Chapter 12 Test: Cooling System and Climate Control
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Last updated 4 months ago
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Explain the pathway that coolant takes in a car and name the various components.
What senses the temperature of the coolant and allows the fluid to enter or exit the radiator?
a. radiator hose
b. water pump
c. thermostat
d. radiator cap
What happens when pressure is increased in the cooling system by using a radiator cap?
a. increases the boiling point of the coolant
b. decreases the boiling point of the coolant
c. keeps the boiling point constant
d. changes the water to antifreeze ratio in the coolant
What is used to attach the radiator hose to the radiator?
a. clamp
b. glue
c. tape
d. machine screw
Approximately what temperature will the antifreeze FREEZE if mixed 50% water and 50% antifreeze?
a. 212ºF (100ºC)
b. 122ºF (50ºC)
c. 32ºF (0ºC)
d. -34ºF (-37ºC)
Which of the following is like a mini radiator to help with heating the passenger cabin?
a. cabin air filter
b. heater core
c. compressor
d. evaporator
What forces the coolant to flow throughout the engine?
a. air from the front of the car
b. water jacket
c. radiator fins
d. water pump
What is the purpose of the radiator?
a. remove heat from the coolant
b. add heat to the coolant
c. slow down the air through the engine compartment
d. keep the coolant at 195ºF (91ºC)
Charge-air coolers (intercoolers and aftercoolers) are air-to-air or air-to-liquid ____________.
a. heat collectors
b. heat exchangers
c. cold air returns
d. hot air returns
Cooler air is ____________, allowing more air and fuel to go into the combustion chamber which leads to more power.
a. more turbulent
b. cloudy
c. less dense
d. denser
What type of water pump is run by electronic controls, only circulating coolant when needed?
a. gear driven water pump
b. conventional belt driven mechanical water pump
c. electric water pump
d. timing belt driven water pump
Overheating an engine can cause serious damage. One technology called fail-safe cooling allows you to drive the vehicle if it begins to overheat. How does it work?
a. It deactivates alternating cylinders in the engine, pumping in air to cool them.
b. It transfers cool air from the air conditioning system and injects it into the radiator.
c. Coolant is injected directly into the cylinders.
d. Oil is pumped into the cylinders.
Which if the following would be the most acidic on the pH scale?
a. 3
b. 6
c. 7
d. 10
Technician A says if the coolant is low the engine can overheat. Technician B says that if the fan is not working properly the engine can overheat. Who is correct?
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither Technician A nor Technician B
Technician A says that most vehicles require 100% pure antifreeze in the coolant system. Technician B says that a 50% antifreeze/50% water mixture is used for most cars. Who is correct?
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither Technician A nor Technician B
Technician A says that hot coolant enters the top of the radiator. Technician B says that the coolant is cooler at the bottom of the radiator than at the top. Who is correct?
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither Technician A nor Technician B
Technician A says that a coolant recovery tank is used to hold excess coolant during cooling system operation. Technician B says that the coolant recovery tank allows the air to be drawn into the engine block, enhancing the cooling in the engine. Who is correct?
a. Technician A
b. Technician B
c. Both Technician A and Technician B
d. Neither Technician A nor Technician B
Technician A says that coolant mixes with the engine oil to help with cooling. Technician B says most front wheel drive vehicles use belt driven fans. Who is correct?