AMS Review Questions

Based on ABYC Standards, cable attachment to batteries with wing-type nuts is allowed as long as the wire gauge does not exceed:

8 AWG

A LPG locker ventilation must flow: A. Directly overboard B. Into the cockpit C. Into the bilge D. Into the cabin

A

A head located below the vessel's dynamic waterline using raw water for flushing requires a: A. Vented loop between the pump and the head's raw water inlet B. Check valve on its intake C. Strainer on its intake D. Check valve on its discharge

A

A technician is asked to run a fuel supply hose from point A to point B within an engine room space. Which hose should he use? A. A1-15 B. B1 C. A2 D. B2

A

A technician is installing the cable run from the batteries to the main DC panel board on a boat, as part of a refit. The boat has a 12-volt system, and the distance from the panel to the batteries is 15 feet. The maximum current draw from the panel is calculated at 90 amps. What gauge cable should be used at a minimum to maintain Standards compliance? A. 0 AWG B. 2 AWG C. 4 AWG D. 6 AWG

A

A water heater system must have the means of tempering water to: A. 125 B. 130 C. 180 D. 200

A

If a diesel fuel filter equipped with a plastic sight bowl is installed in an engine space, it is desirable to be equipped with: A. A metal heat shield B. Water monitoring device C. Vacuum gauge D. Non-metallic petcock drain

A

Liquid propane gas is: A. Heavier than air B. Lighter than air C. Is a liquid as opposed to a gas, at atmospheric pressure D. All the above

A

On a battery where a hydrometer can be used, a cell reading of 0.050 points of specific gravity below all of the other cells in the battery may indicate: A. A bad cell and battery replacement is needed B. That the other cells have been overcharged C. That cell equalization is needed immediately D. No problem is indicated

A

Some battery manufactures will only consider warranty claims on batteries whose condition has been determined by use of a a. Conductance tester b. Load tester c. Hydrometer d. Megohmmeter

A

Tech A says that AC and DC are able to run together down the same conductor. Tech B says this is technically impossible. Which tech is correct? A. Tech A B. Tech B C. Both techs D. Neither tech

A

The minimum amp circuit breaker that should be used to protect a 120VAC water heater with a 1600 watt element would be rated at ________ amps. a. 15 b. 10 c. 30 d. 20

A

The primary problem with using a series circuit to supply multiple loads is that: A. Voltage drop through the circuit will be excessive B. The capacitance will be excessive C. Amperage draw will be multiplied D. The overcurrent protection device may not work

A

The result of an obstructed holding tank vent during pump out may be: A. A collapsed holding tank B. Raw water flooding C. An explosion D. Tank contamination

A

What piece of equipment is most often not rated for ignition protection? A. Inverter B. Bilge pump C. Bilge blower motor D. Battery switch

A

When performing a pressure drop test at an LPG plumbing fitting using soapy water, it is important that the soap contain no traces of: A. Ammonia B. Chlorine C. Pigment C. Abrasives

A

When removing a split (remote evaporator) air conditioning system, the technician should be aware of: A. The need to properly recover refrigerant B. Federal regulations regarding flammable gasses C. Ignition protection requirements D. Mold and mildew hazards

A

When sizing a fuse for a bilge pump, it is important for the technician to: A. Comply with manufacture recommendations B. Exceed amperage rating by 25% C. Calculate inrush current D. Calculate wire gauge

A

Which are the following components may need to be by-passed for the purpose of decommission? A. Tanks, filters and water heaters B. Strainers, tank and pumps C. Fixtures and line D. Dockside water connections

A

Which of the following are important when selecting a permanently installed engine room gaseous fire extinguishing system? A. Engine compartment volume B. Horsepower C. Fuel type D. Hull material

A

Which of the following is incorrect in a multiple helm station vessel using electronic steering controls? A. Transfer can only be made with the engines shut down B. Indication that the command station has transferred is required C. The steering output position should not change more than 5% of the total steering range D. The system permits station transfer only if the drive is in neutral and at idle.

A

Which of the following is the typically working pressure for an LPG gas system?

