If You Took Your Boards Today, Could You Pass?
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- 1.
How many heat units are produced on a single phase machine using 100 ma, .02 sec., and 60 kVp ?
- A.
120
- B.
162
- C.
169
- D.
168
Correct Answer
A. 120Explanation
100mA x .02s x 60 x 1 (single phase machine)= 120 heat units produced.Rate this question:
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- 2.
What percentage of the energy in the tube is converted to X-ray photons ?
- A.
1%
- B.
50%
- C.
99%
- D.
75%
Correct Answer
A. 1%Explanation
Only 1% of the energy is converted into x-ray photons. The remaining 99% is converted into heat.Rate this question:
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- 3.
Which of the following measurements is constant in parallel circuit ?
- A.
Volts
- B.
Ohms
- C.
Current
- D.
Amperage
Correct Answer
A. VoltsExplanation
In a parallel circuit, volts are constant. They do not vary through the circuit.Rate this question:
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- 4.
A KUB calls for 70 kVp and 40 mAs. If you select the 200mA station, what time should be used ?
- A.
0.2
- B.
5
- C.
2
- D.
0.5
Correct Answer
A. 0.2Explanation
To calculate the time you must do take the mAs/mA. 40/200=.2Rate this question:
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- 5.
Current cycling from positive to negative is know as:
- A.
Oscillation
- B.
Cycle
- C.
Circuit
- D.
Ampere
Correct Answer
A. OscillationExplanation
Oscillation is current flowing between positive and negative. Think of an oscillating fan that goes from one side of the room to the other.Rate this question:
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- 6.
Which of the following are subatomic particles ?1. Electron 2. Proton 3. Neutron
- A.
1 only
- B.
1 and 2
- C.
2 and 3
- D.
1, 2, and 3
Correct Answer
D. 1, 2, and 3Explanation
Subatomic particles are those found in an atom. Protons and neutrons are found inside the nucleus while electrons are in the orbiting shells of the atom.Rate this question:
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- 7.
A radiograph of the Femur is made using 12 mAs, 70 kVp, 40 inch SID, and a 8 inch OID. If the image of the femur measures 22 inches, what is the actual length of the femur ?
- A.
17.6
- B.
4
- C.
15.8
- D.
Not enough information is given
Correct Answer
A. 17.6Explanation
This is a multistep problem since the formula to find object size (or actual length of the femur) is Image size/MF.
First the Magnification factor must be found. To do this the formula SID/SOD is used. SOD is the SID-OID. Therefore, the MF is 40/32 = 1.25.
Now simply take the image size of 22 as mentioned in the question and divide by the MF of 1.25.
22/1.25 = 17.6Rate this question:
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- 8.
A radiograph of the chest was taken at 72 inches using 5 mAs. The CXR needed to be repeated in a wheelchair in a different room. The new distance is 40 inches. What is the new mAs?
- A.
2
- B.
3
- C.
10
- D.
16
Correct Answer
A. 2Explanation
The formula for the square law should be set up as mAs1/mAs2=D1/D2 squared. In this case, it would be 5/X=72/40 squared (5184/1600). Therefore X= 1.54 (rounded to 2). Without doing any math two answers can be eliminated since when decreasing distance, less mAs is needed. Therefore, the answer must be less than the original 5.Rate this question:
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- 9.
All of the following are true, EXCEPT
- A.
If kVp is doubled, the intensity increases by a factor six
- B.
Increasing the kVp by 15% has the same effect as doubling the mAs
- C.
As kVp increases, scatter visbility increases
- D.
As kVp increases, beam penetration increases
Correct Answer
A. If kVp is doubled, the intensity increases by a factor sixExplanation
When kVp is doubled, there is an increase in penetration. However, it is not by a factor of six. All other options are true; increasing kVp increases penetration, increasing kVp by 15% has the same effect as doubling the mAs, and increasing kVp increases the visibility of scatter.Rate this question:
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- 10.
A great, sharp difference between the black and whites on an image is known as
- A.
Short-scale contrast
- B.
Long-scale contrast
- C.
Subject contrast
- D.
