100+ Free Ireland Truck & Bus Theory Test Practice Questions

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Question 1

Score: 0/0

Why should a driver drain air tanks or follow the manufacturer's air-system moisture procedure where applicable?

It makes the tachograph record rest automatically

It increases passenger capacity

It reduces the need for mirrors

Moisture can impair air-brake performance, especially in cold conditions

to track

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2026 Statistics

Key Facts: Ireland Truck & Bus Theory Test Exam

Official TheoryTest.ie category for Bus & Truck Theory Test

TheoryTest.ie FAQ

140

Official combined C/D question count

TheoryTest.ie FAQ and RSA truck/bus theory test page

180 minutes

Official combined C/D time limit

TheoryTest.ie FAQ

104/140

Official combined C/D pass mark

TheoryTest.ie FAQ and RSA truck/bus theory test page

EUR84

RSA-published combined C/D theory-test fee

RSA truck/bus theory test page

2 years

Theory-test certificate validity

RSA truck/bus theory test page and TheoryTest.ie FAQ

The Ireland CD Bus & Truck Driver Theory Test is a distinct combined category C and D test with 140 questions, 180 minutes, a 104/140 pass mark and a EUR84 fee. Passing it allows application for both bus and truck learner permits within the two-year certificate validity period.

Sample Ireland Truck & Bus Theory Test Practice Questions

Try these sample questions to test your Ireland Truck & Bus Theory Test exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which official Driver Theory Test category is used for the combined Ireland truck and bus theory test?

A.C

B.D

C.CD

D.BW

Explanation: TheoryTest.ie lists CD as the Bus & Truck Theory Test category. C is truck only, D is bus only, and BW is for cars, work vehicles and land tractors.

2How many multiple-choice questions are on the official combined category C and D theory test?

A.74

B.100

C.104

D.140

Explanation: RSA states that the combined category C and D theory test has 140 multiple-choice questions. The standalone C or D tests have 100 questions.

3What is the official pass mark for the combined C and D theory test?

A.74 correct out of 100

B.80 correct out of 100

C.104 correct out of 140

D.120 correct out of 140

Explanation: RSA publishes a pass mark of 104 correct answers out of 140 for the combined category C and D test. The 74/100 mark applies to the standalone truck or bus test.

4What time limit is published for the official combined C and D Driver Theory Test?

A.60 minutes

B.90 minutes

C.120 minutes

D.180 minutes

Explanation: TheoryTest.ie lists 180 minutes for the CD Bus & Truck Theory Test. The standalone C and D tests use a shorter 120-minute format.

5What fee does RSA publish for the combined bus and truck theory test?

A.EUR45

B.EUR72

C.EUR84

D.EUR120

Explanation: RSA publishes a EUR84 fee for the combined category C and D theory test. The EUR72 fee applies to either standalone category C truck or category D bus.

6According to RSA, what does passing the combined bus and truck theory test allow you to apply for?

A.Only a truck learner permit

B.Only a bus learner permit

C.Both bus and truck learner permits, if other requirements are met

D.A Driver CPC card without any further tests

Explanation: RSA states that successfully passing the combined bus and truck theory test allows you to apply for a bus and truck learner permit. It does not by itself issue a Driver CPC card.

7How long is a passed truck, bus, or combined bus and truck theory-test certificate valid for learner-permit application?

A.6 months

B.1 year

C.Up to 2 years

D.5 years

Explanation: RSA states that the truck, bus or combined bus and truck theory-test certificate is valid for up to two years. If it is not exchanged for a learner permit within that time, the test must be taken again.

8What language availability does TheoryTest.ie publish for the new combined C and D Theory Test?

A.Irish only

B.English only until further notice

C.English or Irish at every centre

D.Any EU language on request

Explanation: TheoryTest.ie states that the new combined C and D Theory Test is provided in English only until further notice. That differs from A, B, C and D category names that may be displayed in Irish during scheduling.

9Why is the CD test not simply a duplicate of the standalone truck or bus test?

A.It is shorter than both standalone tests

B.It covers a wider range of topics and has more questions

C.It is a practical driving test

D.It tests only Driver CPC case studies

Explanation: RSA says the combined truck and bus test covers a wider range of topics than the truck or bus theory tests alone. It also asks 140 questions rather than the 100 used for standalone C or D.

10Which website is the official RSA Driver Theory Test booking site?

A.TheoryTest.ie

B.NCT.ie

C.Motortax.ie

D.A private search-result booking broker

Explanation: TheoryTest.ie is the official RSA Driver Theory Test site operated through Prometric. RSA warns candidates to use the official theory-test site and beware of unofficial booking websites.

About the Ireland Truck & Bus Theory Test Exam

Prepare for Ireland's combined CD Bus & Truck Driver Theory Test with original practice questions grounded in RSA, TheoryTest.ie, NDLS, Rules of the Road, load security, passenger safety, Driver CPC and tachograph guidance.

