CLT Laser Equipment Operation & Care 2

Question 1

What does the term 'duty cycle' refer to in pulsed laser therapy devices?

Accepted Answer

The percentage of time the laser is 'on' during a pulse cycle

Answer

Duty cycle is the proportion of time a pulsed laser is in the 'on' state relative to the total pulse period, expressed as a percentage.

Question 2

Which cooling system component requires the most frequent maintenance inspection in a high-power therapeutic laser?

Accepted Answer

The water-cooling reservoir and filter

Answer

The water-cooling reservoir and filter must be inspected frequently because mineral deposits and contamination can reduce cooling efficiency and damage the laser diode.

Question 3

What is the purpose of the interlock system on a therapeutic laser device?

Accepted Answer

To prevent laser emission when the treatment head is not properly attached

Answer

The interlock system is a safety mechanism that disables laser emission when a handpiece or treatment head is disconnected or improperly seated.

Question 4

A CLT notices the laser's actual output power is consistently 15% below the displayed setting. The FIRST corrective step should be:

Accepted Answer

Perform an output power calibration using a calibrated power meter

Answer

Calibration with a traceable power meter should be performed first to confirm and quantify the discrepancy before any component replacement or workaround.

Question 5

What type of optical fiber is most commonly used to deliver therapeutic laser energy to a handpiece?

Accepted Answer

Step-index multimode silica fiber

Answer

Step-index multimode silica fiber is the standard choice for therapeutic laser delivery due to its large core diameter, durability, and efficient energy transmission.

(CLT) Certified Laser Therapist Practice Test

(CLT) Certified Laser Therapist Practice Test

CLT Laser Equipment Operation & Care 2