ASE 1-180 Exam Questions with 100%
Correct Answers | Already Graded A+
The automotive repair process is a six step process. What is the last step in
that process? - ✔✔verifying the repair
A vehicle comes in the shop with an engine noise. What should be done
first? - ✔✔discuss the noise with the vehicle owner
A spark ignition engine has a flapping sound near the front. Which of the
following could be the cause? - ✔✔loose timing belt
A tight timing belt makes what type of noise? - ✔✔whining sound
An orange colored liquid is found under the front of the engine. What is
leaking? - ✔✔coolant
There is a blue fluid beneath vehicle. The fluid is most likely
______________. - ✔✔windshield washer fluid
The use of what type of diesel fuel is critical to diesel exhaust fuel used in
SCR (selective catalyst reduction) systems? - ✔✔Ultra Low Sulfur Diesel
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
,The DEF (diesel exhaust fuel) is added at what location on a light duty
diesel powered vehicle? - ✔✔fitting near fuel door
Two technicians are discussing DEF (diesel exhaust fluid). Technician A
says it is acceptable to add water to the DEF. Technician B says you can
use a refractometer to measure the density and quality of the DEF. Who is
right? - ✔✔B only
Two technicians are discussing engine coolant. Technician A says a weak
solution of antifreeze may cause corrosion build-up in the cooling system.
Technician B says some original equipment manufacturers (OEM)
recommend that the coolant be changed at specified intervals. Who is
right? - ✔✔Both A and B
When flushing and refilling a cooling system, all of the following steps are
necessary, EXCEPT: - ✔✔mixing tap water and distilled water
What tool is used to measure engine coolant freeze protection? -
✔✔hydrometer
Two technicians are explaining radiator cap service. Technician A says a
radiator cap s tested using a cooling system pressure tester. Technician B
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
,says when the radiator cap does not hold enough pressure, you can
replace the cap gasket. Who is correct? - ✔✔A only
Two technicians are describing the replacement of a thermostat.
Technician A says the upper hose should be removed from the thermostat
housing neck then you remove the housing to replace the thermostat.
Technician B says on some applications you remove the radiator pressure
cap and install a new thermostat into the engine radiator fill tube
underneath the pressure cap. Who is right? - ✔✔Both A and B
Technician A says to replace the engine cooling thermostat once a year.
Technician B says the lower radiator hose contains a spring to prevent it
from collapsing and causing a restriction. Who is right? - ✔✔B only
Technician A says you should inspect all types of fan blades for stress
fractures. Technician B says that if there are signs of silicone residue at the
viscous mechanical clutch, the fan clutch must be replaced. Who is right? -
✔✔A only
The engine water pump is going to be replaced. Which of following is done
as part of that repair process? - ✔✔drain the coolant below the water pump
level
3
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, Two technicians are discussing an oil change. Technician A says synthetic
oils provide a safe way to exceed the manufacturer's recommended oil
change intervals. Technician B says to consult the on-line service
information or owner's manual for the correct viscosity and amount of oil.
Who is right? - ✔✔B only
The figure shows a belt tensioner with four lines, which indicates proper
tension, belt wear, and/or the need for replacement. Technician A says
when a new belt is installed, the three line marks close to each other
should be positioned as sown in the figure which indicates the belt is
properly tensioned. Technician B says to always check the on-line service
information for the belt wear indicators. Who is right? - ✔✔B only
An engine has an oil leak at the valve cover. The technician has replaced
the valve cover gasket but the oil still leaks out. What is the MOST likely
cause? - ✔✔Stuck PCV (Positive Crankcase Ventilator) valve
Technician A says most OEMs (original equipment manufacturers)
recommend an oil change interval of 7,500 to 12,000 miles, or every 6
month. Technician B says oil change intervals are controlled electronically
through an oil life monitor on the dash. Who is right? - ✔✔Both A and B
4
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
Correct Answers | Already Graded A+
The automotive repair process is a six step process. What is the last step in
that process? - ✔✔verifying the repair
A vehicle comes in the shop with an engine noise. What should be done
first? - ✔✔discuss the noise with the vehicle owner
A spark ignition engine has a flapping sound near the front. Which of the
following could be the cause? - ✔✔loose timing belt
A tight timing belt makes what type of noise? - ✔✔whining sound
An orange colored liquid is found under the front of the engine. What is
leaking? - ✔✔coolant
There is a blue fluid beneath vehicle. The fluid is most likely
______________. - ✔✔windshield washer fluid
The use of what type of diesel fuel is critical to diesel exhaust fuel used in
SCR (selective catalyst reduction) systems? - ✔✔Ultra Low Sulfur Diesel
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
,The DEF (diesel exhaust fuel) is added at what location on a light duty
diesel powered vehicle? - ✔✔fitting near fuel door
Two technicians are discussing DEF (diesel exhaust fluid). Technician A
says it is acceptable to add water to the DEF. Technician B says you can
use a refractometer to measure the density and quality of the DEF. Who is
right? - ✔✔B only
Two technicians are discussing engine coolant. Technician A says a weak
solution of antifreeze may cause corrosion build-up in the cooling system.
Technician B says some original equipment manufacturers (OEM)
recommend that the coolant be changed at specified intervals. Who is
right? - ✔✔Both A and B
When flushing and refilling a cooling system, all of the following steps are
necessary, EXCEPT: - ✔✔mixing tap water and distilled water
What tool is used to measure engine coolant freeze protection? -
✔✔hydrometer
Two technicians are explaining radiator cap service. Technician A says a
radiator cap s tested using a cooling system pressure tester. Technician B
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
,says when the radiator cap does not hold enough pressure, you can
replace the cap gasket. Who is correct? - ✔✔A only
Two technicians are describing the replacement of a thermostat.
Technician A says the upper hose should be removed from the thermostat
housing neck then you remove the housing to replace the thermostat.
Technician B says on some applications you remove the radiator pressure
cap and install a new thermostat into the engine radiator fill tube
underneath the pressure cap. Who is right? - ✔✔Both A and B
Technician A says to replace the engine cooling thermostat once a year.
Technician B says the lower radiator hose contains a spring to prevent it
from collapsing and causing a restriction. Who is right? - ✔✔B only
Technician A says you should inspect all types of fan blades for stress
fractures. Technician B says that if there are signs of silicone residue at the
viscous mechanical clutch, the fan clutch must be replaced. Who is right? -
✔✔A only
The engine water pump is going to be replaced. Which of following is done
as part of that repair process? - ✔✔drain the coolant below the water pump
level
3
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, Two technicians are discussing an oil change. Technician A says synthetic
oils provide a safe way to exceed the manufacturer's recommended oil
change intervals. Technician B says to consult the on-line service
information or owner's manual for the correct viscosity and amount of oil.
Who is right? - ✔✔B only
The figure shows a belt tensioner with four lines, which indicates proper
tension, belt wear, and/or the need for replacement. Technician A says
when a new belt is installed, the three line marks close to each other
should be positioned as sown in the figure which indicates the belt is
properly tensioned. Technician B says to always check the on-line service
information for the belt wear indicators. Who is right? - ✔✔B only
An engine has an oil leak at the valve cover. The technician has replaced
the valve cover gasket but the oil still leaks out. What is the MOST likely
cause? - ✔✔Stuck PCV (Positive Crankcase Ventilator) valve
Technician A says most OEMs (original equipment manufacturers)
recommend an oil change interval of 7,500 to 12,000 miles, or every 6
month. Technician B says oil change intervals are controlled electronically
through an oil life monitor on the dash. Who is right? - ✔✔Both A and B
4
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
