MCQs in GENERAL PROPERTIES OF X-RAY PRODUCTION AND DOSE

GENERAL PROPERTIES OF X-RAY PRODUCTION AND DOSE _ Dental MCQs
(Oral Radiology MCQs _ Dental MCQs)

1. A film badge is a type of
A. Identification plate
B. Sonometer
C. Dosimeter
D. Tachometer

2. Magnification can be reduced in X-ray by
A. Long cone
B. Short cone
C. Place film far from object and parallel
D. Reduce exposure time

3. The best radiographic view of lateral condyle is
A. Towne’s view
B. Reverse Towne’s view
C. Water’s view
D. Caldwell view

4. Most common cause of break in canal seen on IOPA radiograph is
A. Calcification of canal
B. Merging of canal
C. Bifurcation of canal
D. Extra canal

5. Proximal caries best detected by
A. Bitewing
B. Occlusal
C. IOPA
D. Panoramic

6. The size and shape of the X-ray beam is restricted by
A. Filter
B. Collimator
C. Film badge
D. E speed film

7. Use of F speed films reduces patient exposure by
A. 50% compared to E speed films
B. 75% compared to E speed films
C. 25% compared to E speed films
D. No reduction in exposure

8. The primary source of X-ray photons
A. Bremsstrahlung radiation
B. Characteristic radiation
C. Coherent scattering
D. Compton scattering

9. Which of the following is used to estimate risk in human organs?
A. Effective dose
B. Exposure
C. Absorbed dose
D. Equivalent dose

10. Radiographic technique to detect monitor salivary gland disease is called
A. Angiography
B. Computed tomography
C. Electrocardiogram
D. Sialography

11. Radiation caries is characteristically seen in
A. Occlusal fissures
B. Proximal surface
C. Incisal edges
D. Cervical third

12. The best radiograph for viewing of maxillary sinus is
A. Lateral oblique maxilla
B. Submentovertex
C. Water’s view
D. Lateral skull

13. The standard size of adult IOPA film is
A. 22 × 30 mm
B. 31 × 41 mm
C. 31 × 40 mm
D. 22 × 40 mm

14. The zygomatic arches are best visualized on the
A. Submentovertex view
B. Water’s view
C. Reverse Towne’s view
D. PA view

15. Least radiosensitive cells are
A. WBC, bone, cells, cartilage
B. Muscle cell, nerve cell, bone cell
C. Connective tissue cell, endothelial cell, muscle cell
D. RBC, muscle cell, bone cell

16. Halo effect around root is seen in
A. Widened PDL
B. Horizontal root fracture
C. Periapical periostitis
D. Acute periapical abscess

17. A 30-year-old patient having chronic pain of long duration with radiographic appearance of endosteal bone formation. Diagnosis is
A. Acute osteomyelitis
B. Ewing’s sarcoma
C. Garre’s osteomyelitis
D. Chronic focal sclerosing osteomyelitis

18. Recommended dose of prednisolone for the treatment of desquamative gingivitis is
A. Daily dose of 40–50 mg reduced to daily maintenance dose of 5–10 mg
B. Daily dose of 30–40 mg reduced to daily maintenance dose of 10–20 mg
C. Daily dose of 30–40 mg reduced to daily maintenance dose of 5–10 mg
D. Daily dose of 50–60 mg reduced to daily maintenance dose of 10–20 mg

19. Medical linear accelerators produce
A. Neutrons + Electrons
B. Protons + Neutrons
C. Photons + Protons
D. Photons + Electrons

20. Filter used in biologically safety cabinet is
A. High-efficiency particulate filter (HEPA)
B. Berkfield
C. Millipore
D. Seitz filter

21. Unit to measure radiation in radiotherapy is
A. Gray
B. Sievert
C. Celsius
D. Radons

22. Effective dose of X-ray exposure for an adult in an IOPA
A. 200 μSv
B. 5,000 μSv
C. 26 μSv
D. 5 μSv

23. Which of the following is true about radiation?
A. More rapidly dividing cells are less susceptible
B. Effects of X-rays are temporary and reversible
C. X-rays do not damage all kinds of biologic forms
D. Only primary central beam is potentially hazardous

24. Digital radiography requires less radiation than conventional radiography because
A. The sensor is larger
B. The sensor is more sensitive to X-rays
C. The exposure time is increased
D. The pixels sense transmitted light quickly

25. Diagnosis of incipient carious lesion is best done by
A. D speed film
B. C speed film
C. E speed film
D. B speed film

26. Diameter and length of filament in X-ray tube, respectively, are
A. 2 mm and 1 cm
B. 3 mm and 2 cm
C. 4 mm and 1 cm
D. 1 cm and 2 mm

27. Pantomograph–chin placed in front of focal trough; the effect on image will be
A. Blurred and magnified horizontally
B. Blurred and magnified vertically
C. Clear and magnified
D. Blurred and diminished

28. Osteogenic sarcoma, radiographic appearance
A. Sunburst appearance
B. Snow driven appearance
C. Onion skin appearance
D. Cotton wool appearance

29. Multilocular radiolucency of cyst is associated with
A. OKC
B. Ameloblastoma
C. Dentigerous cyst
D. Periapical cyst

30. Ground glass appearance of bone in the radiograph is suggestive of
A. Hyperparathyroidism
B. Fibrous dysplasia
C. Condensing osteitis
D. Osteopetrosis

31. Too light, thin faded image on radiographic film is due to
A. Overdevelopment
B. Underdevelopment
C. Exhausted developer solution
D. Pre-exposure of radiograph

32. The metallic lead back in a film packet helps in which of the following?
A. To absorb secondary radiation
B. To reduce the exposure time
C. To reduce the developing time
D. All of the above

33. Hardener used in fixing solutions is
A. Sodium thiosulfate
B. Alkaline potassium sulfate
C. Potassium bromide
D. Sodium sulfide

34. The following kVp setting produces greatest contrast in radiographic images
A. 70 kVp
B. 80 kVp
C. 90 kVp
D. 100 kVp