Life Sciences
2019 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE XL 2019 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 124–125 of 125. Imported answers require review unless explicitly marked reviewed.
Question 19
Open questionXL-UNAT2 marksNeeds review
Room air is at 40 °C with 60% relative humidity. Saturated vapour pressure of water at 40 °C is 7.375 kPa. Humid volume of air (m³ per kg of dry air) is ____________ (round off to 3 decimal places).
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 20
Open questionXL-UNAT2 marksNeeds review
Freezing of 100 mm spherical meat ball with 60% moisture at 35 °C is being done in an air blast freezer maintained at -45 °C. Given, latent heat of fusion for water is 333.2 kJ kg⁻¹, thermal conductivity of meat is 1.5 W m⁻¹ °C⁻¹, convective heat transfer coefficient is 40 W m⁻² °C⁻¹, density of frozen meat is 980 kg m⁻³ and initial freezing temperature of meat ball is -10 °C. Using Plank’s equation, freezing time (h) is ____________ (round off to 2 decimal places).
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer