CRES - Module 111

When working on hard-wired equipment, which of the following is most appropriate to ensure that the circuit breakers are not accidentally turned on while servicing the equipment?

Place a lock and tag on the circuit breakers

Which of the following is the primary advantage of containment over dilution for disposal of radioactive waste?

Minimum radiation hazard to environment

Continuous cuff inflation with no blood pressure reading displayed on an NIBP monitor is most likely caused by which of the following?

Tubing leak

Which of the following components of an image intensifier converts x-ray photons into an electron image?

Photocathode

What is the value of a resistor with color code: brown, green, black, silver?

15 ohms +/- 10%

Optical drive fails during nightly backup; cleaning didn't resolve it. What's the next step?

Ask the technician to replace the backup media

Mammography unit not reaching "ready" status. What's the first step to troubleshoot?

Remove and replace the paddle and verify that the status changes to ready

The upper ten pairs of ribs are joined in front either directly or indirectly through cartilaginous connections to the:

Sternum

Which of the following are the blood cells that contain hemoglobin to carry oxygen?

RBC (Red Blood Cells)

Where is the device's MAC address stored?

NIC card

Which type of commutation utilizes a "break" SCR to remove the voltage from the "make" SCR?

Forced

If a capacitor shows short/zero resistance on a board and the reading doesn't change, what should the technician do?

Lift one leg of the capacitor and measure the capacitor again

Increasing the high voltage to a photomultiplier tube makes it:

more sensitive to light

The appearance of a "goiter" would be associated with dysfunction of which of the following?

Thyroid gland

What is the standard format used in the transfer of medical imaging that utilizes IP address, port, and AE title information?

DICOM

Unshielded twisted pair (UTP) cables are used primarily for:

computer networks

If wires are the same material and length, which has the greatest current-carrying capacity?

0 AWG solid

Which of the following best describes the Health Insurance Portability and Accountability Act of 1996 (HIPAA)?

Sets national standards for the security of electronic protected health information

In Ethernet terminology, which of the following best describes a collision?

Computers transmit at same time

In the diagram, what is the defective component if the waveform across RL is not symmetrical?

Z1 shorted

What is the mAs if a radiographic technique uses 80 mA and 200 ms?

16

In addition to x-ray, which of the following is a form of electromagnetic radiation with sufficient energy to ionize matter?

Gamma ray

Fires involving flammable liquids should only be fought with which of the following fire extinguishers?

Class B

Proper safety precautions for setting up a laser for use include displaying a plaque, wearing goggles, and...?

Set up a three-foot barrier around the laser

Main purpose of the operating console in general radiographic imaging?

Allows for control of the mA, kVp, and exposure time

If SID changes from 40" to 60", what mAs keeps density constant (starting at 10 mAs)?

22.5

Images from new 3D mammography unit aren't being sent to archive. What should you check first?

Verify that the network settings are configured correctly for the archive node

Which transformer has equal primary/secondary voltage and no common ground?

Isolation transformer

Best command for troubleshooting network connectivity?

Ping

First step when under-table tube won't expose in R/F room?

Place the fluoroscopy tower in its "park" position and attempt an exposure

Fastest wireless standard listed?

802.11n

Common network security method?

Firewall

Symbol shown?

Diac

Which of the following is most characteristic of the IEC80001?

Defines the roles, responsibilities, and activities that are necessary for risk management of IT networks incorporating medical devices

Lithotripsy is used for which of the following?

Kidney stones

Which device is used to monitor the ST segment?

ECG monitor

If the peak amplitude is 10 volts, what is the RMS voltage?

- 7.07 volts

What termination impedance should be applied to the last monitor in a TV chain?

75 ohms

Which test device would be best to use when mapping WMTS coverage within a hospital?

Spectrum analyzer

Which of the following permits an image to be captured with contrast material and is overlaid on a live image monitor for guiding catheters?

Road mapping

In an MRI, which of the following is the most likely cause of white pixel test failures?

Defective monitor

If a radiology technician reports that the film processor is producing wet films, which of the following should be considered FIRST?

Dryer temperature

Loss of communication between CR reader and workstation—what should the technician attempt first?

Reboot the reader and workstation

What best describes the minimum temperature at which a liquid gives off vapor that can ignite?

Flash point

Gamma camera detects high counts in one quadrant — what to check first?

Reboot the reader and workstation

Spatial resolution is measured in:

Line pairs per millimeter

Most likely cause of star artifact in head CT scan?

