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Rad Physics Test 1
Carlton Adler
Question | Answer |
---|---|
Current is | |
liberated as heat | |
inhibit movement of electrical charge | |
If the distance between two electrical charges is doubled, the force between them is | |
Resistance is | the opposition to the flow of electrons |
If a conductor is positively charged | is deficient in electrons |
The mA is a unit of | current |
A magnetic field is produced by | electric charges in motion |
A diode electron tube | can be used for rectification |
The process of electrons being emitted from heated metallic surfaces is called | thermionic emission |
A generator is a device that converts | mechanical energy into electrical |
A simple DC generator has essentially the same construction as an AC generator except that a DC generator has | a commutator |
A rectifier | converts AC to DC |
A motor is a device that converts | heat energy into electrical energy |
A bar magnet and a wire loop move with the same linear velocity. What is the voltage induced in the wire? | zero |
Conventional current flows | from anode to cathode |
Where is the stator of the anode induction motor located | outside the glass envelope and outside the rotor |
The exposure shift on an x ray machine is intended to | both initiate and terminate the exposure |
The exposure switch is found between the | autotransformer and the timer circuit |
All of the following are radiographer-operated controls except | generator selection |
The advantage of a curved top radiograph table is the | smaller object image distance |
The Bucky tray consist of | a moving 17X17 grid |
Backup time | cannot exceed the tube limit and should not be set at 150 percent of expected manual mAs |
Radiographic rooms equipped with a tilting table are primarily designed for performing __ procedures | diagnostic and fluroscopic |
The height of the average radiographic tabletop to the floor is __ inches | 40 |
Tube suspension systems include which of the following | overhead tube suspension, mobile tube suspension system and c arm tube suspension |
Which tube suspension system offers the greatest multidirectional movement? | overhead tube suspension |
Nearly all x ray equipment operate from an incoming line of | 210v |
When full wave rectification is applied to three phase current, a __ ripple is produced | voltage |
Ancillary equipment for tilting tables includes | a footboard, handgrips, and shoulder supports |
The diagnostic x ray range is qpproximately | 10 to 1,200 mA, 0.001 - 10 seconds, and 25 to 150 kVp |
The incoming line current is supplied | to approximately 60 volts |
An indicated current in a wire loop | can result only from an alternately expanding and contracting magnetic field |
A stator consist of | electromagnets |
Electric potiental is measured in | volts |