Prize-winning Quiz on Coal Chemical Engineering Knowledge 7
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1. Which of the following pumps ( ) is not a positive-displacement pump? A: Screw pump; B: Reciprocating pump; C: Centrifugal pump; D: Metering pump. 2. The most important components of a centrifugal pump are ( ). A: Impeller, shaft seal device; B: Pump shaft, impeller, pump casing; C: Pump casing, impeller, shaft seal device. 3. Classified by the way they withstand pressure, pressure vessels can be divided into internal-pressure vessels and external-pressure vessels. Internal pressure vessels can also be classified into four pressure grades based on their design pressure; the pressure range for low-pressure vessels is ( ) A: 0.1MPa≤p＜1.6Mpa ； B: 0.5MPa≤p＜0.8Mpa ； C: 0.1MPa≤p＜1.0Mpa ； D: 0.8MPa≤p＜2.0Mpa ； 4. Classified by the mode of pressure application, pressure vessels can be divided into internal-pressure vessels and external-pressure vessels. Internal pressure vessels can also be classified into four pressure grades based on their design pressure; the pressure range for high-pressure vessels is ( ) A: 10MPa ≤ p < 100Mpa ； B: 8MPa≤p ＜50Mpa ； C: 60MPa≤p ＜100Mpa ； D: 8MPa≤p ＜100Mpa ； 5. Which of the following relationships is correct? ( ). A: Absolute pressure = Gauge pressure + Atmospheric pressure; B: Absolute pressure = Gauge pressure – Atmospheric pressure; C: Vacuum pressure = Absolute pressure – Atmospheric pressure. Answers: 1.C 2.C 3.A 4.A 5.A. This post was last edited by wbp on 2009-4-8 07:03.]
1. Among the following pumps, (C) is not a positive-displacement pump: A: Screw pump; B: Reciprocating pump; C: Centrifugal pump; D: Metering pump. 2. The most important components of a centrifugal pump are (B). A: Impeller, shaft seal device; B: Pump shaft, impeller, pump casing; C: Pump casing, impeller, shaft seal device. 3. Classified by the way they withstand pressure, pressure vessels can be divided into internal-pressure vessels and external-pressure vessels. Internal pressure vessels can also be classified into four pressure grades based on their design pressure; the pressure range for low-pressure vessels is (A): A: 0.1MPa ≤ p < 1.6Mpa ； B: 0.5MPa≤p＜0.8Mpa ； C: 0.1MPa≤p＜1.0Mpa ； D: 0.8MPa≤p＜2.0Mpa ； 4. Classified by the mode of pressure application, pressure vessels can be divided into internal-pressure vessels and external-pressure vessels. Internal pressure vessels can also be classified into four pressure grades based on their design pressure; the pressure range for high-pressure vessels is (A): A: 10 MPa ≤ p < 100 MPa ； B: 8MPa≤p ＜50Mpa ； C: 60MPa≤p ＜100Mpa ； D: 8MPa≤p ＜100Mpa ； 5. Which of the following relationships is correct? (A). A: Absolute pressure = Gauge pressure + Atmospheric pressure; B: Absolute pressure = Gauge pressure – Atmospheric pressure; C: Vacuum pressure = Absolute pressure – Atmospheric pressure.
1. Among the following pumps, (C) is not a positive-displacement pump: A: Screw pump; B: Reciprocating pump; C: Centrifugal pump; D: Metering pump. 2. The most important components of a centrifugal pump are (B). A: Impeller, shaft seal device; B: Pump shaft, impeller, pump casing; C: Pump casing, impeller, shaft seal device. 3. Classified by the way they withstand pressure, pressure vessels can be divided into internal-pressure vessels and external-pressure vessels. Internal pressure vessels can also be classified into four pressure grades based on their design pressure; the pressure range for low-pressure vessels is (A): A: 0.1MPa ≤ p < 1.6Mpa ； B: 0.5MPa≤p＜0.8Mpa ； C: 0.1MPa≤p＜1.0Mpa ； D: 0.8MPa≤p＜2.0Mpa ； 4. Classified by the mode of pressure application, pressure vessels can be divided into internal-pressure vessels and external-pressure vessels. Internal pressure vessels can also be classified into four pressure grades based on their design pressure; the pressure range for high-pressure vessels is (A): A: 10 MPa ≤ p < 100 MPa ； B: 8MPa≤p ＜50Mpa ； C: 60MPa≤p ＜100Mpa ； D: 8MPa≤p ＜100Mpa ； 5. Which of the following relationships is correct? (A). A: Absolute pressure = Gauge pressure + Atmospheric pressure; B: Absolute pressure = Gauge pressure – Atmospheric pressure; C: Vacuum pressure = Absolute pressure – Atmospheric pressure.
1、C 2、C 3、A 4、A 5、A
1. Among the following pumps, (C) is not a positive-displacement pump: A: Screw pump; B: Reciprocating pump; C: Centrifugal pump; D: Metering pump. 2. The most important components of a centrifugal pump are (A). A: Impeller, shaft seal device; B: Pump shaft, impeller, pump casing; C: Pump casing, impeller, shaft seal device. 3. Classified by the way they withstand pressure, pressure vessels can be divided into internal-pressure vessels and external-pressure vessels. Internal pressure vessels can also be classified into four pressure grades based on their design pressure; the pressure range for low-pressure vessels is (A): A: 0.1MPa ≤ p < 1.6Mpa ； B: 0.5MPa≤p＜0.8Mpa ； C: 0.1MPa≤p＜1.0Mpa ； D: 0.8MPa≤p＜2.0Mpa ； 4. Classified by the mode of pressure application, pressure vessels can be divided into internal-pressure vessels and external-pressure vessels. Internal pressure vessels can also be classified into four pressure grades based on their design pressure; the pressure range for high-pressure vessels is (A): A: 10 MPa ≤ p < 100 MPa ； B: 8MPa≤p ＜50Mpa ； C: 60MPa≤p ＜100Mpa ； D: 8MPa≤p ＜100Mpa ； 5. Which of the following relationships is correct? (A). A: Absolute pressure = Gauge pressure + Atmospheric pressure; B: Absolute pressure = Gauge pressure – Atmospheric pressure; C: Vacuum pressure = Absolute pressure – Atmospheric pressure.
1C 2C 3A 4A 5A
1、C 2、C 3、A4、 A 5、A
My answer: 1C2C3A4A5A. All the answers have been given; how can anyone else answer? Please do not include answers when creating questions next time. The answer can be announced later.