The cylindrical shell of a Lancashire boiler has diameter from

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

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

The diameter of internal flue tubes of a Lancashire boiler is about _________ that of its shell.

A

One-fourth

B

One-third

C

Two-fifth

D

One-half

Which of the following statement indicates the difference between Cornish boiler and Lancashire boiler?

A

Cornish boiler is a water tube boiler whereas Lancashire boiler is a fire tube boiler

B

Cornish boiler is a fire tube boiler whereas Lancashire boiler is a water tube boiler

C

Cornish boiler has one flue tube whereas Lancashire boiler has two flue tubes

D

Cornish boiler has two flue tubes whereas Lancashire boiler has one flue tube

The difference between Cornish boiler and Lancashire boiler is that

A

Former is fire tube type and latter is water tube type boiler

B

Former is water tube type and latter is fire tube type

C

Former contains one fire tube and latter contains two fire tubes

D

None of the above

The diameter of a cylindrical shell of a Scotch marine boiler varies from

A

1.5 to 2 m

B

2.5 to 3.5 m

C

3.5 to 4.5 m

D

None of these

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

$$\frac{{{\text{pd}}}}{{6{\text{t}}}}$$

Lancashire boiler has __________ internal flue tubes.

A

One

B

Two

C

Three

D

Four

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

$$\frac{{{\text{pd}}}}{{4{\sigma _{\text{t}}}}}$$

The cylindrical shell of a Lancashire boiler has diameter from

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