Pass Benchmark: 70% • Standard: USCG NMC / 46 CFR
USCG Engine General (Supplementary) (Set 9)
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Question 1 of 30
As shown in figure "A" of the illustrated block diagram of a central operating system configured for direct digital control, what does the output system block "DIGITAL OUTPUT" represent? EL-0095
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30 MCQs #1 As shown in figure "A" of the illustrated block diagram of a central operating system configured for direct digital control, what does the output system block "DIGITAL OUTPUT" represent? EL-0095 #2 As shown in figure "A" of the illustrated block diagram of a central operating system configured for direct digital control, what does the output system block "ANALOG A/D" represent? EL-0095 #3 As shown in figure "A" of the illustrated block diagram of a central operating system configured for direct digital control, what does the output system block "DIGITAL CONTACT" represent? EL-0095 #4 As shown in the illustrated block diagram for a distributed automation system, what statement is true concerning the area networks? EL-0096 #5 As shown in the illustrated block diagram for a distributed automation system, what statement is true concerning the workstations labeled "LOS" associated with the port power management system? EL-0096 #6 As shown in the illustrated block diagram for a distributed automation system, what statement is true concerning the data communication pathways labeled "Dual CAN"? EL-0096 #7 As shown in the illustrated block diagram for a distributed automation system, what statement is true concerning the units labeled "WCU" in the accommodations? EL-0096 #8 Which of the following liquid level sensors would be most suitable for measuring the liquid level in a pressure vessel such a water-tube boiler steam drum? #9 Which of the following bearing types would be an example of a plain bearing which substitutes fluid friction for sliding friction? #10 Which of the following roller bearing types would be limited to radial thrust load applications? #11 What statement is true concerning the hydrostatic lubrication of plain bearings? #12 Antifriction bearings can be removed undamaged from a shaft by using an arbor press, or wheel puller with a________. #13 After adding grease to a ball bearing with a handheld grease gun, you should __________. #14 Regarding a freshwater generator of the reverse-osmosis type, what statement is true? #15 Reverse-osmosis freshwater generators usually feature multiple membrane modules, typically of the spiral-wound membrane type. How are these multiple membrane modules piped? #16 Regarding a reverse-osmosis type freshwater generator using multiple spiral-wound membrane modules, what statement is true? #17 To ensure potable water of drinking quality, chemical treatment is required for reverse- osmosis freshwater generators. What is the purpose of chemical pre-treatment? #18 Regarding the operating principle of a reverse-osmosis type freshwater generator, what statement is true? #19 Regarding the high-pressure pump of a reverse-osmosis freshwater generator, what statement is true? #20 For the successful operation of a reverse-osmosis freshwater generator, why is the high pressure pump required to operate in the 750 to 1200 psig range for a discharge pressure? #21 If the orifice in the loop seal of a flash evaporator were to become significantly enlarged through erosion, the __________. #22 A high reading is only indicated at the salinity cells labeled "W" and "6" shown in the illustration. This would be the probable result of __________. GS-0053 #23 On which of the following heated surfaces of a flash type evaporator would you be more likely to find soft scale formation? #24 A vacuum is initially created in a flash type distilling plant by __________. #25 Early models of the flash-type evaporators used a separate shell-and-tube heat exchanger as the air ejector condenser. More recent models use a combined air ejector condenser with the __________. #26 What would be the first indication that a tube leak has occurred in area "23"? Illustration MO-0111 #27 When securing a jacket-water heated submerged tube evaporator for an extended period of time, you should __________. #28 Which of the following acids is preferable and most commonly used for scale removal from the heating surfaces of the jacket-water heated submerged-tube evaporator? #29 What occurs in the space labeled "G" of the device shown in the illustration? MO-0110 #30 Which of the following conditions occurs in the section labeled "F" of the device shown in the illustration? MO-0110
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