Physics 2 test 1

How many alterations in the direction of the current flow occur in 0.10 sec in a 60Hz AC current

• 6

• 12

• 60

• 120

Where on the x-ray circuit is the rectification circuit located

• between the semiconductors and the valve tubes

• between the step-down transformer and the rheostat

• between the step-up transformer and the x-ray tube

• between the thermionic diode tubes and the x-ray machines

the exposure switch on an x-ray machine is intended to

• initiate the exposure

• terminate the exposure

• both initiate and terminate the exposure

• rotate the anode up to speed

electrical device used to adjust the mA selection is a/an

• autotransformer

• stator

• diode

• variable resistor

the mA selector is found between the

• incoming line and the exposure switch

• autotransformer the timer circuit

• exposure switch and step-up transformer

• incoming line and the step-down transformer

all the following are the radiographer-operating controls except

• kVp selection

• timer selection

• rotor speed

• mA selection

the diagnostic x-ray range is approximately

• 10 to 1200 mA

• 0.001 to 10 sec

• 25 to 125 kVp

• 50-300 columbs

when using AEC at 80 kVp, backup times

• must not exceed 600 mAs

• are of no concern due to the AEC reliability

• May range from 600 to 2000 mAs

• Should be manually set at 300% of the expected manual mAs

to protect the radiographer during x-ray exposures

• operator controls are on high voltage site of circuit

• the exposures switch may be located remotely in the exam room to improve pt safety

• release of the switch initiates the exposure sequence

• the mA and kVp selection are on the low voltage side of the circuit

Which tube suspension system offers the greatest multidirectional movement

• overhead tube suspension system

• floor to ceiling suspension

• floor tube suspension system