6411. Major loss in sudden contraction in pipe flow is due to
Boundary friction
Flow contraction
Expansion of flow after sudden contraction
None of these
✅ The correct answer is option B.
Chemical Engineering
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6412. For ideally incompressible fluid, the Mach number will be
1.5
1
0
5
✅ The correct answer is option B.
6413. With increase in the schedule number of a pipe of a particular nominal size, the
Wall thickness also increases
I.of the pipe decreases
O.of the pipe remains constant
All of the above
✅ The correct answer is option D.
6414. Gear pump
Is a positive displacement pump
Is a centrifugal pump
Is a non-positive displacement pump
Can be started with delivery valve closed
✅ The correct answer is option A.
6415. Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).
H
12.6 H
13.6 H
14.6 H
✅ The correct answer is option B.
6416. When larger particles e.g., grains are subjected to fluidisation, the corresponding bed produced is termed as the __________ bed.
Spouted
Sluggish
Boiling
Teeter
✅ The correct answer is option A.
6417. Which of the following is used for pumping crude oil from oil well?
Single stage centrifugal pump
Gear pump
Screw pump
Duplex/triplex reciprocating pump
✅ The correct answer is option D.
6418. Which of the following two quantities when same, makes one pipe system equivalent to another pipe system?
Head & discharge
Length & discharge
Length & diameter
Friction factor & diameter
✅ The correct answer is option A.
6419. Which of the following produces maximum pressure difference for transportation of gases?
Vaccum pumps
Blowers
Fans
Compressors
✅ The correct answer is option D.
6420. Cp/Cv is termed as
Adiabatic constant
Mach number
Weber number
Prandtl number
✅ The correct answer is option A.