Assessment

Computer-based combined category C and D Driver Theory Test. TheoryTest.ie lists CD as the Bus & Truck Theory Test and publishes 180 minutes, 140 questions and a 104-question pass mark. RSA states the combined C and D test covers a wider range of topics than the truck or bus tests alone.

Time Limit

180 minutes

Passing Score

104 correct out of 140

Exam Fee

EUR84 for the combined category C and D Driver Theory Test, per RSA page reviewed on 2026-05-30. (Road Safety Authority (RSA); Driver Theory Test service operated by Prometric Ireland Ltd. through TheoryTest.ie)

Ireland Truck & Bus Theory Test Exam Content Outline

12%

Combined CD Test Logistics

CD category identity, booking, fee, 140-question format, 180-minute time limit, 104-question pass mark, English-only current availability, retests and two-year certificate validity.

14%

Licence Categories and Learner Permits

C, C1, CE, C1E, D, D1, DE and D1E, MAM, passenger limits, trailer thresholds, minimum ages, category B prerequisite, residency and learner restrictions.

16%

Rules, Signs, Markings and Priority

Rules of the Road, traffic signs, road markings, bus lanes, yellow boxes, roundabouts, junction priority, tunnels, motorways and emergency vehicles.

18%

Truck Loads, Dimensions and Roadworthiness

Pre-use checks, brakes, tyres, mirrors, load restraint, load distribution, axle and design limits, abnormal loads, overhangs, dimensions and stability.

16%

Bus Passenger Safety and Roadworthiness

Passenger care, doors, seat belts, schoolchildren, luggage, wheelchairs, standing passengers, emergency exits, low bridges, swept path and defect reporting.

14%

Tachographs, Driver Hours and CPC

Driver cards, tachograph records, downloads, 4.5-hour break rule, daily and weekly driving limits, CPC initial qualification, case study tests and periodic training.

10%

Hazards, Blind Spots and Emergencies

Vulnerable road users, blind spots, left turns, reversing, adverse weather, fatigue, breakdowns, bridge strikes, fires and collision response.

How to Pass the Ireland Truck & Bus Theory Test Exam

What You Need to Know

Passing score: 104 correct out of 140
Assessment: Computer-based combined category C and D Driver Theory Test. TheoryTest.ie lists CD as the Bus & Truck Theory Test and publishes 180 minutes, 140 questions and a 104-question pass mark. RSA states the combined C and D test covers a wider range of topics than the truck or bus tests alone.
Time limit: 180 minutes
Exam fee: EUR84 for the combined category C and D Driver Theory Test, per RSA page reviewed on 2026-05-30.

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

Ireland Truck & Bus Theory Test Study Tips from Top Performers

1Memorise the CD logistics first: 140 questions, 180 minutes, 104 correct to pass, EUR84 fee and two-year certificate validity.

2Study C/C1/CE/C1E and D/D1/DE/D1E category rules together so trailer, MAM and passenger thresholds do not blur.

3Treat truck load security and bus passenger safety as separate high-risk areas; the combined test is wider than either standalone test.

4Keep Driver CPC separate from the Driver Theory Test: the theory test overlaps with CPC knowledge but does not by itself issue a CPC card.

5Use the RSA Rules of the Road for priority, signs and markings, then add official truck/bus materials for professional-driver scenarios.

Frequently Asked Questions

Is ie-dtt-truck-bus a valid Ireland Driver Theory Test target?

Yes. TheoryTest.ie lists CD as the Bus & Truck Theory Test, separate from C Truck and D Bus. RSA says candidates who want both truck and bus licences can take the combined bus and truck theory test.

How is the combined CD test different from the standalone C or D test?

TheoryTest.ie publishes 180 minutes, 140 questions and a 104-question pass mark for CD, compared with 120 minutes, 100 questions and 74 correct for C or D. RSA says the combined C and D test covers a wider range of topics.

How much does the Ireland combined truck and bus theory test cost?

RSA publishes a EUR84 fee for the combined category C and D theory test. The standalone C or D test fee is EUR72.

Is the combined C and D test available in Irish?

TheoryTest.ie states that A, B, C and D theory tests are provided in Irish, but the new combined C and D Theory Test is provided in English only until further notice.

What does passing the combined CD test allow?

RSA states that successfully passing the combined bus and truck theory test allows you to apply for a bus and truck learner permit, provided the certificate is used within its two-year validity period and other NDLS requirements are met.

Does passing the combined CD test complete Driver CPC?

No. RSA says the truck and bus theory tests for CPC are the same as the regular truck and bus theory test, but professional drivers must also complete the CPC process, including case study and practical elements unless an acquired-rights or exemption route applies.