Cooling Homework Flashcards
Technician A says a temperature-controlled fan clutch is controlled by a spring that shrinks when it is heated and expands when it is cooled. Technician B says that electric fans found on many late model cars sometimes run after the engine is shut off. Who is correct?
Technician B
Technician A says coolant is disposed of as hazardous waste. Technician B says ethylene glycol is flammable at room temperature. Who is right?
Technician A
All of the following are examples of the cause of electrolysis, EXCEPT _____.
triazoles
A thermostat is installed with its temperature bulb facing the radiator.
False’.
Technician A says water will absorb more heat than ethylene glycol. Technician B says permanent antifreeze/coolant does not evaporate. Who is right?
Both technicians
Technician A says aluminum oxide forms if the coolant becomes too diluted with water. Technician B says the thermostat on all engines remains closed until its predetermined opening point. Who is correct?
Both technicians
The purpose of a pressure test is to__________.
Find the source of a leak
Two Technicians are discussing thermostats. Technician A says a stuck open thermostat will cause coolant loss. Technician B says a stuck open thermostat will cause poor heater performance. Who is correct?
Technician B only
What are the types of radiators?
Downflow, Crossflow
A thermostat in the cooling system helps prevent_________.
Overheating, Overcooling
Water pumps are sometimes driven by the timing belt.
‘True’
What instrument can determine the coolant’s conductivity
a voltmeter
Technician A says that for each pound of pressure on the cooling system, the boiling point raises one degree Fahrenheit. Technician B says engine rebuilders epoxy heat tabs to the cylinder heads to protect against dishonest warranty claims. Who is correct?
Technician B
The jiggle pin or check valve in a thermostat helps bypass coolant as the temperature rises.
False
Cavitation means air bubbles form in the coolant and then collapse.
True’
