If the head is doubled in & centrifugal pump, the power required will increase in the ratio of__________________?

Related Mcqs:

A reduction in thermal resistance during heat transfer does not occur in the___________________?

A. Convection heat transfer by stirring the fluid and cleaning the heating surface B. Conduction heat transfer by reduction in the material thickness and increase in the thermal conductivity C. Radiation heat transfer by increasing the temperature and reducing the emissivity D. None of these...

In practice, the compression ratio of compression-ignition (CI) engine ranges from ______________________?

A. 15 to 25 B. 5 to 10 C. 40 to 55 D. 60 to 70...

Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of _______________ gms of zinc per m2 of steel strip ?

A. 5-10 B. 1000-1500 C. 120-500 D. 1500-3000...

In TIG welding, thoriated tungsten electrodes are used, because it ____________________?

A. Has higher current carrying capacity B. Has better electron emissivity C. Is stronger than ordinary tungsten D. Is easy to prepare...

Which of the following is not a charge material for cupola ?

A. Limestone B. Iron scrap C. Iron ore D. Pig iron...