DGT Theory Test (Examen Teórico DGT) — Questions and Answers

Question 1: What does PPE stand for in the context of Directorate-General for Traffic Test safety protocols?

Project Planning Essentials
Professional Performance Evaluation
Public Policy Enforcement
Personal Protective Equipment (Correct answer)

Correct answer: Personal Protective Equipment

PPE stands for Personal Protective Equipment, which includes items worn to minimize exposure to hazards that cause injuries.

Question 2: After driving through a deep puddle, what should you do to restore normal braking?

Pump the brakes hard immediately to test full stopping power
Pull over and wait 10 minutes for brakes to dry naturally
Increase speed briefly to evaporate water from the rotors
Apply light brake pressure gently several times to generate heat and dry the pads (Correct answer)

Correct answer: Apply light brake pressure gently several times to generate heat and dry the pads

Lightly and repeatedly applying the brakes generates friction heat that dries the brake pads and rotors.

Question 3: A driver's reaction distance at 50 mph is approximately how many feet assuming a 1.5-second reaction time?

75 feet
55 feet
110 feet (Correct answer)
150 feet

Correct answer: 110 feet

At 50 mph (73 ft/sec), a 1.5-second reaction time means the vehicle travels roughly 110 feet before braking begins.

Question 4: A driver with a BAC of 0.08% is stopped by police. Under implied consent law, what happens if the driver refuses a breathalyzer test?

The driver's license is automatically suspended and refusal may be used as evidence (Correct answer)
The driver cannot be charged with DUI
The officer must obtain a warrant before any penalty applies
The driver is only fined but keeps their license

Correct answer: The driver's license is automatically suspended and refusal may be used as evidence

Refusing a chemical test under implied consent typically results in automatic license suspension and the refusal itself can be presented as evidence of guilt in court.

Question 5: Which of the following best describes 'speed matching' on a highway merge?

Stopping at the end of the on-ramp
Accelerating to match freeway traffic speed before merging (Correct answer)
Slowing to let all highway vehicles pass first
Using the shoulder to gain extra merging distance

Correct answer: Accelerating to match freeway traffic speed before merging

Speed matching means reaching the same speed as highway traffic before merging to avoid dangerous speed differentials.

Question 6: A driver is turning left at a green light. Who must they yield to?

Oncoming traffic and pedestrians crossing the intersection (Correct answer)
Emergency vehicles only
No one; they have a green light
Vehicles turning right on red only

Correct answer: Oncoming traffic and pedestrians crossing the intersection

A left-turning driver must always yield to oncoming traffic and pedestrians even on a green light because they are crossing opposing lanes.

Question 7: What is the main purpose of a speed limit sign?

To regulate traffic flow and improve road safety. (Correct answer)
To warn drivers about upcoming sharp turns.
To allow drivers to determine their own safe speed.
To prevent vehicles from overtaking.

Correct answer: To regulate traffic flow and improve road safety.

Speed limits are designed to reduce accidents by ensuring vehicles travel at safe speeds for road conditions.

Question 8: When a Directorate-General for Traffic Test professional discovers a regulatory violation, what is the appropriate action?

Report it through proper channels immediately (Correct answer)
Discuss it informally only
Wait to see if it happens again
Cover it up to avoid trouble

Correct answer: Report it through proper channels immediately

Regulatory violations must be reported through proper channels to prevent harm and maintain compliance with established standards.

Question 9: What is the purpose of rumble strips on highway shoulders?

Indicate the speed limit zone
Mark bicycle lane boundaries
Alert drowsy or distracted drivers they are leaving the travel lane (Correct answer)
Provide traction for stopping vehicles

Correct answer: Alert drowsy or distracted drivers they are leaving the travel lane

Rumble strips create noise and vibration that alert drivers when their vehicle drifts onto the shoulder.

Question 10: What is the purpose of a Safety Data Sheet (SDS) in Directorate-General for Traffic Test operations?

To track employee schedules
To record financial data
To list company policies
To provide hazard information about chemicals and materials (Correct answer)

Correct answer: To provide hazard information about chemicals and materials

Safety Data Sheets provide detailed information about chemical hazards, safe handling procedures, and emergency measures.

Question 11: What is the zero-tolerance BAC limit for drivers under 21 years of age in most U.S. states?

0.04%
0.02% or lower (Correct answer)
0.08%
0.00% strictly

Correct answer: 0.02% or lower

Most states set zero-tolerance BAC limits at 0.02% or lower for drivers under 21, effectively prohibiting any measurable alcohol consumption before driving.

Question 12: What should a driver do when approaching an intersection and the traffic light changes from green to yellow?

Yield to oncoming traffic and proceed
Accelerate to clear the intersection before it turns red
Stop if it is safe to do so before the stop line (Correct answer)
Activate hazard lights and proceed slowly

Correct answer: Stop if it is safe to do so before the stop line

A yellow light signals that the light is about to turn red; drivers should stop if they can do so safely before the stop line.

Question 13: What is an ignition interlock device (IID) and when is it commonly required?

A GPS tracker installed after a speeding ticket
An alarm system installed after vehicle theft
A breath-test device wired to the ignition that prevents the car from starting if alcohol is detected (Correct answer)
A data recorder used by insurance companies

Correct answer: A breath-test device wired to the ignition that prevents the car from starting if alcohol is detected

An IID requires the driver to provide a breath sample before the engine will start, and is commonly required after a DUI conviction to allow restricted driving privileges.

Question 14: When two vehicles meet on a narrow mountain road where neither can pass, which vehicle has the right-of-way?

The larger vehicle
The vehicle traveling downhill
The vehicle traveling uphill (Correct answer)
The vehicle that arrived on the road first

Correct answer: The vehicle traveling uphill

The vehicle traveling uphill generally has the right-of-way because it is more difficult to reverse downhill and maintain vehicle control.

