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Questions and answers about mechanical and electrical systems, focusing on equipment operation, maintenance, and troubleshooting. It covers hydraulic systems, electrical components, air compressors, and machinery used in the US Coast Guard. The questions test knowledge of components, procedures, and safety. It's a study guide for those working with or maintaining such equipment, including troubleshooting, maintenance schedules, and component identification. The question-and-answer format facilitates quick review and self-assessment. It also touches on safety protocols and regulatory standards, serving as a practical tool for reinforcing knowledge and preparing for assessments.
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What allows a compressor to start at a reduced load? - ✔✔unloader Type of hydraulic pump widely used in USCG - ✔✔vane pump What is an ammeter used for - ✔✔measuring either direct or alternating electric current, in amperes. what is used to measure resistance and continuity - ✔✔an ohmmeter Two 12v batteries in series, what is the output - ✔✔creates 24v, amps stays the same what is used between the MDE and R/G in case of misalignment from mission operation? - ✔✔FLEXIBLE COUPLING What is the specific gravity of water - ✔✔ 1 Over 600 air PSI is stored in what kind of container? - ✔✔a flask Under 600 air PSI is stored in what kind of container - ✔✔A receiver Under 600 air PSI is stored in what kind of container - ✔✔A receiver What should be used along with water when cleaning plate type heat exchangers? - ✔✔steel wool when installing new hydraulic equipment, it is tested a 150% for how long? - ✔✔ 30 minutes
newly welded deck fittings are tested to a capacity of what percentage? - ✔✔???? Most common contaminant in hydraulic fluid? - ✔✔water what is used to measure electrical insulation? - ✔✔megohmeter PPM of sulfide allowed in sulfide diesel? - ✔✔ 15 smallest micron visible to the human eye? - ✔✔ 40 microns whats the maximum hole you're allowed to cut in the hull of the ship? - ✔✔???? P- 6 SUCTION HOSE LENGTH - ✔✔ 15 ft What safety switch has been removed from the P-6? - ✔✔oil level safety switch maximum effective range for AFFF - ✔✔15ft Most common used dry powder exstinguisher? - ✔✔PKP (potassium bicarbonate) Vibration damper that is most effective for constant speed changes? - ✔✔Harmonic or gear I don't ****ing know what rings are not allowed to be worn? - ✔✔???? NSTM for propeller coatings? - ✔✔ 245
What is the closure member called in a globe valve? - ✔✔Disc Coast guard uses what kind of maintenance system? - ✔✔Bi-level Coast guard MPC numbers use what system? - ✔✔S1000D Another name for a rotary valve that has a disc the moves 90 degrees? - ✔✔Butterfly what kind of brakes are used in turbines and shafts? - ✔✔DISC/ CALIPER BRAKES What does CDGAT stand for? - ✔✔Combined diesel or gas turbine types of flow through a heat exchanger? - ✔✔Turbulent, cross flow, parallel a NIIN should have how many letters? - ✔✔ 9 NIIN stands for? - ✔✔National item identification number Biobor JF and what are the only allowed bio fuels? - ✔✔Navfleet 9 - 303 what percentage of the gauge should your normal readings fall into? - ✔✔ 33 - 66%? what is VI acronym mean in hydraulics? - ✔✔Viscosity index? viscosity indicator? or variable something? where is the TIT2 sensor located on the BF250? - ✔✔front of the engine, its red What directly affects the steering on a jet drive? - ✔✔engine rpm
What hoses are not tracked in the hose log? - ✔✔out board engine hoses Silicone grease should not be used on o-rings in what systems? - ✔✔petroleum systems A zeroed vaccum gauge will measure what? - ✔✔14.7 psiA P- 100 fuel? - ✔✔F- 76 or JP- 5 What is used for lower unit gear oil? - ✔✔SAE 30 VTEC is on which side of the engine? - ✔✔intake How tight should the steering linkages be on the 45RBM? - ✔✔do not torque Water trapped in fuel is called? - ✔✔entrained water 45RBM gear sump oil capacity? - ✔✔0.48 gallons 40 PSI on a 26 trailer is what kind of discrep - ✔✔restrictive NSTM chapter for air compressors? - ✔✔ 551 WHAT ARE TWO TYPES OF MAINTENANCE - ✔✔CORRECTIVE AND PREVENTATIVE after the first 50 hours of running, how many hours past until you change the desalination filter? - ✔✔????
