LASER IQ-part 2 keys to quizzes- discussion about questions etc

[hakzaw1]

I saw a need to run this thread with discussions on some questions and our own key to the answers and not many give those w/o registering.
so PLZ

ANSWERS IN THIS THREAD -

new quizzes in the the other thread if you find any- Test Laser IQ- I have several more ready to post

here:

http://www.photonlexicon.com/forums/...aser-safety-IQ
++++++++++++++++++++++

I reposted the quiz to may this easier to understand- but once in each thread is plenty IMO.

LaserQuiz #`1 ( out of thousands)

here a pretty good one-- i had to think a bit on 3 or 4- i predict I will have missed 2- 3 or less.

NOTE: In this and some other quizzes they may NOT have the choices marked A-B-C-D so if these are not there just consider A to be th top answer and D the last/bottom one listed.


Newest quiz I am calling it LQ#1 no answers given-w/o registering.

link
http://www.quibblo.com/quiz/ewm2__N/...ty-instruction

*************** 15 Qs use A-B-C or D for your choice- do not post this entire quiz at the Part2 thread unless its not there.
the quiz--

--good luck--
************************************************** ****************************
Which range of the wavelength is commonly called ‘visible light’?

A.400‐700 nm
B.200‐400 nm
C.700‐1000 nm
D.1000‐2000 nm
2
What determines the wavelength output of a laser

excitation mechanism
gain medium
transmissive mirror
high reflectance mirror
3
When viewing a laser beam, which of the following case is the least dangerous ?

direct viewing of primary beam
intrabeam viewing of a specularly reflected (secondary) beam from flat surface
extended viewing of a diffused beam
intrabeam viewing of a specularly reflected (secondary) beam from curved surface
4
What kind of damage can Class 4 laser cause

vision impairment
skin burn
ignite flammables
all of the above
5
Which of the following is not a result of laser induced skin damage

burns
skin carcinogenesis
blistering and aging
D.allergic reaction
6
What is not a safety precaution in a laser laboratory?

work area should be as bright as possible
stray beam should always be aligned to leave the room
laser should not be at eye level
specular reflections should be minimized
7
What is not a necessary precaution for the laser operator?

remove all exposed jewelry from body
always wear protective goggles
do not bend down so that eye level is with the beam
wear ear protection against loud sound
8
What is not true when discussing the different between laser light and incandescent light?

laser is monochromatic
laser is coherent
laser has more energy
laser is unidirectional
9
What is not true about protective goggles?

goggles eliminate the possibility of eye damage
nearly all goggles do a poor job of protection against visible light
goggles must always be worn when working with lasers
goggles should have wavelength and OD specified by manufacturer
10
When working with a laser, you need to turn the warning light on when…

when the laser passes MPE threshold
laser is in pulsing mode
there are no goggles for the specific wavelength
always
11
Which surface is the most dangerous for specular reflection?

curved and shiny
flat and shiny
porous
curved glass surface
12
Which of the following is not a typical hazard associated with laser operation?

electrical hazard
chemical hazard
loud audible hazard
photon discharge hazard
13
When do need to post laser warning signs?

when a laser is present in the lab
when a visiting scholar has brought his own laser
when a laser is temporarily placed in the lab
all of the above
14
When should a laser warning light be turned on?

only when a class 3a or higher laser is used
at all times even when the laser is not in operation
all times when a laser of class 2 or higher is in operation
only when a class 4 laser is used
15
What should you do in the event of an injury by a laser?

seek emergency care immediately
assess whether this injury is severe
determine the problem and fix the laser setup
continue with proper safety equipment and do so cautiously




Laser IQ quiz- Part 2 the answers- how you did and debates on any questions we dont agree on.
My answers.
Quiz#1
1A 2B 3C 4D 5D 6B 7D 8C 9A 10D 11D 12C 13D 14C 15A.

[hakzaw1]

as noted- almost none of these quizzes is geared towards us (laser shows)

so some questions may have different correct answers- IMO if we can grade our own with 99% accuracy who cares about the unclear ones like--
#9

9
What is not true about protective goggles?

A goggles eliminate the possibility of eye damage
B nearly all goggles do a poor job of protection against visible light
C goggles must always be worn when working with lasers
D goggles should have wavelength and OD specified by manufacturer


In a lab they very well be required to waer goggles inside the l laser on OR off- IDKFS

BUt as was related at LSO by Greg M

karl 'laserwiz' got into a bad deal in Arizona over eye ware- So IMO--for all on show crew at least have them on you--

so I choose 'A' second guess B.

