Pass Benchmark: 70% • Standard: USCG NMC / 46 CFR
USCG Engine Safety (Supplementary) (Set 9)
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Question 1 of 30
Telescopic pipes which are attached to water cooled pistons of large slow-speed main propulsion diesel engines are designed to __________.
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30 MCQs #1 Telescopic pipes which are attached to water cooled pistons of large slow-speed main propulsion diesel engines are designed to __________. #2 If the speed of the propeller is 135 RPM, the speed of the engine camshaft shown in the illustration will be __________. MO-0003 #3 Which construction detail is apparent in the connecting rod and piston assembly shown in the illustration? MO-0011 #4 The illustration shown describes a _______. MO-0069 #5 Which of the following statements is correct concerning the connecting rod and piston assembly shown in the illustration? MO-0011 #6 Item #16 of the piston shown in the illustration is a/an __________. MO-0011 #7 Ring groove inserts are occasionally used on aluminum alloy pistons to __________. #8 High-speed, multi-cylinder, diesel engines commonly use counterweights placed opposite to the crankpins to __________. #9 During main engine performance testing it is noticed that the firing pressure in one cylinder is lower than the average, but cylinder compression pressure and fuel pump delivery rate are normal. Which of the following would most likely be the cause? #10 Excessively worn, or polished ends on a diesel engine valve spring, indicate __________. #11 What will cause valve stem blow-by to the valve section shown in the illustration? Illustration MO-0030 #12 Worn main bearings will cause the compression ratio of a diesel engine to __________. #13 Which of the conditions listed could cause the cylinder relief valves on a large, low- speed, propulsion diesel engine to lift? #14 When inspecting pistons, liners, and rings of a large two-stroke/cycle diesel engine through the cylinder ports, a wet piston crown would indicate a __________. #15 Which of the following procedures should be carried out to permit the continued operation of a crosshead engine with a leaky after cooler? #16 While at sea, the first engineer reports the jacket water expansion tank water has become discolored and has a smell of exhaust on a slow speed two stroke engine. Which would be the most likely cause? #17 A diesel engine emits blue exhaust smoke as a result of __________. #18 Before any auxiliary diesel engine hydraulic starting system is opened for servicing or repair, you must __________. #19 The part labeled "G", as shown in the illustration, is a __________. MO-0040 #20 A diesel engine may fail to start when being cranked, due to __________. #21 One remedy for a high firing pressure, in addition to a high exhaust temperature in one cylinder of a diesel engine, is to __________. #22 In a four-stroke/cycle diesel engine, badly worn intake valve guides can cause excessive __________. #23 Which of the following statements is true concerning the air starting valve, labeled "III", as shown in the illustration? See Illustration MO-0046 #24 During the starting of a diesel engine, compression gases are prevented from backing into the air starting system, shown in the illustration, by the __________. MO-0046 #25 In a direct cylinder admission air starting system, once the engine begins to fire, the air starting check valve illustrated, is closed by __________. MO-0107 #26 When an engine fitted with a hydraulic starting system starts up, the starter is protected from the higher speed of the engine by __________. #27 Auxiliary diesel engine electric starting motors use __________. #28 An oil-operated, direct-reversing mechanism on a large, low-speed, main propulsion diesel engine, can serve to __________. #29 In order to reverse the rotation of a two-stroke/cycle loop scavenged, direct reversing, propulsion diesel engine, the cam positions must be changed for the __________. #30 The cylinders labeled "B" and "C" in the illustration are used to __________. MO-0125
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