# Quiz 04- Radiographic Review #2

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Radiography is the act of taking images produced on sensitive plates by X-rays or gamma rays. During the past few days in class we covered radiography and what it entails. Give the review questions below a try as you prepare for the upcoming exams. All the best as you tackle them. Question Banks of Radiography with Limited Scope on Core.

• 1.

### By using a___________ transformer, the incoming voltage can be adjusted in order to heat the filament of an x-ray tube; is about ________volts

• A.

Step up,1000 to 3000 volts

• B.

Step up, 500 to 1000 volts

• C.

Step down, 100 to 200 volts

• D.

Step down, 10 to 12 volts

• E.

Step down, 18 to 25 volts

D. Step down, 10 to 12 volts
Explanation
By using a step-down transformer, the incoming voltage can be adjusted in order to heat the filament of an x-ray tube. The filament typically requires a lower voltage range of 10 to 12 volts, hence a step-down transformer is needed to decrease the voltage from the incoming supply.

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• 2.

### Which of the following are the process by which x-ray are produced?

• A.

Brems

• B.

Photoelectric

• C.

Characteristic

• D.

Compton

• E.

A & B are correct

• F.

C & D are correct

• G.

B & C are correct

E. A & B are correct
Explanation
The correct answer is A & B are correct. X-rays are produced through two main processes: bremsstrahlung and photoelectric effect. Bremsstrahlung occurs when a high-energy electron is deflected by the electric field of a nucleus, causing it to emit an x-ray photon. The photoelectric effect happens when an x-ray photon interacts with an inner shell electron, causing it to be ejected and creating an x-ray. Therefore, both bremsstrahlung and photoelectric effect are involved in the production of x-rays.

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• 3.

### Which meter registers indicating x-ray exposure?

• A.

Voltmeter

• B.

Line Voltage compensator

• C.

Milliamp meter

• D.

C. Milliamp meter
Explanation
A milliamp meter is used to measure the current flowing through a circuit in milliamperes. In the context of x-ray exposure, the milliamp meter would be used to measure the amount of current passing through the x-ray machine, which is directly related to the intensity of the x-ray radiation being emitted. Therefore, the milliamp meter is the meter that registers and indicates x-ray exposure.

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• 4.

### Which of the following applies to the filament transformer?

• A.

A step up transformer is needed

• B.

A step down transformer is needed

• C.

An auto-transformer is needed

• D.

Must have at least four diodes

B. A step down transformer is needed
Explanation
A step down transformer is needed for the filament transformer because it is used to reduce the voltage from the power source to a lower level suitable for powering the filament of a device. This is necessary because the filament typically requires a lower voltage than the power source provides.

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• 5.

### The purpose of the circuit breaker is to

• A.

Prevent electrical shock to the patient

• B.

Decrease exposure to the patient

• C.

• D.

Explanation
The purpose of a circuit breaker is to prevent overloading. When there is an excessive amount of current flowing through a circuit, the circuit breaker automatically trips and interrupts the flow of electricity. This helps to protect the electrical system and prevent damage to the wiring and appliances. By preventing overloading, circuit breakers also help to reduce the risk of electrical fires.

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• 6.

### Most of the energy of the electrons from the cathode is converted to

• A.

X-rays

• B.

Scatter

• C.

Heat

• D.

Primary beam

C. Heat
Explanation
The correct answer is heat because when electrons from the cathode strike the anode in an X-ray tube, they transfer their kinetic energy to the anode, causing it to heat up. This heat energy is then dissipated through various cooling mechanisms. While some of the energy is converted to X-rays, the majority is converted to heat.

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• 7.

### What is the unit of current

• A.

Kvp

• B.

Ohms

• C.

Volts

• D.

Amperage

D. Amperage
Explanation
The unit of current is amperage. Amperage is a measure of the rate at which electric charge flows in a circuit. It is named after the French physicist André-Marie Ampère, who made significant contributions to the understanding of electromagnetism. The other options listed in the question, Kvp, Ohms, and volts, are not units of current. Kvp stands for kilovolt peak and is a unit of voltage, Ohms is a unit of resistance, and volts is also a unit of voltage.

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• 8.

### The source of electrons  is the

• A.

Anode

• B.

Cathode

• C.

Filament

• D.

Focal spot

• E.

B & C are correct

• F.

A & D are correct

E. B & C are correct
Explanation
The anode and the cathode are both sources of electrons in a system. The anode is the positively charged electrode where electrons are attracted to, while the cathode is the negatively charged electrode where electrons are emitted from. The filament is not a source of electrons, but rather it is heated up to emit electrons. The focal spot is the area on the anode where the electrons hit and produce X-rays. Therefore, the correct answer is B & C are correct.

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• 9.

### The positive end of the tube is referred to as the

• A.

Anode

• B.

Cathode

• C.

Focal Spot

• D.

Filament

• E.

A & B are correct

• F.

A & C are correct

F. A & C are correct
Explanation
The positive end of the tube is referred to as the anode, and the focal spot is also correct. The anode is the positively charged electrode in the X-ray tube that attracts the electrons emitted from the filament, while the focal spot is the small area on the anode where the electrons are focused to produce X-rays. Therefore, both A and C are correct.

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• Current Version
• Mar 21, 2023
Quiz Edited by
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• Dec 09, 2010
Quiz Created by
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