Related Questions

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 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
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
In average work, the tolerance produced by investment casting method is
A ±0.05 mm
B +0.2 mm
C +05 mm
D +1 mm
In unilateral system of tolerance, the tolerance is allowed on
A Both sides of the actual size
B One side of the actual size
C One side of the nominal size
D Both sides of the nominal size
In a bilateral system of tolerance, the tolerance is allowed on
A One side of the actual size
B One side of the nominal size
C Both sides of the actual size
D Both sides of the nominal size
In a unilateral system of tolerance, the tolerance is allowed on
A One side of the actual size
B One side of the nominal size
C Both sides of the actual size
D Both sides of the nominal size
Which of the following special shell variables is used to process number of the current shell?
A $!
B $$
C $0
D $*
E None of the above
In a new production process, the number of units produced during the first week was 450. If the efficiency gradually increase so that 10 additional units can be produced each week, how many will be produced in the 10th week?
A 490
B 700
C 540
D 640
Plastic articles are normally produced by __________ moulding.
A Green sand
B Injection
C Shell
D Dry sand

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