DHA Dental Assistant exam questions
Chairside assisting, instruments, materials, sterilisation and radiography.
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DHA Dental Assistant exam at a glance
- Exam code
- DAS5111
- Questions
- 150 MCQs
- Duration
- 3 hours
- Pass mark
- 60%
- Fee per attempt
- USD 240 (about AED 880)
- Result
- Pass or fail, no score
From the DHA CBT Guideline, Sep 2026. Delivered by Prometric; three attempts in total across the UAE authorities. Full DHA exam guide.
Try two questions from this bank
Original questions from the bank - pick an answer to see the rationale and reference.
In the Universal numbering system, which tooth is number 3?
Choose an answer to see the rationale.
Caries on the mesial surface of a maxillary lateral incisor, not involving the incisal angle, is which class in Black's classification?
Choose an answer to see the rationale.
Not sure where you stand? Sit 12 of these questions free, timed at real exam pace, and see which domains you are weakest in.
Take the free mock exam →Liked those? The full bank has 450 questions at this standard - every one with a rationale and a reference.
Get the full bank - AED 179What's inside
- ✓3 full-length papers (~150 Q each)
- ✓450 questions, no overlap between papers
- ✓Four options, one unambiguous best answer
- ✓A full rationale on every question
- ✓A real guideline or textbook reference
- ✓Every sub-topic in the published blueprint
The Dental Assistant exam in every GCC country
| Regulator | Exam | Format | Pass mark | Fee per attempt | Practise |
|---|---|---|---|---|---|
| DHA Dubai | Dental Assistant (DAS5111) | 150 MCQs in 3 hours | 60% | USD 240 (about AED 880) | DHA questions → |
| DOH Abu Dhabi, Al Ain and Al Dhafra | DOH licensing exam Regulator-wide format | Written + oral/OSCE | Pass / fail only | Not published | DOH questions → |
| MOHAP Northern Emirates - Ajman, Umm Al Quwain, Ras Al Khaimah and Fujairah | MOHAP licensing exam Regulator-wide format | Computer-based | Not published | Not published | MOHAP questions → |
| SHA Emirate of Sharjah | SHA licensing exam Regulator-wide format | Set at assessment | Not published | Not published | SHA questions → |
| SCFHS Kingdom of Saudi Arabia | SCFHS licensing exam Regulator-wide format | 200 MCQs, 240 min | 500-560 of 800 | Not published | SCFHS questions → |
| QCHP State of Qatar | Dental Assistant | 150 MCQs in 3 hours | 50% | Not published | QCHP questions → |
| NHRA Kingdom of Bahrain | NHRA licensing exam Regulator-wide format | Prometric CBT | Not published | Not published | NHRA questions → |
| OMSB Sultanate of Oman | OMSB licensing exam Regulator-wide format | Computer-based OC exam | Not published | Not published | OMSB questions → |
| Kuwait MOH State of Kuwait | Kuwait MOH licensing exam Regulator-wide format | 150 MCQs, 170 min | 60-70% | Not published | Kuwait MOH questions → |
exact exam published for Dental Assistant
From each regulator's own exam pages; anything a regulator does not publish says so. Assessment mode also depends on your licence title, so confirm your route on your eligibility notice.
Try 15 free Dental Assistant questions with answersDifferent from the samples on this page - each with a full explanationStart →What the Dental Assistant exam covers
The published blueprint for this exam breaks into 8 domains and 45 testable sub-topics. Our bank covers every one of them - here is the full map, so you can see exactly what you are expected to know.
Infection Control and Sterilisation~22%8 topics
- Hand hygiene and personal protective equipment: donning and doffing
- Spaulding classification of dental instruments
- Instrument reprocessing: cleaning, packaging, steam sterilisation
- Sterilisation monitoring: chemical, biological and Bowie-Dick tests
- Dental unit waterline quality
- Sharps safety and exposure incident management
- Surface disinfection and barriers in the operatory
- Clinical waste segregation
Chairside Assisting and Four-Handed Dentistry~15%6 topics
- Operator and assistant zones and clock positions
- Instrument transfer and the transfer zone
- Oral evacuation: HVE placement and saliva ejector
- Rubber dam isolation
- Matrix systems and the Tofflemire retainer
- Tray set-ups for common procedures
Dental Anatomy, Charting and Terminology~12%5 topics
- Universal, FDI and Palmer tooth numbering
- Primary and permanent dentition
- Tooth surfaces and Black's cavity classification
- Root morphology of permanent teeth
- Charting existing restorations and conditions
Dental Materials~12%5 topics
- Impression materials: alginate and elastomers
- Gypsum products and model pouring
- Cements and liners: glass ionomer, zinc oxide eugenol
- Composite resin, etching and light curing
- Amalgam handling and mercury hygiene
Dental Radiography and Radiation Safety~12%5 topics
- ALARA and radiation protection for patients and staff
- Intraoral views: bitewing, periapical, occlusal
- Paralleling and bisecting techniques
- Common technique errors: elongation, foreshortening, overlap
- Digital sensors, infection control and image storage
Medical Emergencies and Patient Care~10%5 topics
- Vital signs and medical history review
- Syncope and positioning
- Hypoglycemia in diabetic patients
- Anaphylaxis and the emergency drug kit
- Basic life support and AED use
Specialty Procedures~9%5 topics
- Endodontic assisting and irrigants
- Oral surgery assisting and post-extraction instructions
- Orthodontic assisting: separators, bands, brackets
- Periodontal and preventive procedures
- Fixed and removable prosthodontic assisting
Practice Management, Ethics and Occupational Safety~8%6 topics
- Patient confidentiality and records
- Informed consent and scope of practice
- Hazard communication and safety data sheets
- Mercury spill management
- Ergonomics and occupational health
- Appointment scheduling and recall systems
6 worked Dental Assistant practice questions
Original exam-style questions from the bank, spread across the blueprint domains. They are not real or recalled exam questions. Try each one, then open the answer for the rationale and reference. None of them appear in the free mock exam, so reading them will not spoil it.
