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ABYC Diesel Certification 2024 Questions with correct Answers
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ABYC Diesel Certification 2024 Questions with correct Answers minimum spacing between hull vent openings and fuel fill or vent fititngs should be 15 inches thermal efficiency of a diesel engine is such that typical heat converted to useful power is approximately what percent of total heat ...

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  • August 5, 2024
  • 7
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • abyc diesel certification 2024 questions with corr
  • minimum spacing between hull vent openings and fue
  • with some diesel engines it is necessary to use wh
  • who does not have requirements that apply to ex

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ABYC Diesel Certification 2024
Questions with correct Answers

minimum spacing between hull vent openings and fuel fill or vent fititngs should be -
answer15 inches

thermal efficiency of a diesel engine is such that typical heat converted to useful power
is approximately what percent of total heat - answer36%

What is the primary difference between the gasoline-fueled and Jen four stroke cycle
and the diesel four-stroke cycle - answerThe intake stroke only brings air into the
cylinder

Temperature controlled engine room exhaust blowers in a diesel powered boat are
primarily used to - answerLower engine room temperatures

With some diesel engines it is necessary to use what when cold starting - answerHeat

When setting up a piping system for exhaust gases the number of sharp bins should be
kept to a minimum to - answerPrevent excessive exhaust back-pressure

Who does not have requirements that apply to exhaust components and hose types -
answerU.s. coast guard

What is the most likely exhaust related cause for excessive engine operating
temperature - answerExhaust elbows that are old and clogged

an engine equipped with an exhaust mixing elbow is installed below the waterline what
device must be installed in the raw water discharge hose ahead of the mixing elbow -
answerSiphon break

Upon inspection of the wet exhaust system the technician notices that the exhaust hose
is burned near the elbow tech a says that replacing the hose will correct the problem.
Tech b says that the problem is most likely with the cooling system which tech is
correct? - answerTech b

If you do not refill the raw water system with a winterizing solution for long-term storage
after draining the sea water the system is prone to - answerOxidization

Replacement of a failed sea water pump impeller should normally include -
answerChecking all downstream components for impeller pieces

, During a sea trial for a complaint of high-speed overheating the technician finds that the
cooling hoses are swollen and very firm when squeezed and the exhaust hose very hot
to the touch this most likely indicates - answerExhaust manifold or risers are blocked

Technician a says that you must observe USCG regulations when choosing and
installing c Cox. Tech b says there is no standard for Seahawks or their installation.
What tech is correct - answerNeither tech is correct

during engine operation a technician notices that the water level is low in the sea water
strainer this might indicate which of the following - answersea water strainer has an air
leak and sea water inlet problems

The most common cause of low coolant temperature in a closed cooling system is -
answerA faulty thermostat

Auxiliary heating devices such as cabin heaters and water heaters may require -
answerUsing a restrictor fitting and installing the device lower than the expansion tank

The transfer of heat through the fluid in the cooling system is known as -
answerConvection

Exhaust gas is leaking into the coolant system may be caused by a defective -
answerCylinder head gasket

Coolant conditioner filters should be replaced - answerFollow the manufacturer's
recommendation

Exhaust gas is leaking into the coolant system may be caused by a - answerCylinder
head gasket

What is the maximum cold cranking amps allowed before a battery switches required -
answer800 CCA

Starter ground circuit resistance check should be made by connecting the voltmeter
where - answerAcross the ground circuit and measure while cranking

For the same length of wire, a 12 gauge wire will safely carry more what than a 16
gauge wire - answerAmperage

When checking a 12-volt DC starter system with the engine cranking the voltmeter
should read approximately how many volts - answer10 volts

When using a conductance battery tester technician finds that the tested battery CCA
rating is 65% RV batteries specified rating the battery needs to be - answerReplaced

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