Automotive Technology: Principles, Diagnosis, And Service (6th Edition) (halderman Automotive Series)
6th Edition
ISBN: 9780135257272
Author: James D. Halderman
Publisher: PEARSON
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Define Diesel Electric Power Plant
Which of the following statements about fuel cells is NOT true?a. A single fuel cell produces very low voltage, normally less than one volt.b. A fuel cell produces electricity through an electro-chemical reaction that combines hydrogen and oxygen to form water.c. A fuel cell is composed of two electrodes coated with a catalyst and separated from each other by an electrolyte and from the case by separators.d. In a fuel cell, catalysts are used to ignite the hydrogen; this causes a release of electrons or electrical energy.
An overheating vehicle is being discussed.
Technician A states that the vehicle may be
overheating because the heater control valve
is stuck closed. Technician B states that the
vehicle may be overheating because the
PCM in not energizing the cooling fan relay.
Who is correct?
Select one:
a. Technician A only
b. Technician B only
c. Both Technicians A and B
d. Neither Technician A nor B
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- How can you identify the high-voltage system in most hybrid vehicles?arrow_forwardOn hybrids with a separate cooling system for the inverter and other electronics, what needs to happen if air is trapped in the cooling system?arrow_forwardWhile discussing working on hybrid vehicles: Technician A says to make sure that the high- voltage system is shut down and isolated from the vehicle before working near or with any high-voltage component. Technician B says that when working on or near the high-voltage system , even when it is de - powered , always use insulated tools. Who is correct ?arrow_forward
- While discussing the reaction by a refrigerant to heat: Technician A says that to absorb heat, the temperature and pressure of the refrigerant are kept low. Technician B says that to dissipate heat, the temperature and pressure are kept high. Who is correct?arrow_forwardAn overheating vehicle is being discussed. Technician A states that the vehicle may be overheating becuase the heater control valve is stuck closed. Technician B states that the vehicle may be overheating because the PCM in not energizing the cooling fan relay. Who is correct?arrow_forwardBelow figure is an air-cooling system for the battery pack. Is this an Active or Passive air-cooling system? What are the main differences between Active and Passive air- cooling system? Cooling Fan Air Intake Air Exhaustarrow_forward
- 19. Small electrical resistance heater mounted inside the combustion chamber of many CI engines, used to preheat the chamber enough so that combustion will occur when first starting a cold engine. a. Heater b. Glow plug c. Induction coil d. Heating coilarrow_forwardWhile performing a cooling system service on a hybrid vehicle; Technician A says it may be necessary to disconnect the electric water pump. Technician B says it may be necessary to disable the high-voltage system before servicing the engine. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forwardDehumidifier is an example of which of the following? Closed System Open System Isolated System None of the abovearrow_forward
- An overheating vehicle is being discussed. Technician A states that coolant in a normal flow cooling system flows from the radiator to the heater core to warm up the passenger compartment quickly. Technician B states that in a reverse flow cooling system, coolant flows to the cylinder heads first, which keeps engine components at a more uniform temperature. Who is correct? Select one: a. Technician A only b. Technician B only c. Both Technicians A andB d. Neither Technician A nor Barrow_forwardWhich of the following statements about PTC heaters is not true? Some vehicles have a PTC heating element in the heater core. Some vehicles have a PTC element installed in an air duct from the blower housing to increase the air temperature in the ducts. PTC heaters are electronically controlled and work with the cooling system to provide hot coolant. PTC elements are small ceramic stones that react quickly to changes in current.arrow_forwardA vehicle is having its water pump replaced. When the water pump is removed, severe corrosion is found on the water pump impeller, and inside the engine. Technician A states that the radiator cap may be overpressurizing the system. Technician B states that the vehicle may have been run with 100% water in the cooling system for some time. Who is correct? Select one: a. Technician A only b. Technician B only c. Both Technicians A and B d. Neither Technician A nor Barrow_forward
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