NDHCE Dental Radiography

Question 1

Which of the following X-ray techniques is used to detect interproximal caries and alveolar bone levels?

Accepted Answer

Bitewing radiograph

Answer

Periapical radiograph

Answer

Occlusal radiograph

Answer

Panoramic radiograph

Question 2

What is the recommended target distance (focal-film distance) for a standard periapical radiograph using paralleling technique?

Accepted Answer

16 inches

Answer

8 inches

Answer

12 inches

Answer

20 inches

Question 3

Which ionizing radiation unit measures the biological effect of radiation on human tissue?

Accepted Answer

Rem (Sievert)

Answer

Roentgen

Answer

Rad

Answer

Coulomb/kg

Question 4

A radiograph appears too light (underexposed). Which of the following is the most likely cause?

Accepted Answer

Insufficient exposure time

Answer

Excessive milliamperage

Answer

Increased kilovoltage

Answer

Processing in hot developer

Question 5

Which of the following best describes the SLOB (Same Lingual Opposite Buccal) rule used in dental radiography?

Accepted Answer

Used to locate the position of objects in the buccolingual dimension

Answer

Used to determine the correct vertical angulation

Answer

Used to calculate radiation dosage

Answer

Used to set kilovoltage for panoramic images

Question 6

Which type of radiograph provides the most comprehensive view of the entire dentition, jaws, and surrounding structures in a single image?

Accepted Answer

Panoramic radiograph

Answer

Full-mouth series

Answer

Bitewing series

Answer

Cephalometric radiograph