X-ray: Rectifiers, Transformers And Circuits! Trivia Quiz
A lab technician needs to know about operating an X-ray machine and the Rectifiers, Transformers, and Circuits. Over the past weeks, we have learned a lot about the X-ray machine and how to read the results and decipher what is affecting the patient. Get to review what you understood by taking this quiz. All the best and read more about what you get wrong!
- 1.The most common device used to create the high potential difference (kilovoltage) across the x-ray tube is the high tension:
- A.
Autotransformer
- B.
Variable resistor
- C.
Saturable reactor
- D.
Transformer
- 2.The current passing between the secondary of the high tension transformer and the rectifiers is best described as a type of:
- A.
High voltage (kV) AC
- B.
Low voltage AC
- C.
High voltage (kV) DC
- D.
Low voltage DC
- 3.A single diode in a circuit having an A.C. power source will produce a ______wave rectified signal.
- A.
Single-phase, one quarter
- B.
Single –phase half
- C.
Single-phase, three quarter
- D.
Single-phase, full
- 4.The part of the x-ray generator that supplies the high voltage necessary between the cathode and the anode is called the:
- A.
Filament circuit
- B.
Main x-ray circuit
- C.
Low voltage circuit
- D.
Thermionic emission circuit
- 5.Three-phase, full wave rectified A.C. has ________peaks in a single cycle.
- A.
3
- B.
6
- C.
9
- D.
18
- 6.The type of unit most likely to possess the smallest voltage ripple is a :
- A.
Full wave, single-phase unit
- B.
3-phase, 6 pulse unit
- C.
Self-rectified unit
- D.
High frequency unit
- 7.In a stationary anode tube, the target is imbedded in an anode made of:
- A.
Tungsten
- B.
Molybdenum
- C.
Copper
- D.
Rhenium
- 8.The anode of a modern rotating anode tube is generally composed of tungsten and: 1. Copper 2. Rhenium 3. Molybdenum
- A.
1&2
- B.
1 & 3
- C.
2 & 3
- D.
1,2, & 3
- 9.Tube support systems available for use in modern diagnostic imaging equipment include;
- A.
Overhead ceiling support versions
- B.
Floor-to-ceiling support versions
- C.
C-arm support versions
- D.
B & C only
- E.
A, B, and C
- 10.Which of the following is an advantage that a rotating anode tube will have over a stationary anode tube? 1. Increased heat dissipation 2. Higher tube ratings 3. Reduced roughing of the target
- A.
1 only
- B.
2 only
- C.
3 only
- D.
1,2, and 3
- 11.The majority of heat in a modern rotating anode tube is dissipated through the:
- A.
Conduction of heat through the stem of the anode
- B.
Transfer of the space charge to the anode disk
- C.
Passage of radiant heat to the tube envelope
- D.
Absorption of electrons by the io sink
- 12.Which of the following is used to focus the high speed electron stream toward the target of the anode?
- A.
Lead collar
- B.
Nickel focusing cup
- C.
Copper anode
- D.
Titanium lens
- 13.In modern x-ray equipment, the device most often used for current rectifications is a(an):
- A.
Modified x-ray tube
- B.
Thermionic valve tube
- C.
Solid state diode
- D.
Ionization chamber
- 14.The selection of voltage to the high tension transformer is most commonly made by adjusting the:
- A.
Exposure timer
- B.
Line voltage compensator
- C.
Filament transformer
- D.
Autotransformer
- 15.The high amperage necessary to cause thermionic emission in the filament circuit is developed from the use of a:
- A.
Step-up transformer
- B.
Step-down transformer
- C.
Condenser
- D.
Rectifier
- 16.The type of meter that is used to measure the current (tube current) between the electrodes of an x-ray tube is the:
- A.
Pre-reading kilovolt meter
- B.
Multiphasic ohm meter
- C.
Milammeter –seconds meter
- D.
Synchronous ammeter
- 17.The control for the amount of filament current in most modern radiographic units is directly related to the:
- A.
Timer setting selection
- B.
Kilovoltage selection
- C.
Millampere slection
- D.
Focal spot size selection
- 18.Most x-ray machines used in the United States are designed to operate on a 220 volt or 440 volt:
- A.
60 hertz, alternating current power supply
- B.
60 hertz, direct current power supply
- C.
120 hertz, alternating current power supply
- D.
50 hertz, direct current power supply
- 19.The pre-reading kV meter measures the ____________on the secondary side of the autotransformer:
- A.
Millamperage
- B.
Kilovoltage
- C.
Wattage
- D.
Voltage
- 20.A transformer with more secondary windings than primary windings:
- A.
Has a greater secondary voltage
- B.
Is a step-down transformer
- C.
Has a lower secondary voltage
- D.
Is an autotransformer
- 21.The process by which alternating current is converted into pulsating direct current is termed:
- A.
Rectification
- B.
Polarization
- C.
Depolarization
- D.
Electrification
- 22.3-phase current consists of three single-phase voltage wave forms separated by:
- A.
30 degrees
- B.
60 degrees
- C.
120 degrees
- D.
180 degrees
- 23.Four diodes can be used in a circuit having an A.C. power source to produce a ______wave rectified signal.
- A.
Single-phase, one quarter
- B.
Single-phase, half
- C.
Single-phase, three quarter
- D.
Single-phase, full
- 24.The turns ratio of a(an) _______can be varied by selecting the number of turns between connections on a single coil
- A.
Step-up transformer
- B.
Autotransformer
- C.
Step-down transformer
- D.
ACME III transformer
- 25.To raise the voltage higher (kvP range) than the autotransformer is capable of raising it, a ____transformer is included in the tube circuit (Main x-ray circuit).
- A.
Step-up
- B.
Step-down
- C.
Filament
- D.
ACME III
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