The thickness of the material required to reduce the intensity of the beam to 1⁄2 of its original value

The formula for heat unit in a single phase high voltage generator is?

The powerhouse of the cell:

The aluminum filtration reduces patient dose by:

What is the minimum equivalent of total filtration required for diagnostic x-ray operating above 70 kVp?

In the early 1900's, Bergonie and Tribondeau formulated some theories about the radiosensitivity of biologic tissue. The Law of Bergonie and Tribondeau formulated in part that:

What is the minimum threshold dose for death to occur for a whole-body exposure?

One coulomb of electron charge is equivalent to how many electrons?

Material added to tungsten for construction of a long-lasting filament

The breakdown of protein metabolism produces:

For resistor of 5 ohms, 10 ohms, 15 ohms and 20 ohms are connected in a series circuit. Determine the unknown values describe in number 84-87 if the circuit draw 110 volts from an AC source. The total resistance is?

The technologist has considerable control over both image quality and patient dose, depending on which materials or methods are selected for each examination. One technique that reduces patient dose and improve image quality at the same time, day is:

Exposure reproducibility should be maintained within ‡ %

At 100 kVp approximately how many % of bremsstrahlung x ray is produced?

The most means of reducing patient exposure:

For what purpose is there a negative electrical charge on the focusing cup?

When fast moving electrons interacts at the nuclear source of a target material its kinetic energy is converted to?

The flow of one coulomb per sec in a conductor is equivalent to one

In mobile radiography, the radiographer should: 1. Stand at least 6 ft from the source 2. Stand behind a corner, if possible 3. Use low kVp techniques

Which one of the ff components of the diagnostic x-ray tube is on the positive side of the tube?

Pair production produces all of the following except:

Which of the following is not a function of the anode?

For testing white light leaks, frequency of test is done every 1. Week 2. Month 3. 6 months 4. As needed

Used chemical bottles can be recycled:

Based form the principle of radiation protection under Distance, when the distance is doubled, the intensity is:

Which of the following are used to check for focal spot size? 1.Star pattern 2.Pinhole camera 3.Slit camera 4. Wire mesh

In general xray quantity will increase with?

The x-ray emission spectrum principally depends on which of the following

Sources of unnecessary exposure: 1. annual chest radiograph 2. routine fluoroscopy in person older than 40 years 3. mammography examination in high risk female

Rectification used:

During this period, the person is free of visible effects.

AEC ion sensitivity chambers have to be sensitive within +/- ___ % in the same areas.

The transition of an outer orbital electron to an inner orbital shell produces?

The following are considered as deterministic effects of radiation exposure, except:

For resistor of 5 ohms, 10 ohms, 15 ohms and 20 ohms are connected in a series circuit. Determine the unknown values describe in number 84-87 if the circuit draw 110 volts from an AC source. The power generated in the circuit is _____ watt?

The maximum no. of electrons in the n-shell is?

30. A film badge monitoring device used for monitoring of personnel can: 1. record the image of the aluminum or copper filters which are contained in the plastic holder 2. be compared with a control badge by the monitoring company 3. record doses below 10 millirem

Which of the following has the greater shielding value?

How many half - value layers of filtration must be added to the primary beam to reduce its intensity to approx 3% of its original value?

Cardinal principles of radiation protection: 1. time 2. distance 3. sheilding

The shielding of a typical x-ray room is:

One disintegration per second of activity is equal to.

A stationary anode will most likely used in which of the following

The function of x-ray tube rating chart

The minimum HVL required for 3 phase/high frequency units using 70kVp is about mmAl,

The radiographic exposure is made at 500 mA; 100 ms the equivalent mAs is?

mAs is a unit of

Thermoluminescent dosimeters:

Among the following interactions, which of these does not produce scattered x-ray?

Which of the following are used to test for kVp accuracy? 1. Wisconsin cassette 2. Sussex cassette 3. Ardran-Crookes

It results from maintaining the anode at elevated temperatures for prolonged periods.

