- Directly proportional to N
- Inversely proportional to N
- Directly proportional to N²
- Inversely proportional to N²
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A centrifugal pump will start delivering liquid only when the pressure rise in the impeller is equal to the?
Answer: Option 3 Let'
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In centrifugal pumps, cavitation occurs, when pressure of the impeller eye or vane becomes?
Answer: Option 3 Let'
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Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)?
Answer: Option 2 Let'
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The discharge of a double acting reciprocating pump is (where L = Length of stroke, A = Cross-sectional area of piston, and N = Speed of crank in r.p.m.)?
Answer: Option 4 Let'
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The discharge through a small rectangular orifice is given by (where Cd = Coefficient of discharge for the orifice, a = Cross-sectional area of the orifice, h = Height of the liquid above the centre of the orifice)?
Answer: Option 1 Let'
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Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet)?
Answer: Option 3 Let'
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The percentage slip in a reciprocating pump set is given by the % of (where, Q₁ = actual discharge Q₂ = theoretical discharge)?
Answer: Option 4 Let'
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Co-efficient of discharge (Cd) is defined as actual discharge/theoretical discharge and is equal to Cc . Cv; where Cc = Co-efficient of contraction and Cv = co-efficient of velocity. Cd of an orifice is usually about?
Answer: Option 2 Let'
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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)?
Answer: Option 1 Let'
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The process, which causes the air to enter the impeller blades of a centrifugal compressor at ________ velocity (without effecting the mass of air to flow and velocity of flow) is known as prewhirl.?
Answer: Option 1 The process, which causes the air to enter the impeller blades of a centrifugal compressor at reduced velocity (without effecting the mass of air to flow and...
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