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3E052

Vol 5

QuestionAnswer
(001) Where should the coolant level be if the generator is not equipped with a recovery tank? Two inches from the bottom of the filler neck.
What should you add if you find a lead acid battery that has low electrolyte in the cells? Distilled Water.
Which component do you use to adjust the voltage to the desired value on an Onan Voltage-adjusting rheostat.
How can you often determine that an electrical system is getting hot? It creates a smell before you can see anything
If the engine does not shut down when the fuel is shut off, what should you shut off next? Air supply.
What must you do before you check the oil level during a postoperational inspection? Let the engine stand for several minutes.
What do you not check during a post-operational inspection? Coolant level
What form is used for the operation of all standby generators? AF Form 487, Emergency Generator Operating Log (Inspection Testing).
If the engine runs more than one hour, how often must you record readings on the back of the AF Form 487, Emergency Generator Operating Log (Inspection Testing)? 2 hours.
How long do you maintain the AF Form 719, Historical Record—Diesel-Electric Generator and System, on a generator? Life of the unit.
You are operating a single-phase generator producing 240 VAC with an amperage draw of 53 amperes. You need to calculate the kW of the generator. Round it to the nearest kW. 10.
You are operating a single-phase generator producing 120 VAC with an amperage draw of 75 amperes. You need to calculate the kW of the generator. Round it to the nearest kW. 7.
You are operating a three-phase generator that produces 120/208 volts. Phase 1 reads 135 amperes, phase 2 reads 130 amperes, and phase 3 reads 134 amperes. You need to calculate the kW of the generator. Round it to the nearest kW. 38.
You are operating a three-phase generator that produces 120/208 volts. Phase 1 reads 95 amperes, phase 2 reads 100 amperes, and phase 3 reads 93 amperes. You need to calculate the kW of the generator. Round it to the nearest kW. 28.
You are operating a three-phase generator that produces 120/208 volts with 100 kW on its power meter but does not have an ammeter. What is the amperage? Round it to the nearest ampere. 347.
You are operating a three-phase generator that produces 120/208 volts with 74 kW on its power meter but does not have an ammeter. What is the amperage? Round it to the nearest ampere. 257.
You are operating a single-phase generator that produces 240 VAC with 15 kW on its power meter but does not have an ammeter. What is the amperage? Round it to the nearest ampere 78.
You are operating a single-phase generator that produces 120 VAC with 63 kW on its power meter but does not have an ammeter. What is the amperage? Round it to the nearest ampere. 656.
For normal operation at a fixed generator site, you need to maintain enough fuel for how long and under what load? Three days under full load.
During a monthly inspection, a fixed generator is required to operate for how long and under what load? One hour under the facility load.
Doing the annual inspection completely and accurately will increase the life of a generator by up to what percent? 50.
When the load is connected to the emergency source, what color is the indicator lamp on an Onan automatic transfer panel? Red.
Which of these is an important component of the electronic control system on an Onan automatic transfer panel? Transfer switch assembly
The range of adjustment on the Onan retransfer time-delay relay is 0 to 30 minutes.
What is the pickup setting of the overvoltage sensor adjusted to on an Onan automatic transfer panel? 105 to 135 percent of the nominal voltage.
Which component on the Onan automatic transfer panel gives a warning that a transfer or retransfer is about to occur? Signal module.
Which of these is not an alarm circuit on the 10-ampere battery charger for an Onan automatic transfer panel? DC (charger output) failure.
What position must the motor disconnect switch be in for automatic operation? Auto.
In automatic mode, when will the generator start and transfer load to the emergency source? When a power interruption occurs on any of the three phases of normal power.
For manual operation, what position must the motor disconnect switch be in before moving the manual transfer handles? Off.
What is the most common material we see used in cables? Copper.
What type of coding is placed on a conductor to identify the type of insulation and what the appropriate use is for the conductor? Combination of letters, numbers and symbols.
The voltage reconnection panel allows the alternator windings to be connected in? either series or parallel.
What can happen if you attempt to change the position of the voltage reconnection panel while the generator set is operating? Electrocution.
How is the movable portion of the reconnection panel adjusted to produce the desired voltage output? Align its arrow with the desired stationary board arrow.
What must you change if you find the phase rotation is different from the primary power source? Any two leads.
What do you use to perform maintenance on a mobile electric power (MEP) generator at a bare base site if you are working in the dark? Headlights and a flashlight.
What position do we place the battle short switch in during a preoperational inspection on a MEP series generator? OFF.
What lubrication systems pressure will illuminate the low oil pressure indicator during engine operation? 15 ± 3 psi.
When starting a mobile electric power (MEP) series generator, hold the master switch in the START position until the voltage is near normal level, the engine speed has stabilized, and the oil pressure reaches at least 25 psi.
During an emergency operation, you can apply load after how many minutes of warm-up? 0.
What indicates that a generator is at full load? Ammeter is at 100 percent.
Who assists balancing the load that has more than 10 percent difference between the phases? Electricians.
After each load change, check the generator for load, voltage, and frequency.
Why is the load bank allowed to operate for five minutes after the generator has reached no load? To cool down.
What is it called during those times of day when customers consume a greater amount of electricity? Peak demand periods.
When the possibility of large fluctuating load changes exists, at what percentage of the running unit’s capacity do you parallel another unit into the load? 50 percent or more.
What does the phase relationship of the output of two generators refer to as being the same? Instantaneous voltage value.
What load division corrections should you make if the load is different and the bus frequency is low? Raise fuel to the low load generator.
What load division corrections should you make if the load is the same and the bus frequency is high? Lower fuel to all generators.
What is it called if currents flow from one generator to another when generators operate in parallel? Crosscurrents.
When operating a MEP generator, when do you release the MASTER switch to the PRIME and RUN position? Oil pressure has reached at least 25 psi and voltage and frequency have developed.
When operating a generator in extreme cold conditions, what step should you take to prevent batteries from freezing? Keep them fully charged.
When operating a generator in extreme cold conditions, what step should you take to reduce the accumulation of moisture in the fuel system? Keep the fuel tanks as full as possible.
When operating a generator in extreme heat conditions, what step should you take to prevent the generator from overheating? Close all doors and panels during operation.
During a mobile electric power (MEP) generator monthly inspection, the fuel level needs to be sufficient to last how long? Three days of operation.
During a monthly inspection, operate the mobile electric power (MEP) series generator under load using a load bank for one hour.
During the mobile electric power (MEP) series generator annual inspection, check all of the cannon plugs to make sure they are. securely fastened.
During the mobile electric power (MEP) series generator annual inspection, what maintenance is done to the mobilizers? Remove the wheels and pack the bearings with grease.
What are load banks equipped with to provide a simulated load to a generator? Resistive type heating elements and cooling fans.
What load bank component contains reconnection bars that must be removed and configured according to the voltage input from the generator? Voltage reconnection panel.
What load bank component is a series of switches used to select a specific resistive load value from your generator? kW load step switches.
What load bank component is used to check voltage between phases of generator output during three-phase operation? Volts select switch.
What load bank component activates to open the master load switch if the blower fails? Safety airflow switch.
What is the purpose, besides preventing carbon buildup, of operating a generator using a load bank? It lets you know that the generator is capable of operating at full load.
What must be done to the connections if you must connect the load bank cables to the ends of the generator output cable? Wrap the connections with insulating tape.
You know what voltage to set the load bank to before operating it by checking the? voltage reconnection terminal board on the generator.
How will you know where to place the reconnection bars to set them for the proper voltage? A diagram of configuration on the load bank.
Created by: rentedred
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