Related Questions

A centrifugal pump designed to pump water is employed to pump a more viscous oil. In the later case, the pump
A Develops a lower head
B Capacity is reduced
C Requires more power
D All of the above
একটি পানিপূর্ণ কুয়ার গভীরতা 20m ও ব্যাস 2 m. কুয়াটিকে পানি শূণ্য করার জন্য 5 HP এর একটি পাম্প লাগানো হল। অর্ধেক পানি তোলার পর পাম্পটি নষ্ট হয়ে গেল। বাকি পানি তোলার জন্য একই ক্ষমতা সম্পন্ন আর একটি পাম্প লাগানো হল। প্রথম পাম্প দ্বারা সম্পাদিত কাজের পরিমান নির্ণয় কর।(The depth and diameter of a water filled well are 20 m and 2 m respectively. An engine of 5 HP is attached to pump out the water. The pump was ruined after emptying half of the water. Then another pump of same capacity was attached to pump out rest of the water. Determine the work done by first pump.) 
A 2.54 × 104 J
B 1.44 × 104 J
C 2.34×104 J
D 1.54 × 104 J
E 1.54 ×104 J
While starting a centrifugal pump, its delivery valve should be kept
A Opened
B Closed
C Either opened or closed ; it does not make any difference
D Either opened or closed; depending on the fluid viscosity
Axial flow pump is started with its delivery valve
A Kept fully closed
B Kept fully open
C Irrespective of any position
D Kept 50% open
Working alone, pump A can empty a pool in 3 hours. Working alone, pump B can empty the same pool in 2 hours. Working together, how many minutes will it take pump A and pump B to empty the pool?
A 72
B 75
C 84
D 96
While starting an axial flow pump, its delivery valve should be kept
A Open
B Closed
C Either open or closed
D None of these
For the same terminal conditions and valve size, the pressure drop in a fully opened globe valve as compared to that in a gate valve is
A More
B Less
C Equal
D Either A or B; depends on the viscosity of the fluid
Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the __________ head.
A Manometric
B Total
C Static
D Friction
The static head of a centrifugal pump is equal to the _________ of suction head and delivery head.
A Product
B Difference
C Sum
D None of these
Delivery head of a centrifugal pump is
A Directly proportional to N
B Inversely proportional to N
C Directly proportional to N2
D Inversely proportional to N2

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