A

Which type of variable control can be used with navigation lights? A. No variable control is allowed B. Pulse width modulation (PWM) only C. Resistive control D. SCR controlled only

A

With a Type I sanitation system, waste is: A. Treated and discharged B. Treated and held C. Stored in a holding tank D. Discharged without treatment

A

A vessel is equipped with a rectangular fuel tank that measure 60" long, 30" high and 24" deep. If there are 231 cubic inches in one gallon, what will the capacity of the tank be in gallons? A. 43,200 B. 187 C. 49 D. 153

B

According to ABYC standard H-33, diesel fuels systems with multiple engines and/or multiple tanks: A. Fuel must return to the same tank from which its drawn B. Fueling valves must be labelled as to function and position C. Crossover lines must be above the topmost surface of the tank D. A separate primary fuel filter is required for each engine

B

According to ABYC, a biologically contaminated potable water system should be disinfected with a mixture of chlorine and have a strength of at least: A. 1,000 PPM B. 100 PPM C. 10 PPM D. 1 PPM

B

According to ABYC, acceptable minimum clearing for routing wire near a dry exhaust section in: A. 2 in B. 9 in C. 3 in D. 7 in

B

According to ABYC, all of the following considerations need to be given to evaporator condensate drains except: A. Contain a P-trap to prevent ingress of carbon monoxide B. The diameter of the drain C. Drain overboard or into a bilge area other than that shared by an engine D. Orient the containment pan to facilitate complete drainage

B

An air conditioning starting capacitor may explode if it is: A. Place in intense sunlight B. Energized with a constant line voltage C. Removed too rapidly from an operating circuit D. Allowed to lay on its side

B

An indicator of loss of exhaust cooling water is: A. Not required on generators B. Required on all wet exhaust systems C. Required only on gasoline engines D. Required only on stern drive boats with thru-the-hub exhausts

B

Based on ABYC Standards, a 1000 watt, 120VAC water heater, whose supply cable has a 105C thermal rating, is run outside of the engine room and is bundled with a piece of triplex cable. What minimum size wire gauge will be required to service this circuit? A. 18 gauge B. 16 gauge C. 14 gauge D. 12 gauge

B

Circuit breaks shall: A. Have an audible indicator when tripped B. Have an appropriate interrupt capacity rating C. Be automatically resettable D. Have a safety interlock

B

Contamination of the potable water system with ethylene glycol may be explained by: A. Excessive pump cycling B. Leaking heat exchanger on a water heater C. Nuisance tripping of pump circuit breaker D. Close proximity of engine to water heater

B

For an engine compartment with 400 Cubic feet of volume, the minimum rated exhaust blower capacity shall be: A. 150 CFM B. 300 CFM C. 400 CFM D. 600 CFM

B

Galley stove installations shall: A. Have a continuously light pilot lights B. Have provisions to prevent pots and pans from sliding off C. Be installed so that flexible fuel line limits travel when the boat is heeled D. Be designed so that use of either LPG or CNG is possible without alteration to the stove

B

How much current should flow through the DC grounding conductor in a 25-amp DC motor circuit? A. 25 amps B. 0 amps C. 10 amps D. 5 amps

B

LPG supply lines for multiple appliance installations: A. Can be run in series B. Must be separate lines from the locker to the appliances C. Must be separate lines only within accommodation spaces D. Must be metallic

B

On horse power equals ________ A. 1000 watts B. 746 watts C. 536 watts D. 146 watts

B

Sea cocks, where required, shall: A. Be accessible B. Be readily accessible C. Be gate vales D. Need not be readily accessible if electronically activated

B

Tech A says that a tapered-thread inline ball valve may be directly attached to a straight thread thru hull as a seacock installation. Tech B says that the tapered threads are incompatible and this is not an accepted installation. Which tech is correct? A. Tech A B. Tech B C. Both technicians D. Neither technicians

B

Tech A says that sealed batteries can be mounted anywhere in the boat where space can be found. Tech B says that consideration should be given to ventilation, the mounting surfaces, the surrounding area near the battery and their resistance to acid attack. Which technician is correct? A. Tech A B. Tech B C. Either tech could be correct D. Neither tech is correct

B

The EPA has promulgated regulations regarding evaporative and diurnal emissions for gasoline vessels covered under: A. 33 CFR B. 40 CFR C. UL 1500 D. SAE J1161

B

The best fuse type to use for the DC feed to an inverter is: A. AGC B. Class T C. ANL D. MDL

B

The smallest gauge cable allowed for unsheathed wire runs through a boat is: A. 18 AWG B. 16 AWG C. 14 AWG D. 12 AWG

B

When troubleshooting a fuel supply problem, the technician should measure fuel pump inlet restriction using: A. Visual inspection B. Vacuum gauge C. Pressure gauge D. Fuel flow meter

B

Where required, overcurrent protection devices for generator output conductors shall be rated not to exceed: A. 100% of rated current B. 120% of rated current C. 125% of rated current D. 150% of rated current

B

Which of the following agencies must be referenced when selecting materials for use in a potable water system? A. DOT B. FDA C. USCG D. UL

B

Which of the following would be the moist suitable method of hose attachment? A. Threaded nipple B. Barbed hose adaptor C. Smooth pipe D. Pipe coupling

