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
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
__________ treatment is done for appreciable improvement in viscosity index of lubricating oil.
A Acid
B Solvent extraction
C Alkali
D Clay
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
Crude oil is pumped by a __________ pump.
A Gear
B Centrifugal
C Screw
D Reciprocating
Viscosity index of a lubricating oil
A Is the measure of its flash point
B Is the measure of variation of viscosity with temperature
C Should be low
D None of these
Higher viscosity of lubricating oil usually signifies
A Lower Reid vapour pressure
B Higher acid number
C Higher flash point and fire point
D Lower flash point and fire point
After the increase of price of oil by 40%, a family decided to reduce its oil consumption so that the expenditure for oil goes up by 26% only. If the total consumption of oil before the price rise was 10 kg per month, then what is the current consumption of oil per month (in kg)?
A 8
B 8.50
C 9
D None of these
Which is the correct relationship for a centrifugal pump? (where, D = Impeller diameter, inches H = Head developed, ft of liquid pumped N = Speed of pump, rpm)
A D = 1840 H0.5/N
B D = 1840 N/H0.5
C H = 1840 D0.5/N
D D = 1840 H/N
Slurries can be most conveniently pumped by a __________ pump.
A Screw
B Reciprocating
C Gear
D Centrifugal

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