Question 1 · Chairside Assisting and Four-Handed Dentistry
How should the high-volume evacuator tip be positioned during preparation of a posterior tooth?
- ABevel parallel to the tooth, slightly distal to it
- BBevel facing the occlusal surface, mesial to it
- CTip held against the soft palate
- DTip resting deep in the throat
Show answer and explanation
Correct answer: A. Bevel parallel to the tooth, slightly distal to it
The bevel is held parallel to the buccal or lingual surface, just distal to the tooth being prepared, to capture water spray and debris. Placing it on the soft palate or in the throat triggers the gag reflex.
Reference: Modern Dental Assisting, 14th ed.
Question 2 · Dental Anatomy, Charting and Terminology
In the FDI two-digit system, which tooth is 46?
- AMaxillary left first molar
- BMandibular right first molar
- CMandibular left second premolar
- DMaxillary right first molar
Show answer and explanation
Correct answer: B. Mandibular right first molar
The first digit 4 is the permanent mandibular right quadrant and the second digit 6 is the first molar. The maxillary right first molar is 16.
Reference: ISO 3950 Dentistry Designation System for Teeth
Question 3 · Dental Materials
What should be used to protect the eyes during light curing of composite?
- AClear safety glasses with no tint
- BAn orange blue-light filter shield
- CNo protection is needed
- DDark sunglasses
Show answer and explanation
Correct answer: B. An orange blue-light filter shield
Curing lights emit intense blue light that can damage the retina; an orange filter blocks these wavelengths. Clear glasses do not filter blue light.
Reference: Craig's Restorative Dental Materials, 14th ed.
Question 4 · Dental Radiography and Radiation Safety
If no protective barrier is available, where should the operator stand during an intraoral exposure?
- ADirectly behind the patient's head
- BNext to the tube to steady it
- CAt least 2 m away, 90-135° to the beam
- DIn line with the primary beam at 1 m
Show answer and explanation
Correct answer: C. At least 2 m away, 90-135° to the beam
Without a barrier, the operator stands at least 2 m (6 feet) away and at 90-135° to the primary beam, where scatter is lowest. Standing in line with the beam gives the highest exposure.
Reference: NCRP Report No. 177: Radiation Protection in Dentistry
Question 5 · Infection Control and Sterilisation
At the end of an aerosol-generating procedure, which sequence for removing PPE follows the usual recommended order?
- AMask, gown, gloves, eye protection
- BGown, mask, eye protection, gloves
- CGloves, eye protection, gown, mask
- DEye protection, mask, gloves, gown
Show answer and explanation
Correct answer: C. Gloves, eye protection, gown, mask
Gloves, the most contaminated item, are removed first, followed by eye protection, gown and finally the mask, with hand hygiene after. Removing the mask before gloves risks touching the face with contaminated hands.
Reference: CDC Sequence for Putting On and Removing PPE
Question 6 · Infection Control and Sterilisation
What does a daily Bowie-Dick test check in a pre-vacuum steam sterilizer?
- AEffective air removal and steam penetration
- BKilling of highly resistant bacterial spores
- CCorrect temperature in each package
- DDryness of packs at the end of cycle
Show answer and explanation
Correct answer: A. Effective air removal and steam penetration
The Bowie-Dick test detects air leaks and inadequate air removal in pre-vacuum sterilizers, run daily in an empty chamber. Spore kill is assessed with biological indicators, not the Bowie-Dick test.
Reference: ISO 11140
Last reviewed September 2026
About these questions: every question is original, written to the published blueprint, with a rationale and a reference. No recalled or leaked exam content is used. How we write our questions.
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