DANB Radiation Health & Safety

Question 1

What is the main purpose of using a lead apron during dental x-rays?

Accepted Answer

To reduce scatter radiation exposure

Answer

To keep the patient warm

Answer

To aid in positioning

Answer

To stabilize the film holder

Question 2

Which tissue is most sensitive to radiation exposure?

Accepted Answer

Reproductive cells

Answer

Muscle tissue

Answer

Nerve cells

Answer

Cartilage

Question 3

How should dental x-ray films be stored to maintain quality?

Accepted Answer

In a cool, dry area away from radiation

Answer

In direct sunlight

Answer

Next to sterilizers

Answer

On the operatory counter

Question 4

Which of the following helps reduce patient radiation exposure?

Accepted Answer

Using a rectangular collimator

Answer

Using longer exposure times

Answer

Using a round collimator

Answer

Using a low-speed film

Question 5

When is it safe for the dental assistant to remain in the room during an x-ray?

Accepted Answer

Only when standing behind a lead barrier

Answer

If wearing gloves

Answer

If using a digital sensor

Answer

During panoramic imaging

Question 6

What is the ideal distance for the operator to stand from the x-ray tube head during exposure?

Accepted Answer

6 feet away at 90-135 degrees to the beam

Answer

2 feet directly behind the tube

Answer

3 feet in front of the beam

Answer

Standing directly beside the patient