Dental Assistant questions2022

Question:1

Extra oral radiographs are used by the dentist to identify------------

Options:

a. Over hanging crowns or restorations

b. Both the mandible and maxilla at the same time

c. Caries in the anterior teeth

d. Decay between tooth surfaces

   Answer:

c. Caries in the anterior teeth

 

Question:2

Which of the following could result in a panoramic xray with a flat occlusal plane or smile line?

Options:

a. Chin tipped too low

b. Chin tipped too high

c. Chin held too far forward

d. Chin held too far back

   Answer:

b. Chin tipped too high

 

Question:3

Digital radiography uses less radiation than film based radiography because----------

Options:

a. Exposure time is increased

b. There is no developing time with digital

c. The sensor is larger than the film

d. The sensor is more sensitive than film

   Answer:

d. The sensor is more sensitive than film

 

Question:4

Insufficient time in the fixer solution will cause films to appear--------------------

Options:

a. Green

b. Brown

c. Clear

d. Black

   Answer:

b. Brown

 

Question:5

What causes reticulation?

Options:

a. The temperature change from developer to rinse

     water is too great

b. The chemicals are exhausted , causing the film

     to crack

c. The emulsion of the film is expired and has

     cracked

d. The developing solution is weak or cold.

   Answer:

a. The temperature change from developer to rinse

     water is too great

 

Question:6

A step wedge is used to------

Options:

a. Determine the film speed

b. Check the strength of the processing solution

c. Identify light leaks in the dark room

d. Evaluate safelight adequacy

   Answer:

b. Check the strength of the processing solution

Question:7

What is the purpose of the convex dot on intra oral film?

Options:

a. To identify where to hold the film

b. To determine film orientation

c. To identify anatomical landmarks

d. To mount radiographs in the correct order

   Answer:

b. To determine film orientation

 

Question:8

What type of cells are most easily destroyed or altered?

Options:

a. Bone cells

b. Brain cells

c. Blood forming cells

d. Nerve cells

   Answer:

c. Blood forming cells

 

Question:9

A collimator is used to----------

Options:

a. Reduce the size of the primary beam

b. Remove attenuated radiation

c. Minimize patient exposure time

d. Filter scatter radiation

   Answer:

a. Reduce the size of the primary beam

 

Question:10

What do the letters in ALARA mean?

Options:

a. As low as reasonably achievable

b. As low as reasonably available

c. As long as roentgens approved

d. As long as reasonably available

   Answer:

a. As low as reasonably achievable

 

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