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Test Your Knowledge

Questions 1-6. Use photograph to answer each question.

Value: 10

Match the items.

1. Sash a. Movable panels located on the back wall of the hood that are slots in which exhausted air passes.

2. Alarms, sensors, controls, and gauges b. Tapered, vertical sills or side posts at the front of the hood that promote smooth air flow into the hood.

3. Air Foil c. A movable glass panel that covers the face area of a fume hood.

4. Air Jambs d. Provide laboratory personnel with a constant readings of fume hood performance.

5. Baffles e. Creates smooth air flow, minimizing turbulence of the air entering the hood and is located at the front of the hood beneath the sash.

Value: 1

In the photograph above, is the laboratory worker observing safe operating procedures in her experiment? If so what mistakes can you find?

a. Yes, she is following safe working procedures by using PPE, long pants, lab coat and closed toed shoes. The hood is being used properly. (i.e. chemical storage)

b. Yes, all safety procedures and protocols are being followed. She is wearing proper PPE and the hood is being used properly. (i.e. chemical storage)

c. No. The sash appears to be at an unsafe height for hood operation. Sash height should be a maximum of 24".

d. No. The sash appears to be at an unsafe height for hood operation. Sash height should be a maximum of 18".

Value: 1

A biological safety cabinet can be used the same as a chemical fume hood.

True

False

Value: 1

Chemical fume hoods are inspected on an annual basis to meet NFPA 72 standards.

True

False

Value: 1

FInd the statement that is true.

a. Chemical fume hoods can be used to store and evaporate nearly empty flammable solvent bottles and rags.

b. Chemical fume hoods are for equipment and chemical storage.

c. Chemical fume hoods are ventilation devices that capture chemical vapors and recirculate the air through the building.

d. Chemical fume hoods are ventilation devices that capture chemical vapors and ventilate them outside the building.

e. None of the above.

Value: 1

Select the statement that is false.

a. Substitute toxic chemicals with less hazardous materials whenever possible.

b. The location of the fume hood affects its efficiency and should be located in an area of minimal traffic.

c. Always wear appropriate PPE while working in hood.

d. Perform all work six inches inside the hood.

e. None of these are false.

Value: 1

When should the hood sash remain open?

a. At all times except when you are working on a process or project in the hood.

b. Overnight and weekends.

c. When chemicals are being stored in it.

d. When you are installing an electrical powerstrip for your experiment inside the hood.

Value: 1

Electrical powerstrips are allowed to be installed inside the hood.

True

False

Value: 1

Chemical Laboratory Fume Hood is a type of protective barrier that is used in laboratories to minimize the risks of hazardous and toxic exposures to workers.

True

False

Value: 1

Why do you need to keep laboratory doors and windows closed?

a. To keep the Fire Marshal happy.

b. Supply and exhaust air flow should not be in proper proportion to establish a positive pressure differential between the lab and the outside corridor.

c. Supply and exhaust air flow should be in proper proportion to establish a negative pressure differential between the lab and the outside corridor.

d. Keep the other laboratory groups down the hall from smelling the pizza party going on in your lab.

e. Both A and C.

Value: 1

Which of the following is true?

a. Electrical powerstrips are allowed if they are outside the hood and power cords are run underneath the air foil (sill).

b. You can override a sash stop.

c. You can store equipment for an entire semester in a hood.

d. You can work with the hood sash all the way open as long as you have your safety glasses on.

e. You can completely disable a hood monitor alarm that will not stop while working in the hood.

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