Patient's earring

A 15-pin, 3-row, female DB-type connector on the back of a PC is:

an SVGA port

The Medical Device Data Systems (MDDS) final ruling was established by the FDA to:

Mitigate risks associated with the potential for inaccurate, incomplete, or untimely data transfer, storage, conversion, or display of medical device data

To increase contrast while maintaining the same film density, one could:

Reduce the kVp and increase the mAs.

With a "non-shared" IRQ, what is the total number of IRQs available?

16

Which of the following is RAM that requires a "refresh" process to maintain its data?

DRAM

The pCO₂ of a patient on a ventilator is reading above normal. Which is the most likely reason?

Patient is being under ventilated.

The amount of blackening on an X-ray film defines

Density

If a multimeter in a diode test has extremely high resistance in each direction, what is the condition of the diode?

Open

An integration engine serves what purpose when used with an EMR?

Allows data from disparate systems to flow freely into an EMR flowsheet

Which of the following has the largest wavelength?

Radio waves

If the composite video signal amplitude is only 0.5 volts, the video monitor will have

Low contrast

Which device is most useful in determining the relationship between AC and DC voltages?

Oscilloscope

What is the minimum passing ACR phantom score for image quality evaluation?

Five fibers, three speck groups, three masses

SID is the distance from the

Focal spot to the image receptor

What is the standard used to transfer non-imaging medical data?

HL7

Defective anode bearings cause vibration that:

Decreases image detail

AEC stands for:

Automatic Exposure Control

Max leakage current from frame to ground for fixed equipment with lifted ground?

5 mA

In standby mode, x-ray tube filaments are maintained at:

A sub-emission level

MQSA stands for:

Mammography Quality Standards Act

X-ray intensifying screens reduce the amount of radiation needed for an exposure by...

Converting the x-ray energy to light.

An ultrasound piezoelectric transducer converts electrical energy into what type of energy?

Mechanical

Where would the radiation exit during a PA projected exposure?

Front of the patient

A cracked anode is most likely caused by...

Making a high kV, high mA exposure on a cold tube

Which of the following is the operational point where a transistor is exhibiting forward maximum current flow?

Saturation

Malfunction reported, but device functions properly

Ask the equipment operator to demonstrate the problem

Final step after removing PPE using standard precautions

Wash hands with soap and water

No exposed ground for resistance testing on imaging equipment

The technician should measure leakage current and inspect the ground cord for damage

Skin color when a person is not getting enough oxygen

Cyanotic

Video capture computer fails to display image from C-arm

Video switcher is set to wrong input

Based on a common emitter transistor amplifier circuit, when operating normally, the voltage readings are as follows: Vc = 10.3v, Vb = 1.09v, Ve = 390mv.

Open R4

Where is insulin produced?

Pancreas

What is the most appropriate immediate action if a defibrillator on a code cart has a cut in the power cord insulation?

Remove the device from service and instruct nursing staff to get another defibrillator

Nitrous oxide is stored in gas cylinders colored:

Blue

How should a technician respond at 2:00 a.m. if a CT scanner won't power back up?

The technician should place an after-hours call into the vendor for immediate service

When booting up a system, a message is displayed that reads "Boot device not found." Which of the following would be the most likely cause of this error message?

Hard drive

What type of imaging modality is used to measure body functions such as blood flow, cellular respiration, and sugar metabolism?

PET

In reference to infusion therapy, what is meant by bolus?

The immediate delivery of a fluid or drug versus administration over a period of time

Which of the following best describes a backbone?

Features a high-speed cable run across servers in a network

Which element is used as a nuclear magnet in MR detection?

Hydrogen

X-ray energy to light energy ratio

Conversion efficiency

Fluoro image lost, current flows

Video cable to the monitor is open

Photon gives all energy to electron

Photoelectric effect

MR spin energy transition

Resonance

A 1 µF capacitor with 100 V RMS at 1,000 Hz—what is the RMS current?

628 mA

Which system allows retrieval of patient demographics and imaging orders?

RIS (Radiology Information System)

Where to find compatibility info for a device's transfer syntax settings?

DICOM conformance statement

High-frequency ultrasound results in?

Shallow penetration with better spatial resolution

X-ray exam of kidneys, ureters, bladder?

Pyelogram

Group of cancerous diseases of the bone marrow?

Leukemia

Control kVp minor selection compensation is needed due to losses in the

regulation compensation circuits

A twelve-pulse kVp waveform on a 60 Hz x-ray system utilizes a

full wave rectification of delta wye secondaries

If time is reduced to 25 ms, what mA should be used for the same mAs?

1,200