What is the potential drop between the two electrodes

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Reference no: EM13230145

1. Which of the following three physiological parameters might be measured in an ICU or CCU along with ECG, heart rate, respiratory rate, and arterial pressure?

ICP, pH, acoustic impedance

EEG, venous pressure, cardiac output

EMG, uterine contractions, urine output

BUN, creatine, myoglobin

2. Silver and zinc electrodes are immersed in an electrolyte solution. Given that the half-cell potentials for zinc and silver are -0.763 V and +0.799 V, respectively, what is the potential drop between these two electrodes?

0.036 V

1.562 V

-1.562 V

-0.036 V

3. Which is the term used to describe the distensibility of the chest and/or lung expressed as the ratio of volume change to pressure change?

Viscosity

Elastance

Surface tension

Compliance

4. In error, a patient is infused with a large volume of a solution that causes lysis of his red blood cells. The solution was most likely

isotonic NaCL.

isotonic mannitol.

hypertonic mannitol.

hypotonic urea.

5. In respiratory therapy equipment, which device creates suspended fine particles or droplets in the administered gas?

A gas regulator

A flowmeter

A humidifier

A nebulizer

6. An acute decrease in arterial blood pressure elicits which of the following compensatory changes?

Decreased heart rate

Decreased contractility

Decreased mean systemic pressure

Decreased firing rate of the carotid sinus nerve

7. Two metal plates with an area of 4 cm2 and separation distance of 0.01 cm are used to form a capacitance transducer. If the material between the two plates has a dielectric constant of 2.5 and the dielectric constant of free space is 8.85 pF/m, calculate the capacitance of the transducer.

8.85 µF

0.885 F

8.85 nF

8.85 mF

8. For the purpose of an MRI, which element within the body is most important?

Oxygen

Hydrogen

Carbon

Calcium

9. An RTD transducer

is built from semiconducting materials.

has a relatively linear temperature-resistance graph.

is smaller than a thermistor in size.

cannot be used when accurate measurements are required.

10. A thermocouple measures temperature by converting thermal energy to electrical energy. If a thermocouple produces 25 mV and 750 µA, how much heat has been converted to energy?

3.0 µW

18.8 µW

30 mW

33 mW

11. In selecting a display for a portable medical instrument, power consumption is important. Which of the following display technologies has the least power consumption?

CRT

LED

TRP

LCD

12. Permanent storage of measurements in a medical device utilizes which type of memory?

DRAM

SRAM

Flash RAM

RDRAM

13. To avoid signal corruption, a data acquisition system should include which of the following?

A low-pass filter

A bandpass filter

A high-pass filter

A notched filter

14. Which of the following is the government agency concerned with the design and manufacturing of safe medical devices?

FDA

AAMI

JACHO

NFPA

15. Microshock is:

a low value of current (microamps), which passes arm to arm through the body by skin contact with a voltage source.

a low value of current (microamps), which passes directly through the heart via a needle or catheter in an artery or vein.

a high value of current (milliamps), which passes arm to arm through the body by skin contact with a voltage source.

a high value of current (milliamps), which passes directly through the heart via a needle or catheter in an artery or vein.

16. The National Electrical Code (NEC) Article 517.15 for Health Care Facilities specifies that the maximum potential between any two exposed conductive surfaces in the vicinity of a patient is ______ for normal device operation in general care areas.

40 mV

50 mV

400 mV

500 m

Reference no: EM13230145

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