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

USCG Motor Plants & Auxiliary Boilers (Set 18)

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Question 1 of 30

Carbon deposit build up on the injection nozzle orifice is least likely to occur when using which type of fuel injector nozzle?

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30 MCQs

#1 Carbon deposit build up on the injection nozzle orifice is least likely to occur when using which type of fuel injector nozzle? #2 The amount of fuel delivered by a unit injector is controlled by the __________. #3 Which of the following statements represents the function of the plunger flange labeled "A" shown in the illustration? Illustration MO-0061 #4 As shown in the illustration of the fuel injection pump, the component labeled "N" would be identified as the _____. Illustration MO-0061 #5 What is the purpose of the "window" installed in the housing of an individual jerk pump? #6 The component shown in the illustration would be identified as a ______. Illustration MO-0097 #7 The component identified as item #15 is used to __________. Illustration MO-0016 #8 According to the illustration, fuel cutoff timing in the cylinder is controlled with the component that is identified as the letter _________. Illustration MO-0097 #9 You are testing a closed fuel injection nozzle using a nozzle tester. A pressure slightly less than design valve opening pressure is applied. If no fuel appears at the spray tip, the __________. #10 Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires __________. #11 Uneven bolt tightening during the installation of a fuel injection pump can result in __________. #12 Which of the fuel nozzles listed requires the LEAST maintenance? #13 Which of the following statements concerning the factors affecting ignition delay is correct? #14 Poor combustion in a diesel engine can be caused by __________. #15 Which of the following problems is the main source of fuel pump and injection system malfunctions? #16 Problems with the diesel engine fuel injection pump are usually caused by __________. #17 One cause of diesel engine surging can be a result of __________. #18 Which of the following devices will increase the power output of a diesel engine without increasing its frictional load? #19 Which of the couplings listed is normally not repairable, and is usually replaced if completely damaged? #20 What is the maximum allowable clearance permitted between the bearing, shown in the illustration and the shaft along its vertical axis? Illustration MO-0121 #21 What is the normal bearing clearance permitted at the horizontal axis of the shaft for the bearing shown in the illustration? Illustration MO-0121 #22 After following the prescribed procedures to measure the thrust bearing clearance shown in the illustration, the distance "F" is determined to be 200 mm, and 'f1' is 2.3 mm. Which of the following statements describes the condition indicated by these dimensions? Illustration MO-0121 #23 When an additional load is applied to a diesel engine which is using an inadequately inflated air bladder clutch unit, you can expect __________. #24 Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or __________. #25 The thrust bearing shown in the illustration has over eight years of ahead running time. Measurements show "i1" is 4 mm and "i2" is 1mm. Which of the following conditions is indicated and what steps should be taken, if any? Illustration MO-0121 #26 Downcomers installed on auxiliary package boilers are protected from direct contact with hot gases by __________. #27 When preparing to light off a cold boiler equipped with a return flow fuel oil system, the recirculating valve directs the flow of oil __________. #28 Which of the automatic boiler controls listed should be tested prior to lighting off an auxiliary boiler? #29 The purpose of designing some waste heat boilers with sinuous fire tubes, is to __________. #30 With which of the following types of diesel engine arrangements is a waste heat boiler most likely to produce the maximum steam pressure, temperature, and flow conditions?

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