Solve this multiple-choice question and choose the correct option.

Home » Mechanical Engineering » Steam Boilers and Engines

Cochran vertical boiler: orientation of the fire tubes Cochran boiler is a vertical, multi-tubular fire-tube boiler. State the orientation of its fire tubes between the combustion chamber and the smoke box. Choose the correct option.

Difficulty: Easy

Vertical tubes
Horizontal tubes
Inclined tubes
Helical tubes

Correct Answer: Horizontal tubes

Explanation:

ConceptThe Cochran boiler has a vertical shell and horizontal fire tubes. Hot gases from the hemispherical furnace/combustion chamber pass through many small-diameter horizontal tubes to the smoke box, transferring heat to the surrounding water.

Final AnswerHorizontal tubes

← Previous Question Next Question→

More Questions from Steam Boilers and Engines

Connecting rod: functional role in a reciprocating engine Evaluate the statement: 'The function of a connecting rod is not to convert the piston's reciprocating motion into rotary motion.' Choose the correct truth value.
Flywheel: principal function in engines Identify the primary purpose of a flywheel in a reciprocating engine with cyclic torque fluctuations. Choose the correct option.
Cornish boiler geometry: flue tube diameter relative to shell In a single-flue Cornish boiler, state the typical ratio of flue tube diameter to shell diameter. Choose the correct proportion.
Willan's line (steam engine): straight-line relation Willan's line for a steam engine is an approximately straight-line plot between steam consumption per hour and which output measure? Choose the correct option.
Steam engine valve losses: initial cylinder pressure vs. boiler pressure At the beginning of the piston stroke, how does the cylinder steam pressure compare with the boiler pressure (considering throttling and valve losses)? Choose the correct relation.
Locomotive/marine boiler safety valve: commonly used type Select the safety valve type predominantly used on locomotive and marine boilers, where orientation and vibration demand a non-gravity mechanism. Choose the correct option.
Boiler power (boiler horsepower): choose the correct standard definition used in steam engineering. According to classic practice, boiler ‘‘power’’ is referenced to a fixed rate of evaporation ‘‘from and at 100°C’’ (dry saturated steam). Select the definition that correctly states boiler power (BHP).
Uniflow (uniflow-scavenged) steam engine: identify the correct flow path of steam through the cylinder. Definition focus: where admission occurs and where exhaust leaves in a unidirectional flow pattern for better thermal efficiency. Choose the correct statement about steam entry and exhaust in a uniflow engine.
Cut-off governing of steam engines: what parameter is varied to control output? Context: In cut-off governing, the point of admission is altered while speed/load change, without throttling the inlet pressure. Choose what is actually controlled under cut-off governing.
Boiler type for fluctuating steam demand: identify the most suitable option. Context: Rapid changes in steam load require boilers that respond quickly and handle variable draught and firing conditions. Choose the boiler best suited to fluctuating steam demand.

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion