Radiology: X-ray machine Questions with CORRECT Answers (Grade A+)
Question 1:
Define alternating current
Answer:
Current flows in one direction and then flows in the opposite direction in the circuit (cycle)
Question 2:
Define direct current
Answer:
The current flows in only one direction in an electric circuit
Question 3:
Define penumbra
Answer:
Part of shadow of an object which is larger than a point and yet represents a single point on the object
; area of partial shadowing
Question 4:
Define rectification
Answer:
Blocking the reversal of current
Question 5:
Define umbra
Answer:
Area of total shadowing
Question 6:
Define voltage
Answer:
, Unit of measurement that describes the electric potential or force that drives an electric current
through a circuit
Question 7:
Describe what happens if the direction of the flow of the current is reversed
Answer:
The tungsten target becomes the negative pole/cathode and the tungsten filament becomes the
positive pole/ anode. When the current is reversed no X-rays is produced ( no electricity is available so
the current is blocked
Question 8:
The diameter of divergent X-ray beams is limited by :
Answer:
Lead diaphragm
Question 9:
The electrons produced by the thermionic emission effect at the cathode are attracted to :
Answer:
The positively charged anode
Question 10:
The gray the target the greater the..
Answer:
Penumbra and shadow effect on image
Question 11:
The high speed electrons are stopped or slowed down suddenly at the anode and approximately how
much electricity is transferred to heat and how much the X-rays ?
Answer:
98.8% - heat .2% (1%) - X-rays
Question 1:
Define alternating current
Answer:
Current flows in one direction and then flows in the opposite direction in the circuit (cycle)
Question 2:
Define direct current
Answer:
The current flows in only one direction in an electric circuit
Question 3:
Define penumbra
Answer:
Part of shadow of an object which is larger than a point and yet represents a single point on the object
; area of partial shadowing
Question 4:
Define rectification
Answer:
Blocking the reversal of current
Question 5:
Define umbra
Answer:
Area of total shadowing
Question 6:
Define voltage
Answer:
, Unit of measurement that describes the electric potential or force that drives an electric current
through a circuit
Question 7:
Describe what happens if the direction of the flow of the current is reversed
Answer:
The tungsten target becomes the negative pole/cathode and the tungsten filament becomes the
positive pole/ anode. When the current is reversed no X-rays is produced ( no electricity is available so
the current is blocked
Question 8:
The diameter of divergent X-ray beams is limited by :
Answer:
Lead diaphragm
Question 9:
The electrons produced by the thermionic emission effect at the cathode are attracted to :
Answer:
The positively charged anode
Question 10:
The gray the target the greater the..
Answer:
Penumbra and shadow effect on image
Question 11:
The high speed electrons are stopped or slowed down suddenly at the anode and approximately how
much electricity is transferred to heat and how much the X-rays ?
Answer:
98.8% - heat .2% (1%) - X-rays
