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

Concept Forced steam-jet draught: Steam jets are applied below the grate (ashpit) to force air through the fuel bed into the furnace. Induced steam-jet draught: Steam jets are applied in the uptake or chimney to induce flow by entrainment of flue gases. Identification Placement under the grate clearly indicates a forced steam-jet system. Final AnswerForced steam jet draught.

Home » Mechanical Engineering » Steam Boilers and Engines

Draught classification: steam jet below the grate in the ashpit A steam jet issues from a nozzle placed in the ashpit under the fire grate to move air through the fuel bed. Identify the type of steam-jet draught. Choose the correct term.

Difficulty: Easy

Induced steam jet draught
Chimney draught
Forced steam jet draught
None of these

Correct Answer: Forced steam jet draught

Explanation:

Concept

Forced steam-jet draught: Steam jets are applied below the grate (ashpit) to force air through the fuel bed into the furnace.
Induced steam-jet draught: Steam jets are applied in the uptake or chimney to induce flow by entrainment of flue gases.

Identification

Placement under the grate clearly indicates a forced steam-jet system.

Final AnswerForced steam jet draught.

← Previous Question Next Question→

More Questions from Steam Boilers and Engines

Boilers: identify the type when water circulation is driven by a centrifugal pump Circulation of water in the boiler is provided by a mechanical pump rather than by density difference or natural convection. Choose the correct boiler classification.
Cornish boiler: typical shell diameter range Recall the common dimensions used in a single-flue Cornish fire-tube boiler. Choose the correct diameter range for the boiler shell.
Boiler draught: source of natural draught Identify the device that produces natural draught for combustion air and flue gas movement in steam boilers. Choose the correct option.
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.
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.

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion