Boiler performance terminology: The quantity of water evaporated (or steam generated) in kilograms per kilogram of fuel fired is called the evaporation ratio. State whether the statement “This is known as the power of a boiler” is correct.

Introduction:
Boiler performance uses several distinct terms: evaporation ratio (kg steam per kg fuel), equivalent evaporation (from and at 100°C), boiler efficiency, and boiler power (or capacity). Confusing these definitions can lead to serious errors in design and reporting.

Given Data / Assumptions:

• Evaporation ratio ER = kg of steam produced per kg of fuel fired.
• Boiler power/capacity normally stated as mass flow of steam (e.g., kg/s, t/h) or heat release rate.
• Standard conditions may define “equivalent evaporation” but not “power”.

Concept / Approach:
The statement equates evaporation ratio with “power of a boiler,” which is incorrect. Evaporation ratio is a specific output per unit fuel input, essentially a measure akin to efficiency influence. Boiler power refers to the absolute output rate (steam generation rate or thermal duty), not normalized by fuel mass.

Step-by-Step Solution:
1) Define ER = (mass of steam produced) / (mass of fuel fired).2) Define boiler power/capacity = mass flow rate of steam (e.g., t/h) or equivalent thermal duty.3) Note that ER is dimensionless; power has dimensions (kg/s or kW).4) Hence, calling ER the “power of a boiler” is false.

Verification / Alternative check:
Test sheets list ER separately from capacity; improving efficiency raises ER but does not change the name of the metric to “power”.

Why Other Options Are Wrong:
Conditional “True” statements confuse ER with equivalent evaporation or specific conditions; none make ER equal to “power”.

Common Pitfalls:
Using ER to compare boilers of different sizes; ER does not reveal absolute production capability.

Final Answer:
False