HESI RADIOLOGY EXIT EXAM PREP VERSION 3 |
EXAM & PRACTICE EXAM 2026/2027 | ACTUAL
CORRECT QUESTIONS AND VERIFIED DETAILED
ANSWERS | ALREADY GRADED A+ | BRAND NEW
VERSION
1. The film mount must be labeled with information once the radiographs have
been processed. In addition to the patient name, what other information is
considered essential for the film mount?
• Answer: Date of exposures
Rationale: Proper identification of radiographs requires patient name, date
of exposure, and often the name of the facility or dentist. The date ensures
chronological tracking and legal documentation.
2. What radiographic characteristic is affected when the PID (position-indicating
device) is changed from 16-18 inches?
• Answer: Less divergence beam
Rationale: Increasing the PID length reduces beam divergence, resulting in
less magnification and improved image sharpness. A longer PID also
reduces patient radiation exposure by decreasing the air gap.
3. Where should the thermometer be kept for manual processing procedures?
• Answer: Developer solution
Rationale: In manual film processing, the developer temperature must be
monitored closely because it directly affects the developing time and image
quality. The thermometer is placed in the developer solution.
4. The patient states that movement occurred during x-ray exposure. Which error
will result on the image?
, • Answer: Decreased sharpness
Rationale: Patient movement during exposure causes blurring (unsharpness)
of the image. The radiographic image will appear fuzzy, with loss of detail
and double contours.
5. Which describes a radiograph exposed with too much vertical angulation?
• Answer: Foreshortened
Rationale: Excessive vertical angulation (too steep) causes the image of the
tooth to appear shorter than its actual length (foreshortening). Insufficient
angulation causes elongation.
6. What is the primary purpose of using a lead apron during dental radiography?
• Answer: Reduce radiation exposure to the thyroid and reproductive
organs
Rationale: Lead aprons shield radiosensitive organs from scatter radiation.
Thyroid collars are also used to protect the thyroid gland.
7. Which type of intraoral radiographic examination is used to evaluate the entire
dentition and supporting bone?
• Answer: Full mouth series (FMS) or complete series
Rationale: A full mouth series consists of periapical and bitewing images
that cover all tooth-bearing areas.
8. What is the correct placement of the film packet for a periapical radiograph of
the maxillary central incisors?
• Answer: Vertically with the white side facing the tooth
Rationale: For anterior teeth, the film is placed vertically. The white side
(tube side) faces the x-ray source.
, 9. Which radiographic technique is used to image the entire mandible in one
exposure?
• Answer: Panoramic radiography
Rationale: Panoramic imaging provides a broad view of the mandible,
maxilla, sinuses, and temporomandibular joints on a single film.
10. What is the maximum permissible dose (MPD) for a radiation worker per year?
• Answer: 50 mSv (5 rem)
Rationale: Occupational dose limit for whole-body exposure is 50 mSv per
year, with a cumulative limit of 10 mSv × age.
11. Which term describes the degree of darkness on a radiograph?
• Answer: Density
Rationale: Density refers to the overall blackness of the image. It is
controlled by milliamperage (mA) and exposure time.
12. A radiograph with low contrast appears:
• Answer: Gray and flat
Rationale: Low contrast (long-scale contrast) shows many shades of gray,
making it difficult to distinguish between similar densities.
13. Which technique reduces the amount of radiation exposure to the patient by
limiting the x-ray beam size?
• Answer: Collimation
Rationale: Collimation restricts the beam to the area of interest, reducing
patient dose and scatter radiation.
14. What is the recommended total filtration for dental x-ray machines operating
above 70 kVp?
EXAM & PRACTICE EXAM 2026/2027 | ACTUAL
CORRECT QUESTIONS AND VERIFIED DETAILED
ANSWERS | ALREADY GRADED A+ | BRAND NEW
VERSION
1. The film mount must be labeled with information once the radiographs have
been processed. In addition to the patient name, what other information is
considered essential for the film mount?
• Answer: Date of exposures
Rationale: Proper identification of radiographs requires patient name, date
of exposure, and often the name of the facility or dentist. The date ensures
chronological tracking and legal documentation.
2. What radiographic characteristic is affected when the PID (position-indicating
device) is changed from 16-18 inches?
• Answer: Less divergence beam
Rationale: Increasing the PID length reduces beam divergence, resulting in
less magnification and improved image sharpness. A longer PID also
reduces patient radiation exposure by decreasing the air gap.
3. Where should the thermometer be kept for manual processing procedures?
• Answer: Developer solution
Rationale: In manual film processing, the developer temperature must be
monitored closely because it directly affects the developing time and image
quality. The thermometer is placed in the developer solution.
4. The patient states that movement occurred during x-ray exposure. Which error
will result on the image?
, • Answer: Decreased sharpness
Rationale: Patient movement during exposure causes blurring (unsharpness)
of the image. The radiographic image will appear fuzzy, with loss of detail
and double contours.
5. Which describes a radiograph exposed with too much vertical angulation?
• Answer: Foreshortened
Rationale: Excessive vertical angulation (too steep) causes the image of the
tooth to appear shorter than its actual length (foreshortening). Insufficient
angulation causes elongation.
6. What is the primary purpose of using a lead apron during dental radiography?
• Answer: Reduce radiation exposure to the thyroid and reproductive
organs
Rationale: Lead aprons shield radiosensitive organs from scatter radiation.
Thyroid collars are also used to protect the thyroid gland.
7. Which type of intraoral radiographic examination is used to evaluate the entire
dentition and supporting bone?
• Answer: Full mouth series (FMS) or complete series
Rationale: A full mouth series consists of periapical and bitewing images
that cover all tooth-bearing areas.
8. What is the correct placement of the film packet for a periapical radiograph of
the maxillary central incisors?
• Answer: Vertically with the white side facing the tooth
Rationale: For anterior teeth, the film is placed vertically. The white side
(tube side) faces the x-ray source.
, 9. Which radiographic technique is used to image the entire mandible in one
exposure?
• Answer: Panoramic radiography
Rationale: Panoramic imaging provides a broad view of the mandible,
maxilla, sinuses, and temporomandibular joints on a single film.
10. What is the maximum permissible dose (MPD) for a radiation worker per year?
• Answer: 50 mSv (5 rem)
Rationale: Occupational dose limit for whole-body exposure is 50 mSv per
year, with a cumulative limit of 10 mSv × age.
11. Which term describes the degree of darkness on a radiograph?
• Answer: Density
Rationale: Density refers to the overall blackness of the image. It is
controlled by milliamperage (mA) and exposure time.
12. A radiograph with low contrast appears:
• Answer: Gray and flat
Rationale: Low contrast (long-scale contrast) shows many shades of gray,
making it difficult to distinguish between similar densities.
13. Which technique reduces the amount of radiation exposure to the patient by
limiting the x-ray beam size?
• Answer: Collimation
Rationale: Collimation restricts the beam to the area of interest, reducing
patient dose and scatter radiation.
14. What is the recommended total filtration for dental x-ray machines operating
above 70 kVp?
