UP CH5

What is steam?

• Ice phase of water

• Liquid phase of water

• Solid phase of water

• Gaseous phase of water

What is the function of a boiler in the steam generation process?

• To heat water to its boiling point

• To pump water back to the condenser

• To condense steam

• To expand steam

What type of steam is obtained by further heating dry saturated steam?

• Low pressure steam

• Wet steam

• Dry steam

• Superheated steam

What is the main function of a turbine in the steam process?

• To pump feed water

• To condense steam

• To expand steam

• To heat water

Which type of boiler has hot gas tubes immersed in water?

• Fire tube boiler

• Water tube boiler

• Superheated boiler

• Low pressure boiler

What is the main advantage of a water tube boiler over a fire tube boiler?

• Very high pressure capability

• Cheaper cost

• Higher efficiency

• Compact construction

What is the purpose of expansion loops in steam distribution?

• To pump water

• To absorb thermal expansion

• To prevent thermal expansion and contraction

• To remove sediments

What is used to cover steam pipes to prevent heat loss?

• Blowdown

• Feed water

• Stack

• Lagging

What hazard is associated with high pressure steam?

• Thermal expansion

• High pressure hazard

• Heat hazard

• Wet steam hazard

What can cause thermal stress fracturing in steam equipment?

• Damaged fittings

• Overheating

• Corrosion

• Overpressurisation