While discussing HEVs: Technician A says that in a series hybrid, the engine is only used to power a generator to recharge the batteries. Technician B says that in a parallel hybrid, the engine and/or the battery can supply the power to move the vehicle. Who is correct?   a. Technician A     b. Technician B     c. Both A and B     d. Neither A nor B

technician A says lean ratio of 15:1 to 16:1 provide the best fuel economy. technician B says rich mixture have a ratio below 14.7:1 and provide more power from the engine but greater fuel combustion. who is correct?

Which of the following statements regarding the “Pre-Emission Inspection Check” Of a diesel powered vehicle that is subject to Opacity (Smoke Meter) testing is not true? The governor (if equipped), the exhaust system, and the emissions control devices must all be checked.   The exhaust system must be checked for any missing sections which would prevent collection of a valid exhaust sample.   Vehicles not meeting requirements cannot be inspected. This is not considered an inspection or rejection and no fee is to be charged.   The governor, if originally equipped, must be checked for presence, connection, and operation.

Which of the following statements about vehicles that are subject to Diesel Opacity Emissions (Smoke Meter) Inspection is NOT true? Only diesel powered vehicles with a Gross Vehicle Weight Rating (GVWR) over 8,500 pounds, per New York State Department of Environmental Conservation (DEC) regulations.   “DEMA” will appear on a vehicle's New York State registration to indicate that the vehicle is subject to an opacity smokemeter test (in addition to the safety inspection).   The “DEMA” (Diesel Emissions Metropolitan Area) Counties include Suffolk, Nassau, Queens, Kings, Richmond, New York, Bronx, Westchester & Albany.   Only diesel powere

Describe 2 cases where a Series Hybrid would operate in a pure traction mode and 2 cases where it would operate in a hybrid traction mode.