Calorific value of fuel is expressed asSelect one:a.KCal / gmb.KCal/cmc.KCal cm-3d.Cal

Break Down the Problem

1. Identify the concept of calorific value of fuel.
2. Determine the units commonly used to express calorific value.

Relevant Concepts

1. Calorific Value: The amount of energy produced when a specific amount of fuel is burned.
2. Units of Measurement: Calorific value can be expressed in various units such as kilocalories (KCal), calories (Cal), grams (g), cubic centimeters (cm³), and cubic meters (cm³).

Analysis and Detail

1. KCal/g: This represents kilocalories per gram, indicating the energy content of a fuel per unit mass.
2. KCal/cm³: This indicates the energy content per unit volume, useful for liquids or gas fuels.
3. KCal cm⁻³: This is another way of representing kilocalories per cubic centimeter, equivalent to KCal/cm³.
4. Cal: This is a smaller unit of energy, representing the amount of energy required to raise 1 gram of water by 1°C.

Verify and Summarize

• The most common units for calorific value are KCal/g and KCal/cm³.
• Considering the context and relevance in fuel measurement, the expression of calorific value is most appropriately represented in terms of mass or volume.

Final Answer

The calorific value of fuel is expressed as KCal/g or KCal/cm³; the correct answer from the options provided, in a conventional context, is either a (KCal/g) or b (KCal/cm³).