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JOSMRC ADOC | Study Guide & Practice Questions

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Comprehensive JOSMRC ADOC study resource featuring exam-focused practice questions, answers, and key review topics. Designed to support efficient preparation and reinforce essential concepts for the JOSMRC assessment.

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JOSMRC ADOC
What are the 6 principles of sound shipboard operation - ANS-procedural compliance
level of knowledge
questioning attitude
forceful backup
formality
integrity

procedural compliance - ANS-approved written instructions, knowing the references and
how to use them

level of knowledge - ANS-foundation upon which you base your decisions

questioning attitude - ANS-learned trait that must be practiced
critical thinking where you expect to find conditions what require action

forceful backup - ANS-unclear orders are questioned and clarified
stopping an unsafe act you just happen to be walking by when it would be easier to
ignore it and keep going

formality - ANS-how we act and communicate and perform maintenance

integrity - ANS-doing the right thing when nobody is watching, taking responsibility for
your actions

PBED process - ANS-Plan
brief
execute
debrief
encourage feedback from deckplates, improve results, act of debrief results, improve
and dont repeat old mistakes

incident reporting - ANS-sharing lessons with the fleet
NOT intended to assign blame

three main types of propulsion - ANS-Diesel
gas turbine
steam




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What does the MRG do? - ANS-Takes high speed low torque and converts it to low
speed high torque through a double pinion (reduction) system

dehumidifier - ANS-removes moisture from the air inside the MRG to prevent internal
rusting (I/P only)

vent fog precipitator - ANS-removes airborne oil fog emanating from MRG before it can
be discharged into the mainspace (U/W only)

How does fixed pitch propeller work? - ANS-blades and hub form a single integral
casting and therefore you must spin in two different directions to change from forward to
astern

How does CPP work? - ANS-control system positions the propeller blades, permitting a
range of thrust from full ahead to full astern while the main propulsion machinery
continues to operate in the same direction of shaft rotation

What is a heat exchanger, how does it work - ANS-transfers heat from one substance to
another utilizing the principle of convection
heat flows from high to low
greater the temp difference the faster the heat transfer
can regulate utilizing valves

what type of remote valve operator uses coil and core mechanism to open or close on
an electric signal? - ANS-Solenoid

What type of remote valve operator uses a pneumatic or electric motor - ANS-Motor

Ohms Law - ANS-V=IR

what is the power factor - ANS-ratio of TRUE power to APPARENT power: ratio of real
power flowing to the load VS apparent power in the circuit
True/Apparant (think .8)

what allows us to take A/C power from one circuit to another? - ANS-Transformer via
electromagnetic induction (frequency is not changed)

What does the PMG (aka PMA permanent magnetic alternator) do? - ANS-Supplies 120
VAC excitation power to the voltage regulator during initial start up generator excitation




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