B

A customer complains of exhaust odor in the accommodation space. The technician should check all of the following except: A. Leaking exhaust system B. Operation of CO monitor C. Engine air intake restriction D. Verify sink and condensate drains are not plumbed into the exhaust

C

According to ABYC A-4, discharging a clean agent portable fire extinguisher directly into a space immediately surrounding the engine without opening the engine access requires a: A. Seacock B. Air intake louver C. Discharge port D. 15 sq. inch access port

C

According to ABYC Standard A-4, which classification of fire extinguisher should be used on an electrical fire? A. Class A B. Class B C. Class C D. Any class will work

C

All pulleys, mountings and cable straps shall be mounted to withstand a minimum force of: A. 225lbs B. 500lbs C. 750lbs D. 850lbs

C

An inflatable boat with an engine power rating greater than 16kW to 75kW is a: A. Type I inflatable B. Type II inflatable C. Type III inflatable D. Type IV inflatable

C

Based on ABYC Standards, cable attachment to batteries with wing-type nuts is allowed as long as the wire gauge does not exceed: A. 4 AWG B. 6 AWG C. 8 AWG D. 12 AWG

C

Based on this section, the most common electrical circuit problem in marine applications is: A. Short circuits B. Too much continuity C. Unwanted open D. Intercircuit shorts

C

Based on what this section has told you, the tool of choice today for tracing short and opening circuits is the: A. Megohmmeter B. Amp clamp C. Potential meter D. TDR

C

Batteries shall meet all of the following requirements except: A. As installed shall not move more than 1" in any direction when subjected to pull force B. Not be installed directly above or below a fuel tank, fuel filter or fittings in a fuel line C. Be shielded so that metallic components cannot come in contact with the grounded terminal D. Have a rated reserve capacity in minutes determine by the calculations in ABYC E-11

C

Conductors of #10 AWG and larger shall be permitted to be connected in parallel __________ A. In any circumstance B. When the individual conductor is insufficient to carry the circuits entire load current C. Where the ampacity of each individual conductor is sufficient to carry the entire load current shared by the parallel conductors D. Under no circumstance

C

Copper tubing is measure by its: A. Schedule B. ID C. OD D. Alloy tolerance

C

On an inverter that does not provide true sine wave output, low voltage troubleshooting must be accomplished using a(n)__________-type DVOM. A. Analog B. Average responding C. True RMS D. Oscillating

C

Replacement of a failed engine sea water pump impeller should normally include: A. Draining the water-lift muffler B. Flushing the heat exchanger C. Checking all downstream components for all impeller pieces D. Replace zincs

C

Tech A says that crushed or restricted ducting causes icing in the evaporator. Tech B says that dirty air filters at the evaporator cause icing. Which tech is correct? A. Tech A B. Tech B C. Both techs D. Neither tech

C

Tech A says that voltage supplied to the rotor controls alternator output voltage. Tech B says that the alternator output is proportional to the rotor voltage. Which technician is correct? A. Tech A B. Tech B C. Both techs D. Neither tech

C

The best standard to reference with questions related to fire protection on boats is: A. E-11 B. A-27 C. A-4 D. H-33

C

The gasoline fuel system of a 28' boat shall prevent spit back of fuel when filled at a rate of: A. 10 GPM B. 14 GPM C. 18 GPM D. 28 GPM

C

The maximum sustained charging voltage acceptable to some gel cell battery manufactures is: A. 13.8V B. 14.5V C. 14.1V D. 13.2V

C

The metallic case of the battery charger should be connected to the: A. Isolated DC negative output B. Engine room bulkhead grounded terminal C. DC ground system

C

The minimum number of jack stands needed to support a 32' sailboat is: A. 4 B. 5 C. 6 D. 8

C

The purpose of a hydraulic steering actuator is to: A. Transform mechanical energy into hydraulic energy B. Store mechanical energy C. Transform hydraulic energy into mechanical energy D. Increase mechanical energy

C

Traditional battery load testing methods dictate that a load equivalent to _____% of the battery's CCA rating be placed on the battery. A. 25 B. 30 C. 50 D. 100

C

What material is recommended for clamping conductors over engines and moving machinery according to ABYC? A. PVC B. Nylon C. Metal D. Any of the above material is acceptable

C

When bleeding a hydraulic steering system, which of the following would not be taken into account? A. Presence of an autopilot pump B. Type of fluid C. Ambient temperature D. Location of the bleed fittings

C

When inspecting fuel hoses, the technician should check for each of the following except: A. Hose condition including cracking, bulges or chafing B. Double hose clamps on the fuel fill hose C. Fuel hoses running under bilge water D. Hoses labelled in accordance with ABYC H-24

