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

USCG Steam Plants (Boilers & Turbines) (Set 15)

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Question 1 of 30

The device shown in the illustration is a/an __________. SG-0013

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30 MCQs

#1 The device shown in the illustration is a/an __________. SG-0013 #2 Desuperheated steam can be found at the __________. #3 Which of the following locations could desuperheated steam be considered to occur? #4 The primary purpose of a control desuperheater installed in the steam drum of a boiler is to __________. #5 Which of the devices listed is indicated by arrow "H" shown in the illustration? SG-0008 #6 The minimum feed water inlet temperature to a boiler economizer is determined by the __________. #7 Boiler fuel savings gained by the use of an economizer can amount to __________. #8 Which of the conditions listed could cause steam formation in the economizer? #9 The boiler economizer provides additional heat to the __________. #10 A check valve is located between the economizer and the steam drum to __________. #11 One factor for determining the minimum feed water inlet temperature to a boiler economizer is the __________. #12 Which of the listed refractory materials can be used in an area directly exposed to the highest heat in the furnace? #13 In a regenerative air heater, air is bypassed around the heater while __________. #14 When heated, brickwork in a boiler is kept from buckling by the installation of __________. #15 Which of the listed refractory materials is composed of wool fibers and clay binders? #16 According to the illustration of a typical boiler furnace rear wall, which item number would best represent "insulating block"? Illustration SG-0003 #17 Boiler refractory firebrick is secured to the casing by __________. #18 Boiler refractory previously baked out and fired is most sensitive to __________. #19 Which of the listed types of safety valves is shown in the illustration? Illustration SG-0018 #20 On a boiler safety valve, the blow down adjusting ring is locked in place by a __________. #21 What is the primary operational difference between a nozzle reaction safety valve and a huddling chamber safety valve? #22 When excessive static boiler pressure has resulted in the initial lift of the valve disc, a huddling chamber safety valve will continue to lift open as a result of ___________, #23 Scavenging air lines are connected to boiler stack periscopes to __________. #24 Which type of waterside deposits can normally be removed by chemically boiling out a boiler? #25 Steam line water hammer can be best prevented by __________. #26 A water-tube boiler can be laid up either wet or dry. If it is to be laid up wet, you should __________. #27 Which of the methods listed would be most effective in repairing a steam cut on a seating surface of a superheater handhole plate? #28 Which of the tools listed is used to remove a boiler tube from a header? #29 When you are installing a new furnace floor in an oil fired boiler, the clearance between the firebricks should be large enough to __________. #30 Which of the listed procedures is the most important factor to take into consideration when making repairs to the refractory surrounding the burner openings?

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