题目内容

A thin metallic sheet (brass, copper, aluminum, etc) placed at the source to reduce effects of softer radiation is known as _____.

A. an intensifying screen
B. a filter
C. beam collimator
D. a focusing cup

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To produce X-rays, electrons are accelerated to a high velocity by an electrical field and then suddenly stopped by a collision with a solid body. This body is called ______.

A. Cathode
B. Filament
C. Target
D. generator

The reason for using a rotating anode is_____.

A. to reduce heating on the filament
B. to increase radiation output
C. to keep the effective focus small
D. a combination of B and C

The maximum energy of the X-ray quanta is determined by____.

A. Tube voltage kV
B. Dose rate mAs
C. Tube current mA
D. filament current

What’s the function of the radial slots in the anode?

A. to let the anode cool down quickly
B. to hold the cooling oil
C. to relief the mechanical stress
D. to ease the anode manufacture

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