Inherent contrast
Correct Answer
A. Short-scale contrastExplanation
A black and white film is a high contrast film as there is a high difference between black and white. High contrast is also known as short-scale or narrow latitude.Rate this question:
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- 11.
As collimation increases, what happens to Compton scatter ?
- A.
Decreases
- B.
Increases
- C.
Evenly distributes scatter
- D.
No change is seen
Correct Answer
A. DecreasesExplanation
When collimation is increased, field size decreased. Think of increasing the USE of collimation which limits the size of the beam. This limiting of field size decreases the number of x-rays striking the patient which will decrease the amount of Compton scatter created.Rate this question:
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- 12.
To better visualize the colon on an x-ray, it is helpful to introduce
- A.
Lead shields
- B.
Compression
- C.
Atomic numbers
- D.
Contrast media
Correct Answer
D. Contrast mediaExplanation
To better visualize the colon it is helpful to introduce contrast. The high atomic number of the contrast media will produce an image with higher contrast and lead to better visualization.Rate this question:
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- 13.
Which anatomic structure has a high attenuating nature ?
- A.
Bone
- B.
Colon
- C.
Kidneys
- D.
Bladder
Correct Answer
A. BoneExplanation
Bone, because of its high atomic number, absorbs far more radiation than other organs such as the colon, kidneys, and bladder. Therefore, bone shows up as white on the image; the x-rays were absorbed in the bone and did not penetrate the part to expose the IR.Rate this question:
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- 14.
How will high kVp affect radiographic contrast ?
- A.
Produce lower contrast
- B.
Produce higher contrast
- C.
Produce less distortion
- D.
No difference in contrast is detected
Correct Answer
A. Produce lower contrastExplanation
An image created with high kVp creates a low contrast radiograph. Increasing kVP makes scatter more visible and adds shades of gray to the film. When there are more shades of gray on the film there are lower differences between each shade. Therefore, it is a lower contrast radiograph.Rate this question:
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- 15.
What technical factor controls receptor exposure?
- A.
MAs
- B.
KVp
- C.
Time
- D.
Distance
Correct Answer
A. MAsExplanation
mAs and receptor exposure are directly proportional. Meaning, if mAs is increased so is the exposure, by the same amount. For example, if the mAs is doubled, the exposure (density) doubles. If the mAs is tripled, the exposure triples.Rate this question:
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- 16.
Exposure measures the number of x-ray photons created while air Kerma measures the energy of the ions.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Exposure measures the number created, air KERMA measures the total energy of those ions in air.Rate this question:
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- 17.
KERMA is an acronym that means:
- A.
Kinetic Energy Released per unit Mass
- B.
Kinetic Electrons Released Momentum Activity
- C.
Kilovoltage Energy Release Mass
- D.
Kilograms Energy Release Mass
Correct Answer
A. Kinetic Energy Released per unit MassExplanation
KERMA stands for Kinetic Energy Released per unit Mass.Rate this question:
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- 18.
Expectant mothers who are technologists, should wear their baby badge:
- A.
At their waist
- B.
At their collar
- C.
At the thyroid
- D.
None is worn until the baby is born
Correct Answer
A. At their waistExplanation
The baby badge should be worn at the waist underneath the lead apron in addition to the badge that is worn at the collar over the lead apron.Rate this question:
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- 19.
A technologist standing 3 feet from the fluoroscopy table increases their distances from the table to 7 feet. The original exposure was 20 mR/hr. What is the new exposure?
- A.
4
- B.
9
- C.
57
- D.
102
Correct Answer
A. 4Explanation
The formula for the inverse square law is I1/I2=D2/D1 squared. So this problem would be set up as 20/x=7/3 squared. After solving for X as outlined in the video, the answer is 4 mR/hr (rounded).Rate this question:
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- 20.
The bucky slot cover must have this thickness to effectively protect the technologist
- A.
0.25mm lead
- B.
0.25mm aluminum
- C.
0.5mm lead
- D.
0.5mm aluminum
Correct Answer
A. 0.25mm leadExplanation
The bucky slot cover must have a thickness of 0.25mm lead to protect the gonads of the technologist. This thickness assumes that the operator is wearing an apron.Rate this question:
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- 21.
