FREE RADIOLOGY AND STUDY GAMES ABOUT RADT 334

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FREE RADIOLOGY AND STUDY GAMES ABOUT RADT 334

X-RAY TUBE EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -30 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: What tubes are designed to be turned on and off very rapidly?

Answer:

Grid-controlled tubes

Question 2: Why are x-ray tubes manufactured with two focal spots?

Answer:

The small focal spot is used when better spatial resolution is required.The large focal spot is used when large body parts are imaged and when other techniques that produce high heat are required.

Question 3: What are the three different types of x-ray tube rating charts?

Answer:

Radiographic rating chart, the anode cooling chart, and the housing cooling chart

Question 4: What is the melting point for tungsten?

Answer:

3400

Question 5: What are the three functions of the protective housing?

Answer:

reduces leakage radiation provides mechanical support serves as a way to conduct heat away from the x-ray tube target

Question 6: Most rotating anode x-ray tubes have how many filaments?

Answer:

Two filaments

Question 7: Of the three rating charts, which is the most important?

Answer:

The radiographic rating chart

Question 8: What is the most common cause of tube failure?

Answer:

Tungsten vaporization with deposition on the inside of the glass enclosure

Question 9: What are the three methods or supporting the x-ray tube?

Answer:

Ceiling support, floor support, and C-arm support Question 10: What is the primary support structure for the x-ray tube, which allows the greatest ease of movement and range of position?

Answer:

Ceiling support system Question 11: Electrons that bounce off the focal spot and then land on other areas of the target,causing x-rays to be produced from outside of the focal spot.

Answer:

Off-focus radiation Question 12: The _______ is the positive side of the x-ray tube; it conducts electricity and radiates heat and contains the target.

Answer:

Anode

Question 13: What principle results in an effective focal spot size much less than the actual focal spot size?

Answer:

Line-focus principle

Question 14: What is the most frequent cause of abrupt tube failure?

Answer:

Electron Arcing Question 15: If the _______ of the anode increases too rapidly, the anode may crack and become unstable

Answer:

Temperature

Question 16: What are the two different types of anodes?

Answer:

Stationary and rotating Question 17: The heel effect results in ______ x-ray intensity on the anode side of the beam.

Answer:

reduced Question 18: The primary purpose of the glass envelope of an x-ray tube is to:

Answer:

Provide a vacuum Question 19: _______ is the transfer of energy from one area of an object to another.

Answer:

Conduction

Question 20: The electron cloud near the filament

Answer:

space charge

Question 21: ______ tube currents and _______ exposure times are possible with the rotating anode.

Answer:

Higher, shorter

Question 22: What are the three principal parts of an x-ray imaging system?

Answer:

X-ray tube, control console, and high voltage generator Question 23: What effect results in a smaller effective focal spot and less radiation intensity on the anode side of the x-ray beam?

Answer:

The heel effect

Question 24: What is the actual x-ray source?

Answer:

the focal spot

Question 25: What are the two primary parts of the cathode?

Answer:

A filament and a focusing cup Question 26: _______ is the transfer of heat by the movement of a heated substance from one place to another.

Answer:

Convection

Question 27: The ______ has a limited capacity for storing heat.

Answer:

anode

Question 28: Why is tungsten the material of choice for the target or anode?

Answer:

Its atomic number, thermal conductivity, and high melting point