Which among these following interaction where ionization occurs

A process where an unstable nuclei spontaneously emits radiation to reach a stable state.

The sequence of events following high - level radiation exposure leading to death within days or weeks is called the:

The fundamental unit of the electromagnetic radiation

What term is used to describe radiation damage that increases the probability of including a late effect but will not increase the severity of the effect (ex. Carcinogenesis, life shortening)?

Barrier classification which includes all the different protective apparels:

The Mean Survival Time (MST) for Gl syndrome is days

High frequency generator is recommended rather than high voltage generator because of the following reasons EXCEPT:

How much of Tc-99 m will remain after 4 physical half-life if the initial activity was 2 mCi?

Being a radiation worker, the expected days of life lost is

Application/s of radiation dose - response relationship:

When testing for white light leaks, you are recommended to stay inside the darkroom for minutes while the safelight is switched off?

The recommended distance of facing down safelight from the working bench is approximately cm.

The characteristics x-ray emission spectrum principally depends on which of the following?

It is the unit of energy used to measure the heat capacity of the x-ray tube/unit.

The accepted tolerance level for collimation is ±____ % SID

The division wherein the nucleus swells and the DNA becomes more prominent:

What should be used to examine areas that have poor detail?

Refers to the particle that have lower range

Within few months after x - ray was discovered they were being used for medical diagnosis and treatment, resulting in the first visible biologic effects of radiation on humans. Which of the following is an immediate or early effect of radiation?

The equivalent value of 1mCi in Bq is

For resistor of 5 ohms, 10 ohms, 15 ohms and 20 ohms are connected in a series circuit. Determine the unknown values describe in number 84-87 if the circuit draw 110 volts from an AC source. If the four resistors are connected in a parallel circuit, what is the total resistance?

A sun-burn like reddening of the skin resulting to long exposure to radiation

The target theory is a concept for classifying radiation effects in the cellular level. The basis of this theory is that in every cell there is a significant target, if rendered nonfunctional will result in death of cell. Which of the following is that most important molecular target?

The number of Half lives required to reduce the activity to 1/32 of the original amount

The x ray emission spectrum represents

Tc 99-, has initial activity of 50mCi after its activity will be 25mCi.

The Bucky slot cover is in place to protect the 1. Patient 2. Radiologist 3. Radiologic Technologist

A pregnant radiographer must have how many ersonnel monitoring device?

Which of the following group of people have higher dose limits?

The heel effect most likely to increase when reducing the;

For resistor of 5 ohms, 10 ohms, 15 ohms and 20 ohms are connected in a series circuit. Determine the unknown values describe in number 84-87 if the circuit draw 110 volts from an AC source. The total current is?

Which among the following is the most accurate way to test for focal spot size? 1.Star Test pattern 2.Pinhole camera 3.Slit camera 4.Wire mesh

Weekly MPD for occupational exposed persons:

Radiation are categorized as to primary and secondary radiation. Which of these is considered a primary radiation?

When the mAs is increased the x-ray quantity?

Normally the x-ray emission spectrum contains?

Part of Cathode assembly 1. Filament 2. Target 3. Focusing cup

The following describe stochastic effects EXCEPT:

Acute radiation lethality follows a response relationship.

The continuous x-ray emission principally depend on which of the following

The accepted tolerance level for exposure linearity % ____ > 10ms

A fluoroscopic examination at 85 kVp at 4mA, single phase requires a 4mins the number of anode heat units produced would be approximately?

The following are the established protocol for radiography of the pregnant patient, EXCEPT:

its purpose is to absorb soft x rays and improves the quality of the x ray beam

Which of the following statement correctly describes the predicting aspect of the latent period?

If the quality factor (QF) of ionizing radiation is higher, relative biological effectiveness:

It is the most critical, target molecule in the body that serves as the command and control for cell function.

For x-ray/light beam alignment, which of the following is/are used? 1. 8 coins 2. 4 Paper clips 3. Lead markers 4. Star test