[hakzaw1]

Quiz #2

Default
test your laser IQ quiz #2-


? quiz #2

Question Click on the circle next to the best
answer for each question
1. Which of the following is an example of a gas laser?
A. Nd:YAG.
B. CO2.
C. Dimer.
D. Diode.

2. Laser light has which of the following properties?
A. Monochromatic.
B. Highly directional.
C. Coherent.
D. All of the above.

3. Which is more hazardous?
A. Specular reflection.
B. Diffuse reflection.

4. The nominal hazard zone (NHZ) for medical laser is confined to?
A. sterile field.
B. OR suite.
C. Entire OR.
D. Entire hospital.

5. Medical lasers are usually which class of laser?
A. Class 1.
B. Class 2.
C. Class 3a.
D. Class 3b and 4.

6. Which wavelength of light is most likely to cause retinal injury?
A. UV (200 � 400 nm).
B. Visible or IR-A (400 � 1,400 nm).
C. IR-B (1,400 � 3,000 nm).
D. IR-C (3,000 � 10,000 nm).

7. Exposure to a CO2 laser would give someone the following symptom?
A. Burning pain on the cornea or sclera.
B. Bright color flash.
C. After-images.
D. Loss of ability to detect blue or green colors.

8. Post of warning signs is an example of
A. Engineering control.
B. Administrative control.
C. Personnel Protective Equipment (PPE).
D. All of the above.

9. Laser protective eyewear must specify:
A. Optical density.
B. Wavelength.
C. Type of surgical procedure.
D. A and B.
E. All of the above.

10. To avoid inhalation of laser-generated air contaminants, members of the surgical team must wear:
A. Standard surgical masks.
B. High filtration (0.1 micron) masks.
C. NP-95 canisters.
D. Self contained breathing apparatus.

11. The laser foot pedal may be operated by:
A. Anyone on the surgical team.
B. Any laser team member.
C. The scrub nurse.
D. Only the surgeon.

12. Which of the following procedures must be done for fiber optic lasers:
A. Clamp the fiber to secure in the operative site.
B. Test the fiber by firing the laser at the microscope.
C. Examine the fiber for breaks or damage of the distal tip before use.
D. Place the fiber on the drapes when removed from the patient.



my answers and a few guesses
1-B Co2
2-D all
3-A
4- C
5--D??
6-A
7-D
8-B
9-D-- A&B
10-B??
11-D
12-A??

[hakzaw1]

any continued interest in more quizzes??

[Laser Wizardry]

" 15 characters"

[hakzaw1]

..
sorry to hear the details-- worse than I thought--

THANKS Karl for all that great info..

We may ask you to help with the very few 'iffy' questions on these basic quizzes I have been posting. At most there are only a few in question in each quiz(ignoring the ones about medical etc)

Its clear that the LSO is not a one time thing- there will always be new info to find-& learn ---at times you need to 'weed out' the parts not at all for lasershows-
but imo the majority of safety info applies to all. Joining ILDA was on my bucket list- and I must be doing something right as I won a years+ worth at SELEM 2014.

I cant agree more with Karl on the great things ILDA/Patrick are doing. Same for Greg.. great guys.
I will continue to place new quizzes when I find them- but as I wrote--they don't give us the answers.

IIRC I have posted in this thread my answers to all 'those' quizzes-

hoping one of you with more knowledge will 'grade' me.

Unless I do it soonerI may try at SELEM2015 to re-take the exam- but may not be able to stay over to Monday night to re-take the class again.

no worries I am >ready now. I will do some 'arm twisting' of my many Texas friends and get two to carpool and take the class.
hak

*******************

update

Karl's link--

OD @ WavelengthOD 2 @ 400-650
OD 1.5 @ 650-700
Laser TypeArgon
Diode
HeNe
Lens TypeFilter Glass
Frame StyleFitover Spectacle
Transmission13%
CertificationsANSI Z136.1
ANSI Z87
Special FeaturesOver the Rx
Intense UV
Filter Number062C
Alignment Filters (OD MAX at wavelength)515nm OD 2 or less
532nm OD 2 or less
585nm OD 2 or less
595nm OD 2 or less
633nm OD 2 or less
694nm OD 2 or less
Color Gauge

R

Y

G

B
Your Price $325.00

Gotta start showing these ^^^ to the 'kids' at pointerville who whine about spending a WHOLE 20$ when They can find them for $4.