Related Questions

The diameter of internal flue tubes in a Lancashire boiler compared to its shell is
A One-half
B One-third
C Two-fourth
D Two-fifth
Lancashire boiler has __________ internal flue tubes.
A One
B Two
C Three
D Four
The number of flue tubes in Lancashire boiler is
A Zero
B One
C Two
D Four
In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones ; because the smaller diameter tubes
A Are easier to clean
B Are less prone to fouling
C Can be fitted into a smaller shell diameter hence the cost of the heat exchanger would be less
D None of these
The cylindrical shell of a Lancashire boiler has diameter from
A 1 to 2 m
B 1.25 to 2.25 m
C 1.5 to 2.5 m
D 1.75 to 2.75 m
The diameter of cylindrical shell of the Lancashire boiler is of the order of
A 1 to 1.25 m
B 1 to 1.75 m
C 2 to 4 m
D 1.75 to 2.75 m
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 $$\frac{{{\text{pd}}}}{{4{\sigma _{\text{t}}}}}$$
Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?
A CO2
B N2
C O2
D CO
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If V is the storage capacity of shell, then its diameter will be
A $${\left( {\frac{{6{\text{V}}}}{\pi }} \right)^{\frac{1}{2}}}$$
B $${\left( {\frac{{6{\text{V}}}}{\pi }} \right)^{\frac{1}{3}}}$$
C $${\left( {\frac{{6{\text{V}}}}{\pi }} \right)^2}$$
D $${\left( {\frac{{6{\text{V}}}}{\pi }} \right)^3}$$
The diameter of flue tube in a Cornish boiler is _________ that of the shell.
A One-fourth
B One-third
C Two-fifth
D Three-fifth

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