Question 215Steam Plants - Assistant Engineer
70% to passThe boiler shown in the illustration would be classed as________________. Illustration MO-0064

Aforced circulation, coil-type
Btwo-pass, scotch marine
Ctwo-pass, water-tube
Dsingle-pass, fire-tube, scotch marine
AI Explanation
The correct answer is D) single-pass, fire-tube, scotch marine. The illustration MO-0064 depicts a single-pass, fire-tube, scotch marine boiler. This type of boiler is characterized by the hot gases from the fire passing through the boiler tubes, heating the water surrounding the tubes in a single pass, before exiting the boiler. This design is commonly found on smaller vessels and is classified as a fire-tube boiler. The other options are incorrect because forced circulation, coil-type boilers have a different design, two-pass, scotch marine boilers have a different flow pattern, and two-pass, water-tube boilers use a different construction method.
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