X-Ray Certification Equipment Operation and Maintenance 2

Question 1

Which component in an X-ray tube is responsible for focusing the electron beam onto the focal spot?

Accepted Answer

Focusing cup

Answer

Rotating anode

Answer

Glass envelope

Answer

Stator

Question 2

What is the primary purpose of the heel effect in X-ray imaging?

Accepted Answer

It creates a variation in beam intensity across the field, with less intensity on the anode side

Answer

It increases tube current on the anode side

Answer

It reduces off-focus radiation

Answer

It improves contrast resolution on the cathode side

Question 3

A radiographer notices the X-ray tube makes a loud grinding noise during rotation. What is the most likely cause?

Accepted Answer

Worn or damaged rotor bearings

Answer

Excessive kVp setting

Answer

Overloaded filament

Answer

Low line voltage

Question 4

What does the term 'effective focal spot size' refer to in X-ray equipment?

Accepted Answer

The projected focal spot size as seen from the image receptor

Answer

The actual surface area on the anode where electrons strike

Answer

The total heat capacity of the anode

Answer

The distance between the focal spot and image receptor

Question 5

Which quality control test is used to evaluate the accuracy of timer settings on an X-ray unit?

Accepted Answer

Spinning top test or digital timer tester

Answer

Step wedge test

Answer

Half-value layer measurement

Answer

Focal spot measurement

Question 6

In a three-phase, 12-pulse X-ray generator, what is the approximate voltage ripple?

Accepted Answer

4%

Answer

100%

Answer

13-25%

Answer

Less than 1%

Question 7

What happens to radiographic density if the source-to-image distance (SID) is doubled while all other factors remain constant?

Accepted Answer

Density decreases to one-quarter

Answer

Density doubles

Answer

Density quadruples

Answer

Density decreases by half