Question Bank • QB_DFE_EXP_084 NAT • 2 Marks

Section 7: Dairy and Food Engineering

Preservation of Food

Subtopic: Preservation of food by cooling and freezing

Question Statement:

Calculate the latent heat that must be extracted to freeze $50\text{ kg}$ of free water present in food in $\text{MJ}$. (Latent heat of fusion of water is $333.2\text{ kJ/kg}$)

Answer Key:

16.66

Step-by-Step Solution & Explanation

$Q = m \times \lambda = 50\text{ kg} \times 333.2\text{ kJ/kg} = 16660\text{ kJ} = 16.66\text{ MJ}$
← Previous (QB_DFE_PF_016) Next (QB_DFE_PF_017) →

Practice In Authentic CBT Exam Interface

Test your skills under authentic timed conditions with live scoring and AIR percentile ranking.

Launch CBT Mock Test