Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR

USCG Steam Plants (Boilers & Turbines) (Set 24)

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Question 1 of 30

Coast Guard Regulations (46 CFR Part 56) require that new fuel oil service piping between pumps and burners be subjected to __________.

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30 MCQs

#1 Coast Guard Regulations (46 CFR Part 56) require that new fuel oil service piping between pumps and burners be subjected to __________. #2 Coast Guard Regulations (46 CFR) require that quick-closing valves on a fuel oil service system should be installed as close as is practicable to the __________. #3 In accordance with Coast Guard Regulations (46 CFR) all fuel oil service piping in the vicinity of the burners must __________. #4 Coast Guard Regulations (46 CFR) for boiler fuel oil service systems require __________. #5 According to Coast Guard Regulations (46 CFR), which of the following is permitted in boiler fuel oil service system discharge piping? #6 All oil-fired main propulsion burners with automatic safety control systems must automatically close the burner valve when _________. #7 Coast Guard Regulations (46 CFR) require that the design pressure of an economizer integral with the boiler and connected to the boiler drum without intervening stop valves shall be at least equal to __________. #8 When a boiler economizer is fitted with a valved bypass, Coast Guard Regulations (46 CFR) require which of the following devices to be installed? #9 According to Coast Guard Regulations (46 CFR), feed water nozzles shall be fitted with sleeves, or have other suitable means employed to reduce the effects of temperature differentials on all boilers designed for operating pressures of __________. #10 Journal bearings used with modern turbine rotors are manufactured in two halves in order to __________. #11 The adjustable spherically seated self-aligning bearing housings used in main turbines are provided with oil deflector rings. The function of these rings is to __________. #12 On a main propulsion turbine bearing, the readings obtained with a bridge gage represent the __________. #13 Main steam turbine bearings are lined with __________. #14 For a large main propulsion turbine, the most commonly used turbine thrust bearing is the __________. #15 An efficient seal is normally obtained between the upper and lower halves of a turbine casing by __________. #16 Turbine casing flanges are sometimes provided with a system of joint grooving to __________. #17 Allowance for axial expansion of the steam turbine due to temperature changes is provided for by the use of __________. #18 Which of the devices listed is found on an LP main propulsion steam turbine casing? #19 The purpose of the sentinel valve installed on a turbine casing is to __________. #20 Which of the following statements is true concerning the turbine shown in the illustration? Illustration SE-0016 #21 The astern element of a main propulsion turbine is usually designed as a/an __________. #22 Labyrinth seals used to reduce leakage around a turbine shaft are constructed of __________. #23 When turbine rotor shafts extend through the casing, an external source of sealing steam is used in conjunction with labyrinth packing to __________. #24 The labyrinth seals used on rotating steam turbine shafts reduces external leakage by causing __________. #25 Labyrinth packing rings are installed on turbine diaphragms to minimize __________. #26 Where are moisture shields located in a main propulsion steam turbine? #27 The jacking/turning gear mechanism of a main propulsion geared turbine installation is normally connected through mechanical linkage to the _______. #28 The jacking gear on main propulsion turbines can be used to __________. #29 The main propulsion shaft turning gear usually connects to the free end of the high- speed high pressure pinion because the __________. #30 Which of the devices listed is generally used to engage the main engine turning gear to the high pressure turbine high-speed pinion?

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