Related Questions

The fire tubes in a Scotch marine boiler are
A Horizontal
B Vertical
C Inclined
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 cylindrical shell of diameter (d), length ($$l$$) and thickness (t) is subjected to an internal pressure (p). The hoop stress in the shell is
A $$\frac{{{\text{pd}}}}{{\text{t}}}$$
B $$\frac{{{\text{pd}}}}{{2{\text{t}}}}$$
C $$\frac{{{\text{pd}}}}{{4{\text{t}}}}$$
D $$\frac{{{\text{pd}}}}{{6{\text{t}}}}$$
A thin cylindrical shell of diameter (d) length ($$l$$) and thickness (t) is subjected to an internal pressure (p). The longitudinal stress in the shell is
A $$\frac{{{\text{pd}}}}{{\text{t}}}$$
B $$\frac{{{\text{pd}}}}{{2{\text{t}}}}$$
C $$\frac{{{\text{pd}}}}{{4{\text{t}}}}$$
D $$\frac{{{\text{pd}}}}{{6{\text{t}}}}$$
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 $$\frac{{{\text{pd}}}}{{4{\sigma _{\text{t}}}}}$$
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
নয়টি বেলনাকৃতির তার, যাদের প্রতিটির ব্যাস d ও দৈর্ঘ্য L, একত্রে শ্রেণি সজ্জায় সংযুক্ত আছে। সজ্জাটির রোধ যদি একটি L দৈর্ঘ্যের বেলনাকৃতির তারের রোধের সমান হয়, তবে তারটির ব্যাস কত? (Nine cylindrical wires each of diameter d and length L are connected in series. If the resistance of the connection is equal to the resistance of another cylindrical wire of length L, then what is the diameter of the wire?)
A 3d
B 9d
C d3
D d9
A _________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.
A Blow off cock
B Fusible plug
C Stop valve
D Safety valve
Normally, the plate thickness of the bottoms and roofs of vertically cylindrical storage vessels as compared to that of the cylindrical shell is
A More
B Less
C Same
D More or less depending upon the pressure & temperature inside the vessel and the nature of the fluid contained therein

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