You find something else wrong with the piece of equipment that has already been CASREP'd you should send an? - ✔✔UPDATE WHERE DO YOU FIND THE HIERACHY OF GUIDANCE FOR THE SPECIFICATION PLANS? - ✔✔NEM CH 41 WHICH SPECIFICATIONS MAY BE USED AS GUIDED RESEARCHING TO PROPOSE ENGINEERING CHANGES AND SOLUTIONS? - ✔✔GSO WHERE DO YOU FIND THE AUTHORIZED MATERIAL LIST FOR DECK COVERINGS? - ✔✔NEM CH 634 110 - WPB - 521 - 01, what does 5 21 represent - ✔✔SWBS NUMBER (SHIPS WORK BREAKDOWN STRUCTURE) ETHUSIASM FOR REALISITIC DRILLS MUST OUTWEIGH SOUND JUDGEMENT, OR SOUND EVALUTION OF THE - ✔✔STATE OF THE CREW CASUALITY CONTROL IS USED FOR WHAT TYPE OF CASUALITIES - ✔✔OPERATIONAL AND BATTLE HOW DO YOU HOOK UP AMMETER - ✔✔IN SERIES WHAT DO YOU CLEAN BATTERY TERMINALS WITH? - ✔✔SODIUM BICARBONATE/AMMONIA If a CAN buss has 120 ohm resistors at each end what is the total resistance on the good CAN buss? - ✔✔ 60 OHMS In a DIN what is represented by the letter F? - ✔✔fuse/breaker how would you test a 4 - 20mA sensor - ✔✔in mA, in series
When testing a P1000 pyrometer and you read zero ohms? - ✔✔the center is good/closed installed in all PIM1 and PIM2 cards? - ✔✔MPU how long will a wet cell battery go for off a charge before it needs to be recharged? - ✔✔ 4 - 6 months when using an ammeter to troubleshoot always use the scale - ✔✔highest while during a float charge, the charger monitors what? - ✔✔voltage in a wet cell battery what should the electrolyte level be? - ✔✔3/ in a gel cell battery what is the purpose of the separating plates? - ✔✔separates the pos and neg cells preventing a short circuit a WG of a wire is measured by? - ✔✔the bare wire in the opening of the gauge amperage of the wire is measured in reference to? - ✔✔ 10 and 100 ft lengths the standard for wire manufacturing is? - ✔✔American wire gauge (AWG) how often do zincs last? - ✔✔three months a thrust bearing supports what type of movement? - ✔✔axial With regards to flange shielding on a diesel fuel system, what is considered a hot surface? - ✔✔ 400 degrees F what is a hose shelflife - ✔✔ 10 years
who is responsible for engineering procedures? - ✔✔EO how many decibels for single and double hearing protection? - ✔✔ 84 (single) 104 (double) what happens in a parallel circuit? - ✔✔amperage increases while volts stays the same which hose is not a part of a hose log? - ✔✔outboard hoses should you ever adjust a thermal expansion valve? - ✔✔Never or as little as possible what is the disadvantage of a nonpositive displacement pump? - ✔✔suction lift what does "K" stand for on MTU? - ✔✔relay when should the final shaft alignment be done on surface ships? - ✔✔take with the ship waterborne This type of valve controls the quantity of refrigerant admitted to the cooling coil and reduces the pressure of the refrigerant - ✔✔TXV why are oil heaters provided on AC&R compressors? - ✔✔Reduces the dangers of foaming and also keeps refrigerant out of the oil before using temporary hoses on hydraulic equipment they must be tested to a pressure of atleast? - ✔✔110% POTW hoses should be labelled how many feet - ✔✔ 10 ft a thrust bearing supports what type of movement? - ✔✔axial and radial
which component can be pressure compensated on a non-pressure compensated system? - ✔✔flow control valve With regards to flange shielding on a diesel fuel system, what is considered a hot surface? - ✔✔ 400 degrees what does SSS for a SSS clutch stand for? - ✔✔synchro-self-shifting what are the 4 stages of a basic refrigeration system? - ✔✔compression condesation expansion evaporation what percentage of working pressure do you test a temporary hose to? - ✔✔150% on a honda 150/225 which valve does the VTECH control - ✔✔intake What state is the refrigerant in an AC&R System in which it is in liquid and gas form in the same space - ✔✔saturated when float charging a battery the charger monitors what? - ✔✔voltage what % of hydraulic failure is due to contamination? - ✔✔80% drawings under SWBS #101 refer to? - ✔✔structural drawings what are the three levels of maintenance used in the coast guard? - ✔✔organizational intermediate depot
