1 Which of the following is not a property of ceramic fibre insulation

a) Low thermal conductivity

b) Light weight

c) High heat capacity

d) Thermal shock resistant

2 The waste heat recovery equipment in a combustion system will be more economical when the exit flue gases are at a temperature of

a)

b)

c)

d)

3 Which  of the following will not conserve energy in a furnace

a) Preheating combustion air

b) Charge preheating

c) Optimizing excess air

d) Addition of more burners

4 What is the major energy loss in an oil fired reheating furnace?

a) Loss due to evaporation of moisture in fuel

b) Skin losses

c) Sensible heat loss in flue gas

d) Heat loss through openings