《何者将让液体系统发生水锤现象的可能性》由会员分享，可在线阅读，更多相关《何者将让液体系统发生水锤现象的可能性（88页珍藏版）》请在金锄头文库上搜索。
1、 1科目： 193006 知能：K1.04 3.4/3.6 序號： P78 The possibility of water hammer in a liquid system is minimized by. A. maintaining temperature above the saturation temperature. B. starting centrifugal pumps with the casing vent valve fully open. C. starting positive displacement pumps with the discharge valve
2、 closed. D. venting systems prior to starting centrifugal pumps. ANSWER: D. 下何者將讓液體系統發生水錘現象的可能性至最低？ A. 溫維持在飽和溫之上。 B. 在外殼排氣閥全開下啟動心泵。 C. 在出口閥關閉下啟動正排泵。 D. 啟動心泵之前先將系統排氣。 答案：D. 2科目： 193006 知能：K1.04 3.4/3.6 序號： P278 Which one of the following methods will increase the possibility and/or severity of water
3、hammer? A. Opening and closing system valves slowly B. Venting fluid systems prior to starting a pump C. Starting a centrifugal pump with the discharge valve fully open D. Starting a centrifugal pump with the discharge valve fully closed ANSWER: C. 下哪項方法將提高水錘現象的發生可能性和/或嚴重性？ A. 緩慢開啟與關閉系統閥門。 B. 啟動泵之前，
4、先將體系統排氣。 C. 在出口閥全開下啟動心泵。 D. 在出口閥全關下啟動心泵。 答案：C. 3科目： 193006 知能：K1.04 3.4/3.6 序號： P679 (B279) A sudden stop of fluid flow in a piping system, due to rapid closure of an isolation valve, will most likely result in. A. check valve slamming. B. pump runout. C. water hammer. D. pressurized thermal shock.
5、ANSWER: C. 隔閥快速關閉而造成管系統體突然停止動，此情況最可能導致 A. 止回閥關閉 B. 泵超(runout) C. 水錘現象 D. 壓熱震(pressurized thermal shock) 答案：C. 4科目： 193006 知能：K1.04 3.4/3.6 序號： P879 One reason for keeping condensate out of the steam lines is to. A. minimize corrosion buildup. B. reduce heat losses. C. eliminate steam traps. D. preve
6、nt water/steam hammer. ANSWER: D. 避免在蒸汽管產生凝結水的原因之一是 A. 減少積腐蝕至最低。 B. 減少熱損失。 C. 無須使用蒸汽袪除器(steam trap)。 D. 避免水錘/蒸汽錘現象。 答案：D. 5科目： 193006 知能：K1.04 3.4/3.6 序號： P1079 The possibility of water hammer will be increased by. A. maintaining the discharge line filled with liquid on an automatically starting pum
7、p. B. condensation in a steam line just prior to initiating flow. C. warming steam lines prior to initiating steam flow. D. slowly closing the discharge valve on an operating pump. ANSWER: B. 下何者將增加水錘現象發生？ A. 自動啟動泵的出口管持續裝滿液體。 B. 蒸汽管於蒸汽開始動前發生凝結。 C. 蒸汽管於蒸汽開始動前加熱。 D. 緩慢關閉運轉水泵的出口閥。 答案：B. 6科目： 193006 知能：
8、K1.04 3.4/3.6 序號： P1279 To minimize the possibility of water hammer when initiating flow in a system, the operator should. A. vent the system prior to initiating flow. B. vent the system only after flow has been initiated. C. fully open the pump discharge valve prior to starting a pump. D. rapidly o
9、pen the pump discharge valve after a pump is running. ANSWER: A. 系統開始動時，欲將水錘現象發生可能性至最低，運轉員應該 A. 在開始動前，先將系統排氣。 B. 唯有在開始動後，才將系統排氣。 C. 啟動泵之前，讓其出口閥全開。 D. 泵開始運轉後，迅速開啟其出口閥。 答案：A. 7科目： 193006 知能：K1.04 3.4/3.6 序號： P1879 (B2779) Which one of the following describes why large steam lines are gradually warmed
10、instead of suddenly admitting full steam flow? A. To minimize the possibility of stress corrosion cracking of the steam lines B. To minimize the total thermal expansion of the steam lines C. To minimize the potential for water hammer in the steam lines D. To minimize the heat loss from the steam lin
11、es ANSWER: C. 下何者描述為何大型蒸汽管要逐漸加熱，而是突然增加至全蒸汽？ A. 為使蒸汽管的應腐蝕破可能性至最低。 B. 為使蒸汽管的總熱膨脹至最低。 C. 為使蒸汽管發生水錘現象的可能性至最低。 D. 為使蒸汽管的熱損失至最低。 答案： C. 8科目： 193006 知能：K1.04 3.4/3.6 序號： P2079 (B2081) Which one of the following will minimize the possibility of water hammer? A. Draining the discharge line of a centrifugal p
12、ump after shutdown B. Draining condensate out of steam lines before and after initiating flow C. Starting a centrifugal pump with its discharge valve fully open D. Starting a positive displacement pump with its discharge valve partially closed ANSWER: B. 下何者將水錘現象的可能性至最低？ A. 停機後，排盡心泵出口管的水份。 B. 在蒸汽開始動
13、前後，排盡蒸汽管內的凝水。 C. 在出口閥全開下啟動心泵。 D. 在出口閥部分關閉下啟動正排泵。 答案：B. 9科目： 193006 知能：K1.04 3.4/3.6 序號： P2279 (B2679) Which one of the following operating practices minimizes the possibility of water hammer? A. Change valve position as rapidly as possible. B. Start a centrifugal pump with the discharge valve thrott
14、led. C. Start a positive displacement pump with the discharge valve closed. D. Vent a system only after initiating system flow. ANSWER: B. 下哪項運轉操作能將水錘現象的可能性至最低？ A. 儘速改變閥位。 B. 在出口閥節下啟動心泵。 C. 在出口閥關閉下啟動正排泵。 D. 只有在系統開始動後，才讓系統排氣。 答案：B. 10科目： 193006 知能：K1.04 3.4/3.6 序號： P4042 (B4041) Refer to the drawing
15、of two lengths of 6-inch piping, each containing an identical automatic isolation valve. The actual pipe lengths are proportional to their symbols in the drawing Water at 65F is flowing at 1,000 gpm through each pipe. If the isolation valves suddenly and simultaneously close, valve A and its associated piping will experience a maximum pressure that is _ the maximum pressure experienced by valve B and its associated piping. The pressure spike will dissipate quicker in the _ length of pipe. A. equal to; sho
