Related Questions

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
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
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
Pump priming should be resorted to at a time of?
A Inflation
B Deflation
C Stagflation
D Reflation
Priming of a centrifugal pump is done to
A Increase the mass flow rate of fluid
B Develop effective pressure rise by the pump
C Avoid chances of separation inside the impeller
D None of these
Self-priming centrifugal pump can be used for
A Booster service
B Pumping liquid fertilisers (e.g. liquid NH3)
C Pumping industrial wastes
D All of the above
A boat has a crack in its bull which is leaking water into the boat and could pump which can pump the water out in 8 hours . If the boat is 168 km away from the shore and the pump is running what is the minimum speed the boat should run at so that it can reach the shore before sinking?
A 5km./hour
B 6 km/hour
C 7 km/hour
D 8km/hour
Foaming and priming in boiler operation can be reduced by reduction in __________ in feed water.
A Turbidity
B Color (Hazen)
C Total solids
D All of the above
Priming consists of
A One part of white lead, 8 parts of chalk and four parts of twice boiled linseed oil
B 8 parts of white lead, one part of chalk and four parts of twice boiled linseed oil
C One part of white lead, 8 parts of chalk and one part of linseed oil
D None to these
Priming in a distillation column
A Results from very low gas velocity
B Is desirable from point efficiency consideration
C Is characterised by the presence of foam throughout the space between trays
D Reduces the overall pressure drop

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