Drawings under swbs #200 refers to what - ✔✔Propulsion plant DRAWINGS UNDER SWBS #300 REFER TO WHAT? - ✔✔ELECTRICAL DRAWINGS UNDER SWBS #400 REFER TO WHAT? - ✔✔COMMAND AND SURVEILLANCE DRAWINGS UNDER SWBS #500 REFER TO WHAT? - ✔✔PIPING DRAWINGS UNDER SWBS #600 REFER TO WHAT? - ✔✔OUTFITS AND FURNISHINGS HOW MUCH AIR PSI CAN BE STORED IN A RECIEVER? - ✔✔ 600 What rpm does the Honda drop to when there is a loss of oil pressure alarm - ✔✔ 1800 RPM WHAT DO YOU CALL THE WATER FROM THE RO? - ✔✔PERMEATES SFLC MAY AUTHORIZE A DELAY IN OVERHAUL FOR UP TO? - ✔✔20% OF OVERHAUL TWICE WATER TEMP RISE ACROSS AND ENGINE SHOULD NOT EXCEED WHAT? - ✔✔ 10 - 12 DEGREES WHAT IS A DYNAMIC TEST? - ✔✔125% working load limit WHAT IS A STATIC TEST? - ✔✔200% working load limit for 10 minutes PHYSICAL INVENTORIES MUST BE KEPT IN AN AUDIT STATE FOR? - ✔✔ 3 YEARS PLUS CURRENT FISCAL YEAR
WHAT FUELS ARE HONDAS ALLOWED TO USE? - ✔✔86% octane 10% ethynol maximum ppm of water in petroleum hydraulic fluid - ✔✔100? double bourdon tube gauges are mainly use to the measure differences across what? - ✔✔filters two stage filters remove contaminants and what else - ✔✔water? number of interactive queries pages in fedlog? - ✔✔???? bearings that are best for misalignment of shaft deflection? - ✔✔thrust? max air psi in recievers? - ✔✔ 600 honda bf250 oil psi alarm at 1800 rpm - ✔✔25, 23, 15, 10 psi???? compressed gas cylinders hydro statically tested every how many years - ✔✔5, 8, 10, or 12???? how long on the 87 RO do you run in dump after changing filters? - ✔✔10, 15, 30, or 60??? what rpm does bf150 drop to when you get low oil psi alarm - ✔✔2000, 1800, 1500 or idle??? ac generator turning electrical power into mechanical power? - ✔✔electromagnetic induction Boat Inspection Report - ✔✔CG- 3022
what is the time limit place on storage and use of fuel other then F-76/JP-5? - ✔✔ 6 months when should clear and bright be tested in fueling? - ✔✔Before fuel is taken onboard and every 15 minutes thereafter what does the clear and bright test do? - ✔✔identifies water and particulate contamination, and to a limited degree, microbial contamination what is the maximum allowed sediment and water content for fuel? - ✔✔0.05 volume-percent What is the minimum flashpoint for marine fuel required by SOLAS law? - ✔✔ 140 deg F what component in the fuel system removes entrained water? - ✔✔water separators (coalescers) what dyed diesel color is not acceptable for use on Coast Guard Vessels? - ✔✔BLACK what dyed diesel color is used domestically? - ✔✔RED single most effective procedure for maintaining fuel quality? - ✔✔stripping the tanks Disadvantage of centrifugal pumps? - ✔✔Lack of suction lift until the pump has been prime, and sensitivity to variation in head and speed what do you call water trapped in fuel? - ✔✔entrained water what are types on anti friction bearings? - ✔✔roller and ball bearings radial flow pumps produce a flow rate capacity at a head - ✔✔low, high
axial flow pumps produce a flow rate capacity at a head - ✔✔high, low what kind of pumps are most potable water pumps? - ✔✔centrifugal close-coupled type NSTM chapter for firefighting? - ✔✔ch 555 before starting any centrifugal pump was should you ensure? - ✔✔that the pump is fully primed what does an aftercooler do on an air compressor? - ✔✔removing the heat of compression from the air after the last stage of compression thrust bearings are designed to absorb what type of forces? - ✔✔axial what pressure vessel stores air at 600 psig and lower - ✔✔air reciever Low pressure air systems ranges from what psig - ✔✔ 150 and below medium air pressure systems range from what psig - ✔✔ 151 - 1000 psig what pressure vessel stores compressed air above 600 psig - ✔✔air flask high pressure air systems range from what psig - ✔✔ 1000 psig + What will happen if full load is apples to quickly to an engine with new rings or liners installed? - ✔✔Risk of galling pistons, scoring liners, or even piston seizure What is galling - ✔✔Breakdown or build up of metal surfaces due to excessive friction between two parts having relative motion.