Related Questions

Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is?
ক Centrifugal pump
খ Pneumatic ejector
গ Reciprocating pump
ঘ None of these
2 large and 1 small pumps can fill a water tank in 4 hours. 1 large and 3 small pumps can also fill the same water tank in 4 hours . How many hours will it take for 3 large 4 small pumps to fill the tank?
ক 2 hours
খ 2.5 hours
গ 3 hours
ঘ 3.5 hours
2 large and 1 small pumps can fill a water tank in 4 hours. One large and 3 small pumps can also fill the same water tank in 4 hours. how many hours will it take for 3 large and 4 small pumps to fill the tank?
ক 2 hours
খ 2.5 hours
গ 3 hours
ঘ 3.5 hours
The cost of manufacturing x water pumps is Tk.9000+400x. The amount received by selling these x water pumps is Tk. 500x. What is the least number of water pumps that must be manufactured and sold so that that the amount recieved is at least equal to the manufacturing cost ?
ক 50
খ 60
গ 90
ঘ 100
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.) 
ক 2.54 × 104 J
খ 1.44 × 104 J
গ 2.34×104 J
ঘ 1.54 × 104 J
ঙ 1.54 ×104 J
Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have
ক Very low speeds
খ Smaller discharge
গ Higher capital &maintenance cost
ঘ High vibrations
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?
ক 72
খ 75
গ 84
ঘ 96
A centrifugal pump designed to pump water is employed to pump a more viscous oil. In the later case, the pump
ক Develops a lower head
খ Capacity is reduced
গ Requires more power
ঘ All of the above
Clogging of sewers, is caused due to
ক Silting
খ Low discharge
গ Greasy and oily matters
ঘ All the above
If 18 pumps can raise 2170 tonnes of water in 10 days , working 7 hours a day ; in how many days will 16 pumps raise 1736 tonnes of water , working 9 hours a day ?
ক 6
খ 7
গ 8
ঘ 9

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