RADT 1085 Final Test Questions and Answers All Correct
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Course
RADT 1085
Institution
RADT 1085
RADT 1085 Final Test Questions and Answers All Correct
What are functions of the filament?
1) primary thermal conductor
2) target surface for high voltage electrons from the filament
3) conducts high voltage from the cathode back to x-ray circuit generator. - Answer-all of these
Wha...
RADT 1085 Final Test Questions
and Answers All Correct
What are functions of the filament?
1) primary thermal conductor
2) target surface for high voltage electrons from the filament
3) conducts high voltage from the cathode back to x-ray circuit generator. - Answer-all
of these
What are the 3 parts of the anode assembly? - Answer-anode, stator, and rotor
Why is a vacuum created in the x-ray tube? - Answer-To remove the air to permit
electrons to flow from cathode to anode without encountering the gas atoms of the air
What type of radiation is composed of photons not produced at the actual focal spot? -
Answer-off-focus
Metal envelope xray tubes are gaining popularity. What are some advantages to a metal
housing x ray tube? - Answer-Prolong tube life because they eliminate the problem of
tungsten vaporization
The only portion of the anode assembly placed outside the vacuum of the envelope is
the - Answer-stator
As the angle of the anode increases and the incident electron beam size remains the
same, the effective focal spot size - Answer-increases
All of the following are preferred cathode filament materials EXCEPT - Answer-copper
what side of the x-ray tube is positive? - Answer-anode
What side of the X-ray tube is negative? - Answer-cathode
Why is tungsten used in the x ray tube? - Answer-It has a high melting point
The amount of radiation that reaches a particular area of the image receptor - Answer-
Exposure
Digital processing which produces changes in image brightness - Answer-window level
Digital processing which produces changes in the range of brightness values, and is
used to control contrast - Answer-window width
, Why is graphite used on the back of the anode? - Answer-It makes the anode lighter
and easier to rotate
where in the tube do you find inherent filtration? - Answer-glass envelope
Where is the rectification circuit located? - Answer-between the step-up transformer and
the x-ray tube
What is the formula for power? - Answer-power = work/time
List the three functions of the x-ray tube anode?
1) it serves as the primary thermal conductor
2) it conducts the high voltage from the cathode back into the x-ray generator circuitry,
3) it serves as the target surface for the high-voltage electrons from the filament -
Answer-all of these
The resistance in a wire decreases as its - Answer-diameter increases
Ohms law is mathematically described as - Answer-R=V/I
Electric potential is measured in - Answer-Volts
An ampere is defined as - Answer-coulomb/sec
The opposition to the flow of electrons - Answer-resistance
A charge would lose most of its energy when it passes through a - Answer-resistor
The unit of electrical power is - Answer-Watt
The milliampere (mA) is the unit of - Answer-current
A device to control resistance - Answer-Rheostat
Electrical components possess a negative side and a positive side. This polarity permits
the application of - Answer-electromotive force (EMF) to enable current flow
10V+5V+12V+3V=30V - Answer-series circuit
lt= l1+l2+l3+ln - Answer-parallel circuit
A magnetic field is produced by - Answer-electric charges in motion
A continuous, expanding and contracting magnetic field is produced by - Answer-
alternating current
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