WorksheetsG12 Q1 Automotive
Total questions: 60
Worksheet time: 48mins
Which type of cooling system uses coolant to transfer heat from the engine to the radiator?
Air cooling
Liquid cooling
Gas cooling
Vacuum cooling
What part of the cooling system acts as a heat exchanger?
Fan
Radiator
Thermostat
Water jacket
The cooling system helps in:
Increasing fuel consumption
Preventing engine overheating
Reducing coolant flow
Weakening combustion
Which belt transmits power between the water pump and crankshaft?
Drive belt
Fan belt
Timing belt
Radiator belt
The most common location of a thermostat in an engine is:
Behind the radiator cap
On top of the engine block
Under the cylinder head gasket
Inside the oil pan
A thermostat begins to open at its:
Rated temperature
Idle speed
Maximum combustion rate
Freezing point
A thermostat functions like:
Spark plug
Heat-operated valve
Water jacket
Pressure cap
When the engine is cold, the thermostat is:
Open
Closed
Half-open
Stuck
Which device identifies leakage due to a cracked cylinder head or gasket?
Radiator cap
Pressure tester
Combustion analyzer
Feeler gauge
Which instrument uses UV light to detect coolant leaks?
Pressure gauge
Fluorescent dye tester
Radiator cap
Torque wrench
If the cylinder head is defective, what leaks into the cooling system?
Oil
Combustion gases
Air-fuel mixture
Transmission fluid
Acid formation in the cooling system corrodes the:
Radiator
Fan
Belt
Thermostat gasket
The heart of the cooling system is the:
Radiator
Fan
Water pump
Thermostat
What drives the water pump?
Battery
Crankshaft belt
Ignition system
Cooling fan
A water pump seal may fail due to:
Belt adjustment
Shaft corrosion
Fan clutch leak
All of the above
A water pump can circulate up to how many gallons of coolant per hour?
1500
3500
7500
10000
Coolant additives prevent:
Overheating
Corrosion
Scale formation
All of the above
Additives must be applied according to:
Mechanic's preference
Manufacturer's specifications
Coolant color
Temperature outside
Coolant additives are usually mixed in what ratio with water?
10:90
30:70
50:50
70:30
Applying coolant additives helps in:
Fuel efficiency
Preventing engine knock
Preventing scale/rust
Increasing oil pressure
What PPE is required when servicing a cooling system?
Gloves and goggles
Helmet only
Safety shoes only
None
Before removing a radiator cap, you should:
Loosen thermostat
Allow engine to cool
Disconnect fan belt
Open drain plug first
Which standard procedure prevents coolant spillage during draining?
Using a container
Using a thermometer
Using a tester
Using a hammer
A blocked radiator can cause:
Better cooling
Engine overheating
Thermostat malfunction
Drive belt slip
The thermostat regulates the flow of coolant between the engine and radiator.
TRUE
FALSE
The water pump is responsible for cooling the radiator fan.
TRUE
FALSE
Excessive cooling capacity increases engine efficiency.
TRUE
FALSE
Air cooling systems use fins and blowers to dissipate heat.
TRUE
FALSE
A thermostat should be removed to improve cooling efficiency.
TRUE
FALSE
Most thermostats open at around 85°C-91°C.
TRUE
FALSE
A thermostat is a control device that automatically reacts to temperature changes.
TRUE
FALSE
Thermostat testers are not used in the automotive industry.
TRUE
FALSE
Combustion leaks in the cooling system can cause strong acids.
TRUE
FALSE
Internal leaks are easier to detect than external leaks.
TRUE
FALSE
Coolant leaks can be diagnosed using sight, smell, and hearing.
TRUE
FALSE
A faulty radiator cap cannot cause leakage.
TRUE
FALSE
A broken water pump impeller can reduce cooling efficiency.
TRUE
FALSE
Cast iron water pumps are more durable than aluminum ones.
TRUE
FALSE
A leaking fan clutch can contribute to water pump failure.
TRUE
FALSE
Water pumps have no effect on engine overheating.
TRUE
FALSE
Coolant additives increase boiling point of the liquid.
TRUE
FALSE
Tap water is the best substitute for coolant additives.
TRUE
FALSE
Additives reduce cavitation in the water pump.
TRUE
FALSE
Coolant additives are optional in maintaining modern engines.
TRUE
FALSE
Hot coolant under pressure can cause burns.
TRUE
FALSE
Cleaning the workplace is not part of OHS standards.
TRUE
FALSE
Running an engine without coolant is safe for short distances.
TRUE
FALSE
Overheating can damage the cylinder head gasket.
TRUE
FALSE
Space between the cylinder block walls where coolant circulates.
(a)
Component that pulls or pushes additional air through the radiator.
(a)
Part of the cooling system that houses the thermostat.
(a)
Gasket that seals the thermostat in place.
(a)
Tool used to check for exhaust-gas leakage into the cooling system.
(a)
Leakage test that involves applying pressure inside the cooling system.
(a)
Rotating part of the water pump that moves coolant.
(a)
One common cause of water pump failure.
(a)
Chemical commonly used as antifreeze in coolant.
(a)
Additives that lubricate the water pump.
(a)
Tool used to tighten hose clamps.
(a)
Device that measures clearance in engine parts.
(a)
