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

USCG Steam Plants (Boilers & Turbines) (Set 14)

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Question 1 of 30

In the thrust bearing assembly illustrated the total oil clearance can be correctly decreased by __________. Illustration SE-0007

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30 MCQs

#1 In the thrust bearing assembly illustrated the total oil clearance can be correctly decreased by __________. Illustration SE-0007 #2 In the diagrammatic arrangement of the thrust bearing, shown in the illustration, the direction of shaft rotation and the direction of thrust are indicated respectively by arrows __________. Illustration SE-0012 #3 The base ring shown in the illustration is identified by the letter __________. Illustration SE-0012 #4 A Kingsbury, or pivot shoe type thrust bearing, can bear much greater loads per square inch of working surface than can parallel surface bearings because provisions are made in the Kingsbury bearing __________. #5 Which of the statements listed applies to the quill shaft shown in the illustration? Illustration SE-0005 #6 Which of the following operational practices is helpful in avoiding the accumulation of condensate in the main reduction gear casing? #7 The most practical method of determining the condition of a shaft bearing while the shaft is in operation is to __________. #8 Which of the listed operational checks should be made "continuously" on the main propulsion reduction gears? #9 Which immediate action should you take when the temperature of one line shaft bearing increases above its normal operating temperature? #10 The most practical method of determining the condition of a shaft bearing while the shaft is in operation is to __________. #11 Which of the following would cause the dowel or locking lip of a split-type, precision insert, main bearing to shear and allow the bearing to rotate with the journal? #12 If a line shaft bearing begins to overheat, the shaft speed should be reduced. If overheating persists, you should then __________. #13 What is the FIRST thing that will happen if both the main and standby lube oil pumps fail on a geared main propulsion turbine operating at full sea speed? #14 While a vessel is underway the low pressure turbine high-speed pinion is damaged. The pinion is then removed from the gear train. Under these circumstances, the main unit is capable of which speed and direction? #15 Precautions to be observed prior to starting a turbine driven cargo pump, should include __________. #16 The boiler wrapper sheet, shown in the illustration, is indicated by arrow __________. Illustration SG-0007 #17 In what section of a boiler would you find a steam quality of 90%? #18 Steam baffles are used in the steam drum of a water-tube boiler to __________. #19 The internal feed pipe in a D-type marine boiler __________. #20 Which of the following statements represents the purpose of boiler sliding feet? #21 Which area shown in the illustration will offer the most resistance to heat transfer from the fireside to the waterside of a boiler tube? SG-0017 #22 Under what operating conditions may water wall header drains be used for blow down? #23 In the boiler shown in the illustration, the arrow "E" indicates a __________. SG-0008 #24 One advantage of installing water wall tubes in a boiler furnace is to __________. #25 In most marine boilers, the primary reason the first few rows of generating tubes, called screen or furnace row tubes, are made larger in diameter than the rest of the generating tubes is because __________. #26 The boiler superheater shown in the illustration is a/an __________. SG-0007 #27 Where is the superheater located in the boiler shown in the illustration? SG-0008 #28 The purpose of the division plates installed in boiler superheater headers is to __________. #29 Which of the devices listed is shown in the boiler illustration? SG-0008 #30 The items labeled "D" and "M" as indicated on the illustration are commonly called ________. SG-0020

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