Question

Arrange the following statements :
• [A.] Pulverized fuel is injected into the furnace
• [B.] Chemical Energy converted into thermal Energy
• [C.] High temperature gases transfer heat to boiler tubes
• [D.] Water undergoes phase change into superheated steam
• [E.] Steam energy is delivered to turbine blades Choose the correct answer from the options given below :

• A. A, B, C, D, E
• B. A, C, D, E, B
• C. A, D, B, E, C
• D. A, E, C, B, D

Hint:

Thermal plant sequence: \[ \text{Fuel} \rightarrow \text{Combustion} \rightarrow \text{Heat Transfer} \rightarrow \text{Steam Generation} \rightarrow \text{Turbine} \]

Answer 1

The Correct Option is A

Concept: In a thermal power plant, energy conversion takes place in a systematic sequence. The process begins with: \[ \text{Fuel combustion} \] and finally steam energy drives the turbine. To arrange correctly, we follow actual physical operation inside the plant.

Step 1: Injection of pulverized fuel. Initially: \[ \text{Pulverized coal/fuel} \] is injected into the furnace. This improves:
• combustion efficiency,
• heat transfer,
• burning rate. Hence first step is: \[ A \]

Step 2: Conversion of chemical energy into thermal energy. After fuel injection, combustion occurs. Thus: \[ \text{Chemical Energy} \rightarrow \text{Thermal Energy} \] Therefore second step is: \[ B \]

Step 3: Heat transfer to boiler tubes. The hot combustion gases now transfer heat to: \[ \text{Boiler tubes} \] Hence: \[ C \] comes next.

Step 4: Conversion of water into superheated steam. Water absorbs heat and undergoes: \[ \text{phase transformation} \] forming: \[ \text{superheated steam} \] Therefore next step is: \[ D \]

Step 5: Steam drives turbine blades. Finally: \[ \text{Steam energy} \] is supplied to turbine blades. This converts thermal energy into mechanical energy. Hence last step is: \[ E \]

Step 6: Writing the correct arrangement. Therefore correct sequence is: \[ A,\ B,\ C,\ D,\ E \]

Step 7: Selecting the correct option. Hence correct option is: \[ \boxed{(1)} \]