Civil Engineering Mcqs

< 10

<12

> 12.5

4

Data Not Sufficient To Relate F1 & F2

F1 > F2

F1 = F2

F1 < F2

Bhp Required By The Pump

All A., And C.

Head Of The Liquid Pumped

Npsh Required

∞

1

0.5

0

Less Than

More Than

Not Related To

Equal To

0.62

0.82

0.42

0.98

None Of These

Solids

Any Liquid

Water

10 Psi, 19.7 Ft. Of Water, 23.3 Inches Of Hg

4.33 Psi, 10 Ft. Of Water, 20.7 Inches Of Hg

10 Psi, 19.7 Ft. Of Water, 5.3 Inches Of Hg

4.33 Psi, 10 Ft. Of Water, 8.83 Inches Of Hg

F-1l2t-1, Mlt-3

Ml-1t-3, F-1l2t

Flt, Ml-1t-1

Fl-2t, Ml-1t-1

Valve Is Closed In The Line

None Of These

Specified Mass Flow Rate Cannot Be Achieved

Restriction In Flow Cross-Section Area Occurs

For Unidirectional Flow

For Controlling Water Flow

In Bends

At High Pressure

Flow Of Liquid During Operation Of The Pump

All A., And C.

Discharge Pressure

Back Flow Of Fluid In The Event Of Stoppage Of Pump

None Of These

Unidirectional

Very Precise Control Of

Multidirectional

All A., And C.

Generally A Globe Valve

Provided In The Discharge Line

Provided To Prevent Liquid From Backing Up Through The Pump When The Pump Is Turned Off Or

B.H.P., Efficiency And Head

Head, Efficiency And B.H.P.

Efficiency, Head And B.H.P.

Efficiency, B.H.P. And Head

Run At A Lower Speed For The Same Discharge

Do Not Need Priming

Deliver Fluid With Pulsating/Fluctuating Discharge

Can Be Run With Discharge Line Valve Closed For A Short Interval

Impeller Blade Angle

Number Of Blades In Impeller

Type Of Casing

Rpm

Molten Sodium (Used As A Coolant In Fast Breeder Reactor)

Moderately Viscous Vegetable Oil Used In Soap Industry

None Of The Above

Thick Molten Soap At 80°C

Have Quieter Operation

Require Less Space

Have Lower Operating Costs

All A., And C.

Lies Above The Centroid Of The Plane Surface

Is Different For Different Fluids

Is At The Centroid Of The Plane Surface

Is Independent Of The Specific Weight Of The Fluid

At

Either Above Or Below; Depends On The Liquid Density

Below

Above

Greater Than

Equal To

Either More Or Less Than

Less Than

0.2 To 0.3

0.58 To 0.8

0.93 To 0.98

0.02 To 0.03

Equal To The Developed Head

Greater Than The Vapour Pressure Of The Liquid At That Temperature

Equal To The Vapour Pressure

Less Than The Vapour Pressure Of The Liquid At That Temperature

Develops Noise

Develops High Pressure

Increase In Thrust

Decrease In Effect