Leakage radiation from the tube is limited to
- A.
1 mGy/hr at 1 meter
- B.
1 Gy/hr at 2 meters
- C.
10 mGy/min at 1 meter
- D.
10 mGy/hr at 2 meters
Correct Answer
A. 1 mGy/hr at 1 meterExplanation
Leakage radiation is limited to 1 mGy/hr at 1 meter at the highest mA and kVp setting.Rate this question:
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- 22.
What is the dose equivalent limits for the lens of the eye ?
- A.
150 mSv
- B.
50 mSv
- C.
250 mSv
- D.
500 mSv
Correct Answer
A. 150 mSvExplanation
150 mSv is the dose equivalent limits for the lens of the eye.Rate this question:
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- 23.
Lead is a protection barrier of choice because
- A.
It has a high atomic number
- B.
It is lightweight
- C.
It has a high melting point
- D.
It has various thicknesses
Correct Answer
A. It has a high atomic numberExplanation
Lead is the barrier of choice because of its high atomic number and ability to absorb x-rays.Rate this question:
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- 24.
All of the following represent a cardinal rule EXCEPT
- A.
Call for assistance
- B.
Minimize the time spent near radiation
- C.
Maximize the distance
- D.
Use a shield
Correct Answer
A. Call for assistanceExplanation
Time, distance, and shielding are the cardinal rules regarding radiation protection.Rate this question:
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- 25.
A technologist standing 2 ft from the fluoroscopy table is exposed to 500 mR of scatter radiation. What will be the exposure dose if the tech moves back 15 ft ?
- A.
9mR
- B.
732mR
- C.
168mR
- D.
1028mR
Correct Answer
A. 9mRExplanation
The formula for the inverse square law is Intensity 1 over Intensity 2 equals Distance 2 over Distance 1 squared. Remember, the problem is inverse because as distance increases, the intensity of the beam decreases. Therefore, this problem should be set up as 500 over X equals 15 over 2 squared. After squaring the two distances and completing the formula the answer is 9 mR. For a reminder on how to find “X” refer to the video on the inverse square law.
Remember, you can easily eliminate 2 answers without doing math. Since the distance (SID) is increasing, that means the intensity of the beam will go down and be lower than the original 500. Think of getting farther from a fire, the intensity of the heat would decrease.Rate this question:
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- 26.
Which of these is a stochastic effect that is unlikely to occur at low doses ?
- A.
Hair loss
- B.
Skin burns
- C.
Cancer
- D.
Soft tissue effects
Correct Answer
C. CancerExplanation
Although it is possible since there is no threshold for cancers (it is a stochastic effect), it is not likely that it would occur at low doses.Rate this question:
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- 27.
No threshold and no dose is safe, best describes the _____________effect
- A.
Deterministic effect
- B.
Non-stochastic effect
- C.
Radiation effect
- D.
Stochastic effect
Correct Answer
D. Stochastic effectExplanation
A non-threshold model shows that no dose of radiation is safe since the first dose shows a response.Rate this question:
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- 28.
The relationship between distance and intensity can be expressed through the
- A.
Length of the distance multiplied by intensity
- B.
Length of the distance divided by intensity
- C.
Filtration
- D.
Inverse square law
Correct Answer
D. Inverse square lawExplanation
The inverse square law is the relationship between the (square of the) distance and intensity of the beam. As SID increases, intensity decreases.Rate this question:
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- 29.
When densely ionizing radiation damages alpha particles 1. They are not changed by the presence of oxygen 2. They are significantly changed by the presence of oxygen 3. No damage is seen during oxygenation
- A.
1 only
- B.
2 only
- C.
1 and 3
- D.
2 and 3
Correct Answer
A. 1 onlyExplanation
When densely ionizing radiation damages alpha particles they are not changed or damaged by the presence of oxygen. Particulate Radiation in the form of Alpha Particles are not more effective in the presence of oxygen.Rate this question:
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- 30.
“LET” stands for
- A.
Linear energy totals
- B.
Life expectancy transfer
- C.
