6551. Viscosity of water is about __________ times that of air at room temperature.
15
55
155
1050
✅ The correct answer is option B.
Chemical Engineering
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6552. Pick out the correct statement pertaining to the flow through a converging-diverging tube.
The value of Mach number is always unity at the throat
No shock wave develops in the tube when the Mach number at exit is greater than unity
Throughout the converging portion of the tube, the density increases in the downstream direction
None of these
✅ The correct answer is option B.
6553. Pascal’s law is valid, only when the fluid is
Frictionless and at rest
At rest
At rest and when the frictionless fluid is in motion
None of these
✅ The correct answer is option B.
6554. The nominal size of a hose pipe is specified by its
I.D.
O.D.
Thickness
None of these
✅ The correct answer is option A.
6555. In case of a __________ the energy of flow is considerably decreased downstream of the machine.
Blower
Turbine
Centrifugal pump
Centrifugal fan
✅ The correct answer is option B.
6556. For turbulent flow of an incompressible fluid through a pipe, the flow rate Q is proportional to (Δ P)n, where ΔP is the pressure drop. The value of exponent ‘n’ is
1
0
< 1
> 1
✅ The correct answer is option C.
6557. For the transfer of solution of thick slurry, the pump used is a __________ pump.
Reciprocating
Gear
Diaphragm
Centrifugal
✅ The correct answer is option C.
6558. Acceleration head in a reciprocating pump
Increases the work done during delivery stroke
Decreases the work done during suction stroke
Does not change the work requirement of the pump
Increases the work done during suction stroke
✅ The correct answer is option C.
6559. Steady uniform flow is represented by flow through a/an
Long pipe at constant rate
Long pipe at decreasing rate
Expanding tube at constant rate
None of these
✅ The correct answer is option A.
6560. Working principle of manometer comprises of balancing a coloumn of liquid against the pressure to be measured. Inclined tube manometer is especially used for the measurement of __________ pressure.
Small differential
Atmospheric
Absolute
Gage
✅ The correct answer is option A.