Brainarium

An exposure time of 0.02 seconds is equal to how many milliseconds? - CORRECT ANSWER - 20 msec The number 9×2 is equal to: - CORRECT ANSWER - 18 The number 4 is the square root of: - CORRECT ANSWER - 16 When 62 kVp is increased by 30%, the result is approximately: • CORRECT ANSWER - B. 81 kVp When 230% is expressed as a decimal, the result is: - CORRECT ANSWER - 2.3 A radiographic image is made using 500 mA, 0.1 sec., 80 kVp, and 48 inches SID. The value of the mAs for this exposure i...

1. SI radiation unit of absorbed dose is: o CORRECT ANSWER-gray 2. SI radiation unit to express radiation intensity in the air is: o CORRECT ANSWER-coulomb/kilogram (c/kg) 3. Which type of x-ray photon interaction with the body is primarily responsible for radiation absorbed by the body? o CORRECT ANSWER-photoelectric 4. NCRP recommendation for lead equivalency of aprons used for protection: o CORRECT ANSWER-0.5 mm 5. Four essential elements required for x-ray production: o CORRECT ANS...

phalanges - CORRECT ANSWER - digits of the hand metacarpals - CORRECT ANSWER - located in palm area of hand anterior (palmar) - CORRECT ANSWER - surface of the hand that should be in contact with the IR when performing a PA projection medial - CORRECT ANSWER - surface of the hand should be in contact with the IR when performing a routine lateral projection position of the wrist when performing the PA oblique projection - CORRECT ANSWER - coronal plane of wrist at 45 degree angle to IR w/ ...

According to Dalton's law, hypoxia results at high altitudes because: A) decreased temperature make oxygen less available B) as barometric pressure decreases, oxygen concentration decreases. C) while oxygen concentration remains unchanged, decreased partial pressure makes is less available. D) barometric pressure increases therefore oxygen is also at a higher pressure. - CORRECT ANSWER-C) while oxygen concentration remains unchanged, decreased partial pressure makes is less available. ...

What is aviation physiology? • Study of the effects of high altitude on the body Impact of flight depends on what? • Altitude and length of exposure What are the environmental changes of greatest physiological significance involved in flight? • Barometric pressure, variation in temp and movement at high speeds in multiple dimensions What are the five layers of the atmosphere? • Troposphere, stratosphere, mesosphere, thermosphere and exosphere What is significant about the tropo...

TRUE OR FALSE: selection of the type of aircraft for IFT usually can be done without considering the need for pressurization - CORRECT ANSWER-FALSE TRUE OR FALSE: fixed wing aircraft are best suited for medevacs when the pt needs to be transported between 100-150 km - CORRECT ANSWER-FALSE TRUE OR FALSE: IV access is part of the primary assessment and stabalization of the trauma patient - CORRECT ANSWER-TRUE TRUE OR FALSE: communication is an important component of air medical transport - ...

NGWA EXAM PACKAGE DEAL WITH COMPLETE SOLUTIONS

Could specific capacity be determined in sizing a well screen? Yes, specific capacity (water yield per unit of drawdown) helps determine the appropriate screen size to optimize flow and minimize drawdown. What materials and method for placement of the materials are used in gravel packed wells? Materials: Gravel, typically well-sorted and clean. Methods: Gravity placement, tremie pipe, or reverse circulation to place gravel uniformly around the well screen. Explain the difference between ...

What are some advantages and/or disadvantages of the top head and table drive system? - CORRECT ANSWER: Top head drive: Advantages: Direct torque, better control, less drill string wear. Disadvantages: More expensive, complex maintenance. Table Drive: Advantages: Simpler, lower cost. Disadvantages: Less control, higher drill string wear. Why is it important to keep the bit in gauge? - CORRECT ANSWER: Ensures proper hole diameter, prevents well collapse, and maintains drilling efficienc...

Precautions for sand seams • Reduce air pressure • Use foam/polymers • Monitor cuttings • Advance casing • Slow drilling rate How are samples obtained? • Continuous cuttings • Split-spoon sampling • Drilling fluids/polymers Factors affecting hole cleaning/penetration rates • Air pressure/volume • Formation type • Bit type/condition • Drill pipe size/depth • Cutting size/volume Methods to clean cuttings • Airflow • Foam injection • Polymer use H...