Linear energy transfer
- D.
Less energy totals
Correct Answer
C. Linear energy transferExplanation
LET stands for linear energy transfer. This is the energy that is transferred to the tissue as it traverses the patient. X-ray has a relatively low LET as most of its energy exits the patient. However, Alpha has a very high LET as the energy is not penetrating enough to exit the patient therefore it transfers all of its energy.Rate this question:
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- 31.
Dose area product (DAP) in many fluoroscopy machines is a equal to:
- A.
Air kerma (Gy) X area of the exposure field (cm2)
- B.
Gray X area of the exposure field (cm2)
- C.
Entrance skin exposure X fluoro. time (min)
- D.
Air kerma (Gy) X fluoro. time (min)
Correct Answer
A. Air kerma (Gy) X area of the exposure field (cm2)Explanation
Dose-area product is equal to the air kerma (in Gy) multiplied by the area of the exposure field (in cm2).Rate this question:
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- 32.
ESE means
- A.
Entrance skin exposure
- B.
Estimated somatic exposure
- C.
Estimated skin exposure
- D.
Entrance somatic exposure
Correct Answer
A. Entrance skin exposureExplanation
ESE means entrance skin exposure.Rate this question:
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- 33.
If a patient is standing at the vertical board for a radiograph of the clavicle, how many degrees should the tube be angle for an AP Axial Projection?
- A.
0
- B.
0-15 cephalic
- C.
15-30 cephalic
- D.
30-45 cephalic
Correct Answer
B. 0-15 cephalicExplanation
This angle helps to project the clavicle above the ribs and scapula. 15-30 degree angulation is used when the patient is supine.Rate this question:
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- 34.
What is the anatomy on the humerus that is know for the most common area for trauma?
- A.
Bicipital groove
- B.
Anatomical neck
- C.
Surgical neck
- D.
Greater tubercle
Correct Answer
C. Surgical neckExplanation
This is the most common area of fractures seen in the humerus. Fractures of the anatomical neck are less common, but more damaging. This is in the area of the growth plate.Rate this question:
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- 35.
What type of bone is the scapula considered?
- A.
Long bone
- B.
Short bone
- C.
Irregular bone
- D.
Flat bone
Correct Answer
D. Flat boneExplanation
The scapula is a triangular bone that is very flat.Rate this question:
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- 36.
Which view would best illustrate the olecranon process in profile?
- A.
AP elbow
- B.
AP medial oblique elbow
- C.
AP lateral oblique elbow
- D.
Lateral elbow
Correct Answer
D. Lateral elbowExplanation
The lateral view of the elbow demonstrates the olecranon process and the fat pads in profile.Rate this question:
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- 37.
A patient has a right hip injury from an MVA. They are brought to the emergency room by an ambulance. The patient is immobilized to a back board. Which views would be most appropriate to assess for a fractured hip?
- A.
AP hip and Cleaves position
- B.
AP pelvis and a cross-table lateral
- C.
AP pelvis and a frog lateral
- D.
AP pelvis
Correct Answer
B. AP pelvis and a cross-table lateralExplanation
Two opposing views are needed to rule out a fracture. An AP pelvis is needed for comparison. A cross-table lateral is needed, since the patient is immobile and cannot move. The left leg can be moved and the image can be directed a cross the table.Rate this question:
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- 38.
If the Radiologist asked for an image that would demonstrate the coronoid process, what view would he need?
- A.
AP elbow
- B.
Medial oblique elbow
- C.
Lateral oblique elbow
- D.
Lateral elbow
Correct Answer
B. Medial oblique elbowExplanation
Rotating the elbow inward 45 degrees will demonstrate the coronoid process.Rate this question:
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- 39.
Where is the central ray centered for a KUB?
- A.
1 inches above the iliac crest
- B.
1 1/2 inches above the iliac crest
- C.
At the iliac crest
- D.
1 inch below the iliac crest
Correct Answer
C. At the iliac crestExplanation
To center for a KUB the central ray should be centered to the mid-sagittal plane and at the iliac crest.Rate this question:
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- 40.
