ASE B5 Auto Damage Prep practice questions and answers 2026. Tap an option to test yourself — you'll see the correct answer and a plain-English explanation for every question. Free, no login.
Q1A vehicle's cooling system is overheating. Technician A says to check the radiator pressure cap for proper operation. Technician B says a stuck-closed thermostat could cause this condition. Who is correct?
✓ Correct answer: D. Both A and B
Both technicians are correct. A defective pressure cap that doesn't maintain proper system pressure can cause overheating. Similarly, a thermostat that's stuck closed will prevent coolant flow to the radiator, resulting in engine overheating.
Q2When installing a new water pump, what is the MOST important procedure to follow?
✓ Correct answer: C. Follow the manufacturer's torque specifications
The most important procedure when installing a water pump is to follow the manufacturer's torque specifications. This ensures proper sealing and prevents warping that could cause leaks or premature failure.
Q3After replacing a radiator in a vehicle, the technician should:
✓ Correct answer: B. Properly bleed the cooling system of air
After radiator replacement, proper system bleeding is essential to remove trapped air that could cause overheating, poor heater performance, and potential engine damage.
Q4During a cooling system inspection, a technician notices that the coolant is rusty brown in color. This condition MOST likely indicates:
✓ Correct answer: A. Corrosion in the cooling system
Rusty brown coolant typically indicates corrosion within the cooling system, which occurs when the corrosion inhibitors in the coolant have broken down or the wrong type of coolant was used.
Q5Which component prevents coolant flow through the radiator until the engine reaches operating temperature?
✓ Correct answer: D. Thermostat
The thermostat blocks coolant flow to the radiator when the engine is cold and opens to allow flow once operating temperature is reached, helping the engine warm up quickly and maintain proper operating temperature.
Q6Technician A says that the radiator pressure cap increases the boiling point of the coolant. Technician B says a faulty pressure cap can cause the coolant recovery system to overflow. Who is correct?
✓ Correct answer: C. Both A and B
Both technicians are correct. A pressure cap increases system pressure, which raises the coolant's boiling point. A faulty pressure cap that doesn't maintain proper pressure can cause the recovery system to overflow as the system can't properly contain the expanding coolant.
Q7When checking an electric cooling fan that isn't operating, what should be tested FIRST?
✓ Correct answer: B. Fuses and relays
Before replacing components, checking fuses and relays is the logical first step as these are common failure points and the easiest to test in an electric cooling fan circuit.
Q8After replacing a radiator hose, the technician should:
✓ Correct answer: A. Recheck clamp tightness after the initial warm-up cycle
After replacing a hose, rechecking clamp tightness after the initial warm-up is important because hoses often soften and compress when heated, which can lead to leaks if clamps aren't properly tightened.
Q9When bleeding air from a cooling system, the CORRECT procedure often involves:
✓ Correct answer: D. Opening the bleeder valve(s) while filling the system
Opening the bleeder valve(s) while filling the system allows trapped air to escape as the system fills with coolant, which is essential for proper cooling system function.
Q10A vehicle with a properly functioning cooling system should maintain an engine operating temperature of approximately:
✓ Correct answer: C. 195-220°F (90-105°C)
Modern engines typically operate in the 195-220°F (90-105°C) range. This temperature range provides optimal efficiency for combustion, emissions control, and engine durability.
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Theory