that it delivers unit dis-charge at unit power
C. of such a size that it requires unit power per unit head
D. of such a size that it produces unit horse power with unit head
E. none of the above - Pressure intensifier increases the pressure in proportion to____________________?
A. ratio of diameters
B. square of ratio of diameters
C. inverse ratio of diameters
D. square of inverse ratio of diameters
E. fourth power of ratio of diameters - Medium specific speed of a pump implies it is_________________?
A. centrifugal pump
B. mixed flow pump
C. axial flow pump
D. any one of the above
E. none of the above - Specific speed for reaction turbines ranges from___________________?
A. 0 to 4.5
B. 10 to 100
C. 80 to 200
D. 250 to 300
E. none of the above
