(Guide) |ASE (Entry level technician prep) - Electrical A6 |Questions and answers|2023|

(Guide) |ASE (Entry level technician prep) - Electrical A6 |Questions and answers|2023| A circuit breaker is removed from a functioning power seat circuit, and an ohmmeter is connected to the circuit breaker terminals. Technician A says the ohmmeter should provide an infinite reading if the circuit breaker is satisfactory. Technician B says the ohmmeter current may cause the circuit breaker to open. Who is right? A) A only B)B only C)Both A and B D)Neither A nor B Answer D is correct! An infinite reading on an ohmmeter indicates there is an open. A good circuit breaker is closed until high current flows through it, then it is open. A good circuit breaker will have zero resistance. When performing a battery hydrometer test: A) if the battery temperature is 0 deg F (-17.7 deg C), 0.050 should be subtracted from the hydrometer reading. B) if the battery temperature is 120 deg F (48.9 deg C), 0.020 should be subtracted from the hydromter reading. C) the maximum variation in cell hydrometer readings is 0.050 specific gravity points. D) The battery is fully charged if all cell hydrometer readings exceed 1.225 Answer A is correct! The hydrometer measures the specific gravity of the battery's electrolyte. This measurement gives an indication of the battery's state of charge. The reading is quite simple to take, but it must be adjusted according to the temperature. The base temperature for this reading is 80 deg F. When the temperature is below that, 0.004 should be subtracted from the measurement for every ten degrees below 80. The battery voltage is disconnected from the electrical system in a vehicle with many onboard computers. This procedure may cause: A) damage to all the computers. B) the engine to not start. C) erasure of the computers' adaptive memories. D) voltage surges in the electrical system. Answer C is correct! Correctly disconnecting the battery on late-model vehicles will not cause any problems to the computer or the vehicle itself. The only thing that will happen is that item held in memory by the computers and accessories will disappear.