C

When testing for excessive EMF emission near a conductor or appliance, the tool of choice is a(n): A. Ohmmeter B. DVOM C. Gauss meter D. infrared sensor

C

Which of the following characteristics is not a characteristic of a gear pump? A. Self priming B. Positive displacement C. Can be operated against a closed valve D. Susceptible to particulate contamination

C

A designated occupant position is: A. A stand or seated area with a minimum width of 16" B. Illustrated by boat manufacturer in literature or placard C. Is not required D. Both A and B

D

A voltage regulator controls which of the following? A. Alternator rotor internal resistance B. Alternator AC ripple voltage C. A battery's self discharge rate D. Alternator field voltage

D

According to ABYC Standards, a check valve is allowed to be installed in a bilge pumps discharge line to: A. Prevent sea water from entering back into the boat B. When using a discharge manifold system for multiple pumps C. Prevent the ingress of carbon monoxide into the bilge D. Prevent bilge pump cycling

D

All of these considerations must be given to the electrical components of a bilge pump installation except: A. Wire gauge sizing B. Overcurrent protection C. Continuous power to the automatic switch D. Audible indicator of pump operation

D

Battery chargers shall meet all of the following requirements except: A. Meet the applicable requirements of UL 1236 B. Be of the automatically controlled type C. Be provided with an ammeter or an alternative indicator for measuring the output current D. Pass the 2.5 minute fire test

D

DC grounded conductors on new boats that are also equipped with AC systems should use what color of insulation? a. Light Blue b. Black c. Red d. Yellow

D

Excessive electrical resistance can be cause by _________ A. Oversized conductors, loose terminals and corrosion B. Improper wiring insulation and excessive wire strand count C. Fuses with too high of a rating and wattage that is too low D. Undersized wire, loose connections and corrosion

D

For installation of battery chargers and inverters, the case ground should be _________ conductor. A. One size larger than the AC grounding B. The same size as the AC neutral C. The same size as the AC grounding D. No smaller than one size under the largest DC positive conductor

D

For sanitation storage, which material is most suitable? A. Aluminum B. Mild steel C. Galvanized steel D. Polythylene

D

Friction connectors are required to pass a minimum ____ pull test according to ABYC E-11: A. 10lbs B. 3lbs C. 20lbs D. 6lbs

D

Fuel line quick disconnect shall: A. Require a manual shut off valve B. Not be used C. Be within 12" of the engine D. Automatically shut off fuel flow

D

On a gasoline powered vessel, when is an additional exhaust blower required? A. When a second propulsion engine is installed B. When a generator is installed in a compartment separate from the propulsion engine C. When a generator is installed in the same compartment as a single propulsion engine D. Both A and B

D

On a mechanical cable over sheave steering system, attachment of the cable clamps (bulldog) must take into account all of the following except? A. Cable Size B. Orientation of the clamp C. Location of the clamp D. Vessel Type (sail v. power)

D

On engine exhaust systems, double hose clamps are required on exhaust hose installed: A. Between the muffler and exhaust terminus B. On the generator muffler C. On the main engine muffler D. All of the above

D

Sheathed ungrounded conductors connected directly to a battery must have overcurrent protection devices located within inches of the connection to the battery. a. 7 " b. 36" {slightly less than 1 meter) c. 40 " d. 72"

D

The maximum number of terminals allowed to be attached to any one terminal stud based on ABYC Standards is: A. 1 B. 2 C. 3 D. 4

D

The maximum spacing for cable run support based on ABYC is: A. 10" B. 12" C. 16" D. 18"

D

The primary byproduct of excessive electrical resistance is: A. Increased amperage B. Increased voltage C. Reduced ambient temperature D. Heat

D

To check for charger output to the battery, de-energize charger, check battery open circuit voltage, re-energize the charger and check for a voltage of _______ vdc or more. A. Rise of 14 B. Drop of 0.5 C. Drop of 14 D. Rise of 0.5

D

Ungrounded battery cables without overcurrent protection, i.e. engine cranking circuit cables, shall be installed: A. To avoid contact with metallic fuels system components B. To avoid contact with any part of the engine or drive train C. Above the normal bilge water levels D. All of the above

D

When installing a paddle-type float switch, consideration should be given to all of the following except: A. Orientation B. Height C. Wiring connections D. Activation method

D

When installing an inverter in a split bus application, it is important to provide: A. An isolated hot bus B. Large inductive loads C. An isolated neutral bus D. Both A and C

D

Which of the following criteria does not need to be considered as part of a proper seacock installation on recreational boats in the US? A. Readily accessible B. Handle orientation C. Drain orientation D. Double hose clamps

D

Which of the following sanitation pumps could be run dry without damage? A. Centrifugal B. Flexible impeller C. Vane D. Piston

D