In a car accident, a patient injured their left anterior thorax (Ribs) on the steering wheel. Which view would best demonstrate this area?
- A.
LAO
- B.
RAO
- C.
RPO
- D.
Lateral
Correct Answer
B. RAOExplanation
The ribs farthest from the IR are projected free of superimposition with the spine.Rate this question:
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- 41.
The acromion is a feature on what bone?
- A.
Clavicle
- B.
Scapula
- C.
Humerus
- D.
Spine
Correct Answer
B. ScapulaExplanation
The acromion is a bony process on the scapula.Rate this question:
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- 42.
If a patients' ASIS measures 17 cm, which angle should be used for a lateral view of the knee?
- A.
5 degrees cephalic
- B.
5 degrees caudal
- C.
Perpendicular
- D.
All of the above will are true
Correct Answer
A. 5 degrees cephalicExplanation
No matter the patient size, a 5 degree cephalic angle is added to lateral knees.Rate this question:
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- 43.
What is the largest known sesamoid bone in the body?
- A.
Talus
- B.
Calcaneus
- C.
Olecranon
- D.
Patella
Correct Answer
D. PatellaExplanation
A sesamoid bone is a bone embedded within a tendon or a muscle. The knee is a complex joint held together by ligaments and tendons and the patella sits anteriorly.Rate this question:
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- 44.
When the patients head is lower than their feet it is termed?
- A.
Supine
- B.
Fowler
- C.
Trendelenburg
- D.
Prone
Correct Answer
C. TrendelenburgExplanation
Trendelenburg is when the head is placed downward lower than the feet. This may be done for myelogram procedures. Fowler, which is the opposite position, is the feet lower.Rate this question:
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- 45.
For a patient that is diabetic and scheduled for a fluoroscopy examination, what precautions should be made?
- A.
Schedule them late in the morning so they can get their rest
- B.
Schedule them late in the evening so they can receive their daily medications
- C.
Schedule them first in the morning
- D.
Diabetics should not have contrast medium
Correct Answer
C. Schedule them first in the morningExplanation
Diabetics must monitor their insulin levels. It is difficult for them to be NPO since their insulin levels will drop if they go a long time without eating. If they are scheduled early and complete their procedure early then they can eat sooner.Rate this question:
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- 46.
Proper body mechanics for lifting a patient include which of the following?1. Lift with your back2. Stand with your feet shoulder width apart3. Bend your knees slightly
- A.
1 and 2 only
- B.
1 and 3 only
- C.
2 and 3 only
- D.
1, 2, and 3
Correct Answer
C. 2 and 3 onlyExplanation
Low back injuries are common for healthcare workers. To avoid this stand width your feet shoulder width apart, slightly bend your knees, and lift with your legs and not your back.Rate this question:
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- 47.
"If you don't hold still, I will have to stick you again with this needle!" is an example of:
- A.
False imprisonment
- B.
Battery
- C.
Assault
- D.
Negligence
Correct Answer
C. AssaultExplanation
Assault is the threat of touching a person in a harmful manner. Our patients may be afraid and they do not always hold still. By making this statement, we are guilty of assault.Rate this question:
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- 48.
Res ipsa loquitur means:
- A.
The defendant is wrong
- B.
Let the master respond
- C.
Guilty as charged
- D.
The thing that speaks for itself
Correct Answer
D. The thing that speaks for itselfExplanation
A defendant was negligent in tort law. The act was so bad and obvious that it speaks for itself, there is no need for further explanation. Such as; hemostat left in a patient during an operation.Rate this question:
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- 49.
All of the following can cause a fire to burn EXCEPT:
- A.
Gas
- B.
Oxygen
- C.
Burning odor
- D.
Heat
Correct Answer
C. Burning odorExplanation
An odor is the only option that can not cause a fire to burn.Rate this question:
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- 50.
When reading a blood pressure, the bottom number is called;
- A.
Systolic
- B.
Diastolic
- C.
Cardia
- D.
Sinus
Correct Answer
B. DiastolicExplanation
The bottom number, diastolic, is the measurement when the heart is at rest, in between beats.Rate this question:
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Nov 01, 2019Quiz Edited by
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