RHS EXAM, PRACTICE EXAM AND STUDY GUIDE LATEST 2025
ACTUAL EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY
GRADED A+
What are the 3 components to an X-ray Machine? - ANSWER-control panel,
extension arm, tubehead
What does a control panel contain? - ANSWER-1) master switch, indicator light
2) exposure button, indicator light
3) control devices (kV, mA, time)
What is the purpose of an extension arm? - ANSWER-houses the electrical wires
that extend from the control panel to the tubehead and allows for
movement/positioning of the tubehead
What is a tubehead? - ANSWER-tightly sealed, heavy metal housing that contains
the x-ray tube that produces dental x-rays
What are the 8 components to a tubehead? - ANSWER--metal housing
-insulating oil
-tubehead seal
-PID
,-aluminum disks
-x-ray tube
-transformers
-lead collimator
,Metal housing (metal body) does what in a tubehead? - ANSWER--surrounds the
x-ray tube and transformers
-filled with oil and protects the x-ray tube
-grounds the high-voltage components
Purpose of insulating oil? - ANSWER--surrounds x-ray tube and transformers and
absorbs heat created by the production of x-rays
What is a tubehead seal and what does it do? - ANSWER--the aluminum or
leaded-glass covering of the tubehead that permits the exit of x-rays
-seals the oil inside the tubehead and acts as a filter to the x-ray beam.
What is the heart of the x-ray generating system and critical to the production of
x-rays? - ANSWER-x-ray tube
What are the 3 components of an x-ray tube? - ANSWER--lead-glass housing
-negative cathode
-positive anode
What is the purpose of aluminum disks (sheets?) - ANSWER-placed in the path of
the x-ray beam, filter out the nonpenetrating, longer-wavelength x-rays
, Describe a PID (position indicating device) - ANSWER--an open ended, lead lined
cylinder that extends from the tubehead
-aims and shapes x-ray beams
What is the purpose of a transformer? - ANSWER-transformers function to
increase or decrease alternating current voltages
Describe "leaded glass housing" from an x-ray tube - ANSWER--prevents x-rays
from escaping in all directions
-one area has a "window" that permits the x-ray beam to exit the tube and directs
the beam toward the aluminum disks, lead collimator, and PID.
What is the purpose of the cathode (negative electrode)? - ANSWER-to supply the
electrons necessary to generate x-rays
What does the cathode include? - ANSWER-tungsten filament and molybdenum
cup
What is the purpose of the anode (positive electrode)? - ANSWER-convert
electrons into x-ray photons
The consists of a wafer-thin tungsten plate embedded in a solid
copper rod - ANSWER-anode
ACTUAL EXAM QUESTIONS AND CORRECT DETAILED
ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY
GRADED A+
What are the 3 components to an X-ray Machine? - ANSWER-control panel,
extension arm, tubehead
What does a control panel contain? - ANSWER-1) master switch, indicator light
2) exposure button, indicator light
3) control devices (kV, mA, time)
What is the purpose of an extension arm? - ANSWER-houses the electrical wires
that extend from the control panel to the tubehead and allows for
movement/positioning of the tubehead
What is a tubehead? - ANSWER-tightly sealed, heavy metal housing that contains
the x-ray tube that produces dental x-rays
What are the 8 components to a tubehead? - ANSWER--metal housing
-insulating oil
-tubehead seal
-PID
,-aluminum disks
-x-ray tube
-transformers
-lead collimator
,Metal housing (metal body) does what in a tubehead? - ANSWER--surrounds the
x-ray tube and transformers
-filled with oil and protects the x-ray tube
-grounds the high-voltage components
Purpose of insulating oil? - ANSWER--surrounds x-ray tube and transformers and
absorbs heat created by the production of x-rays
What is a tubehead seal and what does it do? - ANSWER--the aluminum or
leaded-glass covering of the tubehead that permits the exit of x-rays
-seals the oil inside the tubehead and acts as a filter to the x-ray beam.
What is the heart of the x-ray generating system and critical to the production of
x-rays? - ANSWER-x-ray tube
What are the 3 components of an x-ray tube? - ANSWER--lead-glass housing
-negative cathode
-positive anode
What is the purpose of aluminum disks (sheets?) - ANSWER-placed in the path of
the x-ray beam, filter out the nonpenetrating, longer-wavelength x-rays
, Describe a PID (position indicating device) - ANSWER--an open ended, lead lined
cylinder that extends from the tubehead
-aims and shapes x-ray beams
What is the purpose of a transformer? - ANSWER-transformers function to
increase or decrease alternating current voltages
Describe "leaded glass housing" from an x-ray tube - ANSWER--prevents x-rays
from escaping in all directions
-one area has a "window" that permits the x-ray beam to exit the tube and directs
the beam toward the aluminum disks, lead collimator, and PID.
What is the purpose of the cathode (negative electrode)? - ANSWER-to supply the
electrons necessary to generate x-rays
What does the cathode include? - ANSWER-tungsten filament and molybdenum
cup
What is the purpose of the anode (positive electrode)? - ANSWER-convert
electrons into x-ray photons
The consists of a wafer-thin tungsten plate embedded in a solid
copper rod - ANSWER-anode
