Heat

Question 1

Heat transfer between the body and environment

Answer 1

• Respiration
• Radiation
• Conduction
• Convection
• Evaporation

Question 2

Convection

Answer 2

layer of cool air comes in contract with warm skin

Question 3

Evaporation

Answer 3

Cooling relies on the latent head of vaporisation of sweat from the body

Question 4

Effect of Heat Physiological

Answer 4

Working in hot temperatures with high work rate can cause

• Cramps
• Heat exhaustion
• Heat stroke

Question 5

Dry-bulb temperature

Answer 5

Temp indicated by a conventional dry-bulb thermometer and is a measure of the sensible heat content of the air

Question 6

Wet bulb

Answer 6

Temp at which water evaporating into the air can bring the air to saturation adiabatically at that temperature

Question 7

Reducing the Effects of Heat

Answer 7

• Reduce heat flow from rock
• location of machinery
• Diution by ventilation
• Acclimatisation

Question 8

Refrigeration

Answer 8

• Positional Cooling

- Cooling Plants

Question 9

Evaporator Component

Answer 9

refrigeration from a liquit to a gas casues heat to be removed

Question 10

Condenser Component

Answer 10

Condensation of the refrigerant occurs as it cools from a gas to a liquid