Stationary Engineer Class 3 Examination
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A compendium of questions that should help with any licensing exam.
- 1.
- Scale accumulation on the waterside of a firetube boiler can lead to possible blank and loosining of the tube.
- A.
Blistering
- B.
Spalling
- C.
Overheating
- D.
Efficiency loss
- 2.
- A stay that is shorter than 8” and threaded is required to have a blank
- A.
Tell tale hole
- B.
Stay brace
- C.
Riveted connection
- D.
Bolt brace
- 3.
- All boiler heating surfaces are measured on the side blank the heat.
- A.
Convecting
- B.
Radiating
- C.
Giving
- D.
Receiving
- 4.
- The ratio of the maximum fuel input rate and the minimum fuel input rate is known as the blank.
- A.
Combustion ratio
- B.
Turn down ration
- C.
Rate of ideal fuel
- D.
Blowback
- 5.
- A disavantage of a HRT boiler is that scale or mud deposits on the bottom of the shell, it will rapidly blank and produce blank or blank.
- A.
Condense, bags, blisters
- B.
Overheat, bags, blisters
- C.
Overheat, bags, bulges
- D.
Condense, blister, bulges
- 6.
- The minimum size of the blowdown line is blank inch, and the maximum size is blank inches.
- A.
3/4", 2"
- B.
1 1/2", 2"
- C.
3/4", 2 1/2"
- D.
3/8", 1 1/2"
- 7.
- The hot gases from the furnace pass into a blank lined combustion chamber on a dry back scotch marine boiler.
- A.
Refractory
- B.
Insulation
- C.
Creosote
- D.
Concrete
- 8.
- The number of tubes in each of the four passes is ____________ to maintain constant ______________ and ________ _______________.
- A.
Increased, velocity, heat, transfer
- B.
Reduced, velocity, heat, transfer
- C.
Reduced, density, heat, exchange
- D.
Reduced, velocity, heat, exchange
- 9.
- The early watertube boilers followed some fire tube designs,being straight tubes suspended over a furnace with the tubes rolled in two types of headers (1)____________or (2) ______________ ______________.
- A.
Box header, sinous header
- B.
Barrel header, tube header
- C.
Box header, tube header
- D.
Sinous header, tube header
- 10.Bent tubes are more __________ than straight tubes.
- A.
Reliable
- B.
Structurally sound
- C.
Efficient
- D.
Flexible
- 11.
- Today, most packaged watertube boilers follow one of the three designs. These are known as ___, ____, and ____ types.
- A.
A,D,&O
- B.
A,D, and Sterling
- C.
A,B,and C
- D.
B,C, and O
- 12.
- Flow of liquid in ad coil-type boiler is _______________ through the coils spiral-wound in a counterflow direction to the combustion gases.
- A.
Upward
- B.
Downward
- C.
Inverted
- D.
Transferred
- 13.
- ___________ deflect the hot gases back and forth between the tubes a number of times to enable greater heat absorption by the boiler tubes.
- A.
Headers
- B.
Stays
- C.
Baffles
- D.
Tube sheets
- 14.
- Welding a flat strip of metal between the waterwall tubes is known as ____________ wall construction.
- A.
Tube
- B.
Membrane
- C.
Refractory
- D.
Braced
- 15.
- The general classification of superheaters includes ___________ and _______________ types, depending on wheather they absorb radiant or convection heat.
- A.
Radiant & Convection
- B.
Convection & Conduction
- C.
Radiant & conduction
- D.
Saturated & convection
- 16.Sulfur in the soot then unites with moisture from condensation to produce a _____________ ________, which is extremely corrosive to all steel construction contacted between the economizer and the stack
- A.
Caustic soda
- B.
Carbonic acid
- C.
Phosphorous Acid
- D.
Sulfurous acid
- 17.
- _______ _______________ make the final heat recovery from the boiler flue gases with which they preheat the incoming furnace air for its combustion with fuel.
- A.
Stack Scrubber
- B.
Primary Supply
- C.
Secondary Supply
- D.
Air Preheater
- 18.
- The pipes connecting the water column to the boiler must be a minimum diameter of ____ inch.
- A.
2"
- B.
2.5"
- C.
1"
- D.
3/4"
- 19.
- The two types of electric boilers are _______________ and ______________.
- A.
Resistance & electrode
- B.
Resistance & capacitance
- C.
Arc Tube & electrode
- D.
Electrode & capacitance
- 20.
- There is no _____________ _________ ____ _________________ above the critical pressure, because water and steam have the same density.
- A.
Specific Heat of Atomization
- B.
Latent Heat of vaporization
- C.
Specific heat of vaporization
- D.
Latent heat of atomization
- 21.
- ______ ________________ are used extensively in pulverized-fuel-burning plants in order to keep heat-absorbing surfaces free from soot and ash buildup.
- A.
Soot Blowers
- B.
Stack Scrubbers
- C.
Chain Grate Stokers
- D.
Tube puncher
- 22.
- According to ASME code a HTHW boiler is any boiler that operates above ____________ or ____________.
- A.
150PSI, 200 Deg. F
- B.
150 PSI, 100 Deg. C
- C.
160PSI, 250Deg.F
- D.
14.7 PSI, 212 Deg. F
- 23.
- The waste products from a sugar cane are used in a _______________ plant.
- A.
Bagasse
- B.
Black liquor
- C.
Red liquor
- D.
Saccarine refinery
- 24.
- Cogeneration plants sell ____________ to the local industrial plants, and _____________ to the local __________.
- A.
Fuel oil, steam, power plants
- B.
Steam, condensate, cogeners
- C.
Propane, fuel oil, utilities
- D.
Steam, electricity, utilities
- 25.
- The operation of a black liquor boiler is known for its __________ generation, and heat recovery of _______ _______.
- A.
Steam, sulpfuric acid
- B.
Power, waste heat
- C.
Lignin, soda ash
- D.
Steam, soda ash
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