Question 15: What is the purpose of a 'variable speed limit' sign on a highway?

To show the minimum speed required on the road
To display an electronically adjusted speed limit based on real-time traffic or weather conditions (Correct answer)
To set permanent maximum speeds based on road design
To indicate school zone hours

Correct answer: To display an electronically adjusted speed limit based on real-time traffic or weather conditions

Variable speed limit signs use real-time data to display appropriate speeds that improve safety and traffic flow in changing conditions.

Question 16: What does a 'speed advisory sign' (yellow diamond) indicate compared to a regulatory speed limit sign?

It recommends a safe speed for a curve or hazard but is not legally binding (Correct answer)
It applies only to trucks and buses
It overrides any posted speed limit in the area
It is legally enforceable just like a speed limit

Correct answer: It recommends a safe speed for a curve or hazard but is not legally binding

Advisory speed signs (yellow) suggest a safe speed for conditions like curves but carry no legal penalty, unlike regulatory white signs.

Question 17: When following a large truck on a highway, why is it important to maintain extra following distance beyond the standard rule?

Trucks accelerate faster than cars
Trucks have shorter stopping distances than cars
Trucks create wind turbulence that can destabilize smaller vehicles, and their size limits your forward visibility (Correct answer)
Trucks are required by law to drive slower than cars

Correct answer: Trucks create wind turbulence that can destabilize smaller vehicles, and their size limits your forward visibility

Large trucks create aerodynamic turbulence and block sightlines, requiring extra following distance for safety and visibility.

Question 18: What is the purpose of a 'yield' sign at a merge or intersection?

Drivers should honk to alert cross traffic of their presence
Drivers must stop completely before proceeding
Drivers have the full right-of-way and other traffic must stop
Drivers must slow down and give the right-of-way to conflicting traffic, stopping only if necessary (Correct answer)

Correct answer: Drivers must slow down and give the right-of-way to conflicting traffic, stopping only if necessary

A yield sign means slow and be prepared to stop, but you need only stop if there is conflicting traffic — unlike a stop sign which always requires a full stop.

Question 19: What does 'engine knocking' typically indicate?

A loose heat shield on the exhaust
The oil is too thick for current conditions
The engine needs a tune-up
Pre-ignition or detonation, often from low-octane fuel or carbon buildup (Correct answer)

Correct answer: Pre-ignition or detonation, often from low-octane fuel or carbon buildup

Engine knocking is caused by pre-ignition or detonation — the fuel-air mixture igniting too early or unevenly — often due to low-octane fuel or carbon deposits.

Question 20: Which skill is most important for success in Environmental Awareness & Conservation within Directorate-General for Traffic Test?

Working without any training
Avoiding feedback
Continuous learning and adaptation (Correct answer)
Resisting change

Correct answer: Continuous learning and adaptation

Continuous learning ensures professionals stay current with evolving practices in Environmental Awareness & Conservation.

Question 21: What is the effect of carbon monoxide (CO) on a driver?

It causes temporary vision impairment only
It increases alertness and reaction time
It only affects passengers, not the driver
It causes drowsiness, confusion, and can be fatal (Correct answer)

Correct answer: It causes drowsiness, confusion, and can be fatal

Carbon monoxide reduces oxygen delivery to the brain, causing drowsiness, impaired judgment, and potentially death.

Question 22: What should a driver do immediately after a tire blowout at highway speed?

Grip the wheel firmly, ease off the gas, and steer straight (Correct answer)
Brake hard immediately
Swerve to the shoulder immediately
Turn off the ignition

Correct answer: Grip the wheel firmly, ease off the gas, and steer straight

Firm steering and gradual deceleration prevent the vehicle from spinning or overturning after a sudden blowout.

Question 23: What does a 'green card' serve as in the context of vehicle insurance?

Proof of vehicle ownership abroad
A discount card for fuel at international borders
International certificate of motor insurance valid across member countries (Correct answer)
Documentation for temporary vehicle import

Correct answer: International certificate of motor insurance valid across member countries

A green card is the internationally recognized certificate of motor insurance, accepted as proof of minimum coverage in participating countries.

Question 24: What is the function of the vehicle's serpentine belt?

Controls the timing of engine valves
Connects the engine to the transmission
Drives multiple accessories like the alternator, power steering pump, and AC compressor (Correct answer)
Regulates fuel injection timing

Correct answer: Drives multiple accessories like the alternator, power steering pump, and AC compressor

The serpentine belt drives multiple engine accessories simultaneously, including the alternator, power steering pump, and air conditioning compressor.

Question 25: What is the purpose of a Safety Data Sheet (SDS) in Directorate-General for Traffic Test operations?

To record financial data
To track employee schedules
To provide hazard information about chemicals and materials (Correct answer)
To list company policies

Correct answer: To provide hazard information about chemicals and materials

Safety Data Sheets provide detailed information about chemical hazards, safe handling procedures, and emergency measures.

DGT Theory Test (Examen Teórico DGT)

The official Spanish driving theory test administered by the Directorate-General for Traffic (DGT), required to obtain a Category B driving licence in Spain. Candidates must answer 30 multiple-choice questions covering traffic law, road signs, speed limits, priority rules, and safe driving behaviour.

Questions

25 min

Time Limit

90%

To Pass

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Exam Rules

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Unanswered questions count as wrong — answer everything
10 pretest questions are mixed in and don't affect your score
Timer auto-submits when time runs out
Your progress is auto-saved every 30 seconds

These practice questions were written with AI tools. They are not real exam questions. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

dgt.es — Test delivery, score release, exam format · verified Oct 2026
sede.dgt.gob.es — Eligibility · verified Oct 2026