Railways
NTPC (Technical Ability)
Instrument Mechanical
Question Bank
Instrument Mechanical
question_answer
A centrifugal pump was manufactured to couple directly to a 15 HP. electric motor running at 1950 rpm delivering 50 liters per minute against a total head of 20 m. It is desired to replace the pump. The head developed by pump is likely to be:
A)41.4 m
B)29.6 m
C)20 m
D)9.5 m
Correct Answer:
C
Solution :
N = 1950 rpm, Q = 50 1 pm or \[50\times {{10}^{-\,3}}{{m}^{3}}/min,\] H = 20 m