Ch 16

Tech A says that the cooling system is designed to keep the engine as cool as possible. Tech B says that heat travels from cold objects to hot objects. Who is correct?

neither

Tech A says that when 100% antifreeze is used in the cooling system, the protection level is approximately -70°F. Tech B says that 100% antifreeze will cool the engine better than 100% water. Who is correct?

neither

A coolant serves all of the following purposes except: preventing an engine from overheating while in use. keeping the engine from freezing while not in use in cold climates .reducing friction in the moving parts of the engine .preventing corrosion of the parts in the cooling system.

.reducing friction in the moving parts of the engine

Which hose allows the water pump to circulate the water in the engine when the thermostat is closed, but not when it is open. Bypass hose Throttle body coolant line Overflow hose Radiator hose

Bypass hose

Coolants based on which of these technologies contain a proprietary blend of corrosion inhibitors and are claimed to be compatible with most other types of coolant? IAT HOAT POAT OAT

POAT

All of the following statements are true of a thermostat except: It regulates the flow of coolant. It is a spring-loaded valve controlled by a wax pellet. When the engine is cold, the valve is open; when hot, the valve closes. When installing the thermostat, the jiggle valve should be in the uppermost position.

When the engine is cold, the valve is open; when hot, the valve closes.

Tech A says that when you find coolant hoses collapsed after the engine cools down, the radiator pressure cap has likely failed. Tech B says that the thermostat may have a bleed valve that should be accurately positioned when the thermostat is replaced. Who is correct?

both

When pressurizing coolant: its boiling point increases. the cooling system becomes heavier. the radiator becomes bigger .engine efficiency decreases.

its boiling point increases

The coolant heat storage system: uses a condenser prevents the engine from overheating on hot days. increases hydrocarbon exhaust emissions preheats the engine when the vehicle is started the next time

preheats the engine when the vehicle is started the next time

The movement of heat through space is known as: conduction .radiation. convection .evaporation.

radiation

The surge tank: regulates coolant temperature. prevents coolant leak .reduces engine noise. removes gas from the system.

removes gas from the system

Tech A says that raising the pressure on the cooling system raises the boiling point of the coolant. Tech B says that air-cooled engines operate within a more consistent and ideal temperature range. Who is correct?

tech a

Tech A says that some drive belts are of a stretch fit design and are not adjustable. Tech B says that automatic belt tensioners never wear out. Who is correct?

tech a

Tech A says that the design of a surge tank system helps to purge air from the cooling system. Tech B says that the overflow tank adds coolant to the radiator when the engine is hotter than normal. Who is correct?

tech a

Tech A says that there are a number of coolant types that each has its own life span. Tech B says that mixing of coolants is generally okay, as all coolants use the same chemical base. Who is correct?

tech a

Tech A says that coolant leaking out of the water pump weep hole means the pump is operating normally. Tech B says that the water pump uses centrifugal force to circulate coolant. Who is correct?

tech b

Tech A says that electric cooling fans are used to cause a large airflow over the radiator when the engine is cold. Tech B says that electric cooling fans are used to cause a large airflow over the radiator at low vehicle speeds. Who is correct?

tech b

Tech A says that the thermostat is open until the engine warms up, and then it closes. Tech B says that a faulty radiator cap can be the cause of boiling coolant. Who is correct?

tech b

Which of these is used to force coolant throughout the cooling system in order to transfer heat energy? Water pump Thermostat Radiator Cooling fan

water pump