• The primary item which dictates the type of drilling equipment to be used on a site is... - CORRECT ANSWER-... geology. • The commonly used hollow-stem auger system for monitoring well installations... - CORRECT ANSWER-... should include an auger head than can be machined to accent a plate that facilitates well installation below the ground water level. • Which is NOT a component of a monitoring well rig? - CORRECT ANSWER- Mud pump. • What is the minimum size hollow-stem auge...

1. Artesian Pressure is generally... o CORRECT ANSWER: ...a result of gravity and confining beds. 2. What is true about the origin of rocks? o CORRECT ANSWER: 1. Sandstones were once sand deposits and could have been river sand, beach sands, or dune sands. 2. Some limestones contain fossils because they were once the mucky bottoms of shallow seas. 3. Shales were once clay beds. 3. (T/F) Ground water, like surface water, has a tendency to flow downhill. o CORRECT ANSWER: True

National Groundwater Association Water well defined Drilled, cored, bored, washed, dug, driven, jetted excavation, constructed for extracting groundwater. Cable tool drill string Socket, jars, stem, and drill bit Drill String Entire column of string or drill pipe, drill collars, and accessories that transmit fluid and/or rotational power from Kelly (top head drive) to the drill collars and bit. Rotary Drill string Drill bit, Drill collar (stabilizer), Drill pipe, Kelly (top head) Poro...

1. Increasing kVp will ___ optical density. A. Decrease B. Not affect C. Increase D. Eliminate 2. A change in kV by ___% will produce a perceptible change in optical density. Answer: 4% 3. Optical density increases with increasing ___ A. SID B. Collimation C. mA D. Grid ratio 4. Increased exposure time will ___ optical density. A. Decrease B. Not affect C. Increase D. Eliminate 5. mAs must be changed by what % to produce a perceptible change in optical density? Answer: 30% 6. ...

Wavelength - CORRECT ANSWER-X-rays with greater energy have a shorter____ and are more penetrating Diagnostic rays - CORRECT ANSWER-Of the following types of electromagnetic energy, which has the shortest wavelength They are highly penetrating and invisible, They travel in straight lines at the speeds of light - CORRECT ANSWER-Which of the following are accurate statements regarding the characteristics of X-rays Photon - CORRECT ANSWER-The smallest possible unit of electromagnetic energy ...

The reduction of a limited operator's exposure to ionizing radiation can be accomplished by: - CORRECT ANSWER--Decreasing the time in the radiation feild -increasing the distance from radiation source -NOT THIS: using exposure techniques with a low peak kVP(peak must be high) The annual EFFECTIVE DOSE limit for a whole-body dose of occupational radiation over the age of 18 - CORRECT ANSWER-50 mSv or 5 rem What are low-dose techniques? - CORRECT ANSWER--increasing kVp, decreasing mAs -...

The world's largest credentialing organization in medical imaging, interventional procedures, and radiation therapy; certify and register technologists through administration of education, ethics and examination requirements. - CORRECT ANSWER-American Registry of Radiologic Technologists (ARRT) Unintended optical density on a radiograph or another film-type image receptor - CORRECT ANSWER-Artifact Professional organization that promotes research, continuing education and guidelines for...

The smallest component of an image matrix, that represents a specific location in the patient is a a. pixel b. voxel c. histogram d. algorithm Adjustment of window level of a digital image viewed on the monitor allows adjustment of the image a. brightness (density) b. contrast c. spatial detail d. resolution Increasing the window width of a digital image on the monitor a. increases the brightness of the image b. decreases the brightness of the image c. increases the contrast of the...

___ rays originate by disturbing electrons and ____ rays originate from the nucleus - CORRECT ANSWER-X, Gamma X-rays can produce______and____ changes in the human body - CORRECT ANSWER-Chemical, Biologic Identify 2 properties of X-rays - CORRECT ANSWER-Produces secondary & scatter radiation Highly penetrating invisible rays The interaction that occurs when incident x-rays ionize atoms and change direction with a loss of energy is called____ effect - CORRECT ANSWER-Compton The radiation ...

The image receptor (IR) usually consists of the: A. x-ray tube and the tube stand B. cassette and the film C. control console and the transformer D. tube locks and the detent - CORRECT ANSWER-B. cassette and the film collimation and light beam restriction does what? - CORRECT ANSWER-decreases irradiated tissue volume =decreases scatter radiation production which results in increased image contrast-and decreased receptor exposure-reduces pt exposurereduces occupational exposure----IMAGE qu...