1. Which of the following about ground loops is not true? A. Happen to patients

ID: 2082241 • Letter: 1

Question

1. Which of the following about ground loops is not true?

A. Happen to patients having more than one pieces of devices connected.

B. The ground electrodes are connected to different power socket.

C. Ground loop forms when the grounds have different voltage potential, which cause a current flowing from one ground electrode to the other one.

D. Ground loop is desired to increase patient safety.

2. Increased airway resistance in obstructive lung disease could be caused by the following reasons except?

A. Inside the airway retained secretions

B. In the wall swelling or neoplasm

C. Outside the wall neoplasm

D. Reduced compliance of the lung

3. Which of the following is not true?

A. Infrared spectroscopy can be used to measure gas concentration since most gases absorb infrared light at distant wavelengths

B. Infrared spectroscopy ionizes the gas to plasma, thus emit light

C. Beer’s law is used to calculate the concentration of specific gases

D. Spectroscopy can use transmission principle or photoacoustic principle

4. Body movement during biopotential measurement mostly affect:

A. Distribution of charge of the double layer

B. Electrolyte resistance

C. Lead wire

D. Electrode reduction-oxidation reaction

2. Increased airway resistance in obstructive lung disease could be caused by the following reasons except?

Answer:In the wall swelling or neoplasm

3. Which of the following is not true?

Answer: Infrared spectroscopy ionizes the gas to plasma, thus emit light

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