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20 Cards in this Set
- Front
- Back
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1) Three combustible elements which are found in most steam plant fuels are ---
(A) sulphur, hydrogen, and ash (B) hydrogen, carbon, and sulphur (C) carbon, sulphur, and ethane (D) methane, ethane, and hydrogen |
(B) hydrogen, carbon, and sulphur
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2) A fuel oil with a pour point of 100 degrees F would ---
(A) not be pourable below 100 degrees F (B) not be pourable above 100 degrees F (C) be easy to pour at 80 degreees F (D) never require heating prior to use at the burner |
(A) not be pourable below 100 degrees F
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3) The main advantage for burning low sulfur oil in the power plant is ---
(A) lower pour point (B) lower cost (C) less stach emissions (D) lower firing temperature |
(C) less stach emissions
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4) The lowest temperature at which fuel oil will give off a vapor that will ignite when brought into contact with a flame and then extinguish itself is termed the ---
(A) firing temperature (B) flash point (C) API number (D) pour point |
(B) flash point
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5) Air contains by volume ---
(A) 79 percent oxygen, 21 percent nitrogen (B) 79 percent nitrogen, 21 percent oxygen (C) 21 percent oxygen, 79 percent hydrogen (D) 79 percent nitrogen, 21 percent carbon dioxide |
(B) 79 percent nitrogen, 21 percent oxygen
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6) The heating value of fuel oil is usually expressed in ---
(A) KW/hr (B) BTU's/hr (C) BTU's/lb (D) BTU's |
(C) BTU's/lb
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7) The amount of air needed in pounds to supply one pound of oxygen for combustion would be ---
(A) 17.4 (B) 8.93 (C) 4.35 (D) 2.66 |
(C) 4.35
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8) The predominant constituant of natural gas is ---
(A) ethane (B) nitrogen (C) methane (D) argon |
(C) methane
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9) The heating value of fuel oil can be computed by using a (an) ---
(A) hydrometer (B) oxygen bomb calorimeter (C) heat gauge (D) API scale |
(B) oxygen bomb calorimeter
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10) The Hayes Orsat analyzer would most likely be used for --
(A) fuel oil analysis (B) flue gas analysis (C) fuel gas analysis (D) hydrogen analysis |
(B) flue gas analysis
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11) The fuel generally used with the continuously recording analyzer measuring the amount of oxygen present in flue gas is ---
(A) methane (B) CO2 (C) ethane (D) hydrogen |
(D) hydrogen
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12) Off-stoichiometric combustion caused by a shortage of oxygen would be indicated in a flue gas sample as ---
(A) CO (B) CO2 (C) O2 (D) SO2 |
(A) CO
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13) Stoichiometric combustion would be indicated in a flue gas sample as ---
(A) CO and O2 (B) CO2 (C) CO (D) CO2 and O2 |
(B) CO2
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14) The excess oxygen curve is used as a guide to determine ---
(A) fuel-air ratio settings (B) proper firing temperatures (C) fan speed settings (D) exit flue gas temeratures |
(A) fuel-air ratio settings
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15) The quanity of excess air supplied for satisfactory combustion is not dependent on the ---
(A) size of the fuel particles (B) design of the furnace and fuel burning equipment (C) quanity of the fuel burned (D) proportion of inert material present |
(D) proportion of inert material present
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16) The total weight of the flue gases is always ---
(A) the same as the weight of the air required to support combustion (B) less than the total weight of the fuel burned (C) equal to the total weight of the fuel burned plus the weight of the air required to burn it (D) equal to the weight of the fuel burned less the weight of the non-combustibles in the fuel |
(C) equal to the total weight of the fuel burned plus the weight of the air required to burn it
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17) A steam generator furnace is designed to provide for the three "T's" of combustion, on of which is not ---
(A) temperature (B) time (C) tempuring (D) turbulance |
(C) tempuring
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18) The function of the flue gas recirculation fan for steam temperature control is to provide a means for ---
(A) altering boiler efficiency (B) reducing the total heat absorption (C) reducing flue gas weight up the stack (D) altering the heat absorption pattern |
(D) altering the heat absorption pattern
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19) In case of a flameout the first thing that should be done is to ---
(A) trip the air (B) trip the fuel (C) call the load dispatcher (D) change the fuel |
(B) trip the fuel
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20) Which of the following conditions could not be attributed to excess air?
(A) incomplete combustion (B) lower efficiency (C) higher stack temperatures (D) higher O2 content in flue gas samples |
(A) incomplete combustion
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