A characteristic of water vapor, but not other states of water is:
A) Water is compressible.
B) Water exerts equal pressure to the sides of a container in which it is placed.
C) Small changes in the volume of water occur with changes in temperature.
D) Water molecules move about freely.
A
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Dissolved minerals in the boiler feedwater system include metallic salts and calcium carbonates that cause scale, corrosion, and turbine blade deposits. Boiler feedwater is treated with __________ to precipitate these minerals from the water.
a. lime b. salt c. lemon d. ethanol
Because of the manufacturing process, ferrous metals contain a certain amount of carbon. Cast iron has much larger amount of carbon (2.5% to 4%) as compared with steel (0.1% to 1.7%). How does carbon affect the property of cast iron and steel?
What will be an ideal response?
Technician A says that all current diesel CR fuel systems use a transfer pump. Technician B says that Caterpillar flange mount their transfer pump to the CR high pressure pump. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
One advantage of steam humidifiers is that:
A) They do not have a water sump. B) They operate on 24 V. C) They provide the energy required to evaporate the water. D) They use less energy than evaporative humidifiers.