Automotive Technology
Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Chapter 54, Problem 6ASRQ

While discussing the future use of CO2 as a refrigerant: Technician A says that CO2 is nontoxic and presents little threat to the environment. Technician B says that only slight changes from conventional systems will be required because CO2 systems operate at low pressures and temperatures. Who is correct?

  1. Technician A only

  • Technician B only
  • Both A and B
  • Neither A nor B
  • Blurred answer
    Students have asked these similar questions
    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?
    Two cylinders of refrigerant have the pressure of 50 psig and 110 psig.  A technician decides       the refrigerants are contaminated and wants to combine them in one tank to be sent out.     The tank the mixture will go in is rated for 400 psig.  This tank already has 200 psig in it.  What will be the total pressure when the refrigerants are mixed?        ______________ psig
    1-While refilling an 8-quart (7.57 L) system with coolant: Technician A initially puts in 4 quarts (3.78 L) of straight coolant and tops it off with water. Technician B fills the system with the correct mixture, tightens the radiator cap, and then checks for leaks. Who is correct? 2-While checking for conditions that might cause coolant electrolysis: Technician A places the positive lead of a voltmeter into the coolant and connects the negative lead to a ground. Technician B checks for the presence of voltage in the coolant with the ignition off. Who is correct? 3-Technician A says that if the PCV valve or connecting hoses become clogged, excessive pressure will develop in the crankcase and can cause oil leaks. Technician B says that if the PCV valve or connecting hoses become clogged, oil may be pushed into the air cleaner or cause it to be drawn into the intake manifold. Who is correct?  4-While bleeding air from a cooling system: Technician A loosens a heater hose at its highest…

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