Related Questions

In case of a shell and tube heat exchanger, the minimum shell thickness for carbon steel (inclusive of corrosion allowance) depends on shell diameter and is in the range of __________ mm.
A 3-5
B 5-11
C 8-15
D 12-18
Slope of countercurrent flow rotary drier is in the range of __________ meter/metre.
A 0 to 0.08
B 0 to 0.8
C 0 to 1.5
D 0 to 2.2
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If $${\sigma _{\text{t}}}$$ is the tensile stress for the shell material, then thickness of shell is equal to
A $$\frac{{{\text{pd}}}}{{{\sigma _{\text{t}}}}}$$
B $$\frac{{{\text{pd}}}}{{2{\sigma _{\text{t}}}}}$$
C $$\frac{{{\text{pd}}}}{{3{\sigma _{\text{t}}}}}$$
D $$\frac{{{\text{pd}}}}{{4{\sigma _{\text{t}}}}}$$
For a cylindrical shell, (subject to the thickness of uppermost course being more than the minimum for diaofthe tank in question), the thickness of the courses of shell
A Decreases upwards
B Increases upwards
C Remains same throughout
D May decrease or increase upwards depending upon whether vacuum or positive pressure would be maintained inside the shell
Hold up of material in a operating rotary drier is in the range of
A 0.05 to 0.15
B 0.25 to 0.50
C 0.5 to 0.8
D 0.8 to 0.9
Height of the flights in the rotary drier is in the range of
A 0.08 to 0.12 d
B 0.02 to 0.05 d
C 0.2 to 0.5 d
D 0.5 to 0.6 d
For a cylinderical internally pressurised vessel, which of the following closure types would withstand highest pressure, if each closure is of the same material and thickness?
A Hemispherical
B Ellipsoidal (2 : 1)
C Conical
D Flat plate
For a given ambient air temperature with increase in the thickness of insulation of a hot cylinderical pipe, the rate of heat loss from the surface would
A Decrease
B Increase
C First decrease and then increase
D First increase and then decrease
The ends of a cylinderical vessel can be closed by a head, which can be one of the four shapes. For the same thickness, choose the one which can withstand the highest pressure.
A Flat plate
B Hemispherical
C Torispherical
D Ellipsoidal
In a shell and tube heat exchanger, putting a longitudinal baffle across the shell, forces the shell side fluid to pass __________ through the heat exchanger.
A Once
B Twice
C Thrice
D Four times

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