2015 Equipment Operation (2)

What is the push or pull on an object called?

		Work
		Force
		Acceleration
		Motion

1. 
   
   
   
   Which recording device used in fluoroscopy provides the highest-quality images?
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   		Photospot camera
   		TV monitor
   		Vidicon tube
   		Cassette spot film

   
   

1. 
   
   
   
   Which part of a flat-panel DR system is made up of layers on a glass substrate?
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   		Scintillator
   		Photodetector
   		PSP
   		TFT

   
   
   
   

The principal advantage of the smaller field of a multifield image intensifier is 
1. improved image quality
2. less magnification 
3. low patient dose

	1 only 1 and 3 only
	2 and 3 only
	3 only

The pre-reading kV meter  measures  the potential difference on the 

		primary side of the autotransformer
		secondary side of the autotransformer
		secondary side of the high voltage transformer
		across the x-ray tube electrodes

1. 
   
   
   What is the unit of force?
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   		Joule
   		Watt
   		Newton
   		Volt

   
   
   
   

1. Electrical potential is measured in ________.
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   		ampere
   		hertz
   		volt
   		watt

   
   

1. 
   
   
   Isotopes have ____ mass numbers and ____ atomic numbers.
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   		the same, the same
   		the same, different
   		different, the same
   		different, different

   
   

The type of current found between the secondary side of the high voltage transformer and the rectifieres is

high voltage DC




high voltage AC




low voltage DC




none of the above

The amount of space charge created at the cathode is primarily controlled by the

	hysteresis kilovoltage
	tube current
	x-ray photons

The step down transformer is most likely to be found in the _____ Circuit

What phenomenon occurs when electrons exposed to x-ray energy experience an immediate transference of light and return to their original ground state?

	Prompt emission Photodiode
	Radiation
	Metastability

The type of meter used for measurement of the current (tube current) between the cathode and anode is a/an

		ammeter
		kilovolt meter
		milli-amperage meter
		ohm meter

1. 
   
   
   
   The use of three phase radiographic units has the advantage of _______ when compared to single phase units 
   1. lower exposure time settings
   2. higher mA settings
   3. more beam penetrability
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   		3 only
   		1 and 2 only
   		2 and 3 only
   		1, 2 and 3

   
   
   
   

1. 
   
   
   
   The signal plate of the television camera tube is part of the:
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   		Cathode
   		Glass envelope
   		Anode
   		Electron gun

   
   
   
   

1. 
   
   
   
   Which of the following is found on the input side of the image intensifierr tube?
   1. photocathode
   2. incandescent screen
   3. liquid crystal 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   		1 only
   		1 and 3 only
   		1 and 2 only
   		2 and 3 only

   
   

In a PSP, latent image formation is the result of:

		Removal of valence electrons trapped in the conduction band.
		Deterioration of PSP following x-ray exposure.
		Destruction of PSP crystals by x-radiation.
		Emission of light from the PSP when exposed to a laser.

1. 
   
   
   
   The squared ratio of the input to output screen diameter in an image intensifier tube is termed the 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   		conversion factor
   		magnification gain
   		minification gain
   		modulation transfer gain

   
   
   
   

For simple AC generators, the value of the induced voltage in the amature loop is maximized when the orientation of the armature as compared to the magnetic field is

		at a node
		at 45 degrees
		at 90 degrees
		at 180 degrees

What is the primary difference of direct DR over indirect DR?

		Requires less exposure
		Lacks the conversion of x-rays to light
		Does not capture x-rays
		No difference

The amperage necessary to cause thermionic emission in the filament circuit is developed from the use of a 

		step up transformer
		step down transformer
		condenser
		rectifier

How many electrons may occupy the M-shell of an atom?


2


8


18


28

1. 
   
   
   
   The key internal component of the television monitor is the:
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   		Electron gun
   		Phosphorescent screen
   		Brightness and contrast controls
   		Cathode ray tube (television picture tube)

   
   
   
   

What happens to electrons trapped in the conduction band following laser exposure?

		Return to valence shells
		Are destroyed
		Conducted as electricity
		Become protons

What part of the CR reader detects light released from the PSP plate?

1. 
   
   
   
   What part of the CR reader detects light released from the PSP plate?
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   		Laser
   		Optics
   		Photodetector
   		ADC

   
   
   
   

1. 
   
   
   Which of the following causes electrons to move in a conductor?
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   		Voltage
   		Amperage
   		Wattage
   		Charge

   
   
   
   

Which part of the digital radiography system converts x-rays to light?

		Scintillator
		Photodetector
		TFT
		Substrate

1. 
   
   
   
   The term used to express the quantity of the ratio of the illumination intensity of the output phosphor to the input exposure rate is the 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   		brightness gain
   		conversion factor
   		flux gain
   		minification gain

   
   
   
   

1. 
   
   
   
   Which computed radiography device is responsible for converting light energy into an electronic signal?
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   		Photodetector
   		ADC
   		Optical filter
   		Photostimulable phosphor

   
   
   
   

1. 
   
   
   
   The operating potential in most image intensifer tubes is approximately 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

   		2 kV
   		25 kV
   		140 kV
   		200 kV