3-20. What tubes lead from the water drum to
the steam drum?
1. Generating tubes
2. Sidewall tubes
3. Superheater tubes
4. Water wall tubes
3-21. Which of the following are used to
reduce the swirling motion of the
water as it enters the downcomers?
1. Scrubbers
2. Screen plates
3. Vortex eliminators
4. Steam separators
3-22. Where does the steam go after it
leaves the scrubbers?
1. To the cyclone steam separator
2. To the front vortex eliminator
3. To the surface blow pipe
4. To the dry pipe
3-23. Which of the following devices break
up the fuel into very fine particles?
1. Atomizers
2. Diffuser plates
3. Air foils
4. Baffles
3-24. Hero designed and built which of the
following types of engines?
1. Gas-powered
2. Electric-powered
3. Steam-powered
4. Solar-powered
3-25. Hero’s turbine (aeolipile) consists of
a hollow sphere with a total of how
many canted nozzles?
1. One
2. Two
3. Three
4. Four
3-26. The water wheel that was used to
operate the flour mills in colonial
times and the common windmill used to
pump water are examples of what
principle?
1. The turbine principle
2. The reciprocating engine principle
3. The solar energy principle
4. The gravity flow principle
3-27. What two methods are used in turbine
design and construction to get the
desired results from a turbine?
1. Steam and rotary principles
2. Rotary and reciprocating
3. Impulse and reaction principles
4. Reaction and rotary principles
3-28. The energy to rotate an impulse
turbine is derived from what source?
1. The potential energy of the heat
flowing through the nozzles
2. The kinetic energy of the steam
flowing through the turbine shaft
3. The mechanical energy of the
turbine shaft derived from the
atomizers
4. The kinetic energy of the steam
flowing through the nozzles
3-29. As the steam passes through a nozzle,
potential energy is converted into
what other type of energy?
1. Mechanical potential energy
2. Kinetic energy
3. Thermal energy
4. Chemical energy
3-30. Impulse turbines may be used to drive
which of the following equipment?
1. Forced draft blowers
2. Pumps
3. Main propulsion turbines
4. All of the above
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