Home » Mechanical Engineering » Steam Boilers and Engines

Boiler draught: primary objectives of producing draught List the functions served by draught in a steam generator, from air supply to gas discharge. Choose the correct option.

Difficulty: Easy

Provide adequate air for complete combustion of fuel
Exhaust hot gases from the combustion chamber
Discharge flue gases to the atmosphere via the chimney
All of the above

Correct Answer: All of the above

Explanation:

Concept
Draught (natural via chimney or mechanical via fans/steam jet) creates the pressure differential to:
• Supply sufficient combustion air, • Carry products of combustion through the passes, and • Discharge them safely to atmosphere.

Final Answer
All of the above

← Previous Question Next Question→

More Questions from Steam Boilers and Engines

Simple vertical and fire-tube boilers: identify the correct statement Evaluate each claim about space requirement, achievable steam pressure/quantity, and tube count in a simple vertical boiler. Choose the correct option.
Boiler components: function of the grate Confirm the definition of a grate located within the combustion chamber of a solid-fuel boiler (coal/wood). Choose the correct truth value.
Condensing plant: condensate temperature relative to cooling-water inlet In a surface condenser, compare the temperature of condensate leaving the condenser to that of the circulating water at inlet. Choose the correct relation.
Stationary land boilers: commonly used main safety valve type Select the safety valve design typically employed on stationary boilers, where orientation is fixed and compactness is less critical than reliability and constancy of set pressure. Choose the correct option.
LaMont boiler: identify whether the statement about type and circulation is correct. Statement: The LaMont boiler is a high-pressure, water-tube steam boiler that operates with forced circulation driven by a pump. Choose the correct option (True/False).
Economiser effect on boiler output: complete the sentence with the correct engineering impact. An economiser __________ the steam-raising capacity of a boiler by preheating the incoming feedwater using waste flue-gas heat. Choose the correct word to complete the statement.
Benson (once-through, supercritical) boiler: typical steaming capacity. Choose the approximate rate of steam production commonly associated with Benson boilers in standard references and exam data.
Benson boiler: average operating pressure range and representative value. Select the most commonly cited average operating pressure for a Benson boiler used in exam practice (options in bar).
Natural draught definition: verify the correctness of the statement. Statement: A draught produced by a chimney due to the density difference between hot gases inside the chimney and the colder outside air is called natural draught. Choose the correct option (True/False).
Aim of compounding in steam engines: identify the principal objective(s). Compounding splits the total expansion across multiple cylinders (HP→IP→LP) to improve performance. Choose the best statement describing the aim.

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion