Lab Safety Quiz Pract.

According to the safety instructions, if you fail to follow any safety rule:

You may be dismissed from the lab

You are excused from wearing goggles in lab:

none of the above

The drench hose:

can be used on chemical spills on a small area of the body or as an eye wash.

The phone located in the lab:

is to be used for calling 911 in case of emergency.

For large chemical spills on the countertop or floor:

use a drench hose.

In the hallway across from the lab entrance, there is:

an intercom with a button and a picture of an emergency on it.

You should prepare for the lab by:

reading the assigned experiment before coming to lab.

If you do not understand the experimental procedure:

ask the instructor.

n the lab each student should:

be on alert, watching for his own safety and the safety of others.

If you are pregnant or have a medical condition:

check with your physician prior to working in lab

Before evacuating the lab, in case of earth quake or other emergency, you will:

turn off gas valves and electrical equipment.

You are permitted to enter the lab if:

the instructor is present.

You may do an unassigned experiment, only:

none of the above.

You can only change the procedure of the experiment if:

none of the above.

In lab you are allowed to eat and drink only:

non of the above.

Store your books and bags:

under your bench.

If you notice unexpected chemical reaction of your experiment:

notify the instructor.

In lab, to avoid bumping into other students, you should:

look behind you before you back up.

Damage or exposed electric cord:

should always be reported to the instructor.

To avoid electric shock when handling plugs and equipment:

your hands must be dry.

The following should be reported to the instructor:

all accidents no matter how minor.

If you feel ill in lab:

tell the instructor.

For your “safety”, before leaving the lab, you must:

wash hands and any other area of skin that has contacted lab equipment of lab benches.

If you accidentally mix the wrong chemicals, you must:

report it to the instructor.

If you come to lab dressed inappropriately, you will be asked to:

leave the lab.

Goggles should be worn:

all the time during lab.

You must wear goggles in the lab because:

they protect your eyes from fumes and odors.

Proper apparel for the lab includes

short fitted clothes.

Proper footwear in lab is:

closed-toe sheos.

For safety, long hair needs to:

be tired back.

If you are instructed to smell a chemical in the lab, you need to:

fan the air above the chemical toward your nose.

If you need to touch or rub your eyes, you must:

wash your hands.

You should always hold containers that have chemicals:

away from your body.

Before using the contents of a bottle, check:

the label on the bottle.

To remove solid chemicals from a bottle:

pour the solid directly into your container.

To remove liquid from a reagent bottle:

pour some liquid directly into your container

An unused/ leftover chemical should be:

disposed of in the designated waste container.

To dispense a required amount of reagent:

take our container to the reagent bench.

Pick up a reagent bottle by holding it:

with you palm over the label.

To dilute a concentrated acid:

add water to the acid.

Store chemicals in:

labeled containers.

Apply labels and markings on the etched part found on beakers and flasks by using:

pencil only.

The fume hood is used for:

procedures that produce smoke of toxic gases.

When working with an experiment under a fume hood:

keep fume hood sash down as far as possible.

Flammable liquids:

can catch fire easily.

Alcohol used in the lab:

is tainted with poison.

Wash bottles should be filled ‘only’ with:

distilled or de-ionized water.

To add water to a reagent used in an experiment:

use distilled or de-ionized water.

To weigh 2 grams of salt in lab:

place salt into a beaker before weighing it on the balance.

If you spill solid chemicals on a balance:

brush off any spills.

After dispersing a chemical from a container:

replace the stopper immediately.

If no specific instructions for disposing of waste chemicals are given, you should dispose of all liquids and solutions into:

the sink with lots of water

You should get under the shower in lab:

if there is a large chemical splash on the body.

If the eyewash or shower is used in lab, the affected area should be irrigated and rinsed with water for at least:

15 minutes.

If you spill a large amount of chemical on the floor:

alert nearby students and call the instructor for instructions about how to clean it up.

A cracked test tube or chipped glassware should:

never be used.

When inserting glass tubing into a rubber stopper, hold the glass tubing:

close to the end near the stopper.

If a ground glass stopper is frozen (stuck) to a bottle:

report it to your instructor.

When you use a thermometer:

lay it on a towel.

To remove stopper or lid from a bottle, pick up the stopper then:

hold it with the hand holding the reagent bottle.

Since you cannot tell from the appearance of a metal or glass that it is still hot, you should test it by:

cautiously bringing the back of your hand close to the hot glass or metal.

To handle hot objects like a beaker or evaporating dish:

use a pair of tongs.

A hot object, like an evaporating dish or crucible. is allowed to cool by placing it on:

wire gauze.

When heating liquid in test tube, the open end of the test tube:

should be pointing at an angle that allows the liquid to splash gently over the hot glass, but not out of the test tube.

To light a Bunsen burner:

you need to position the burner right in front of the gas valve.

You may leve a lighted Bunsen burner unattended only, if:

none of the above.

In case of accident or injury to you or to your classmate:

must be reported immediately to the instructor.S

Small burns from touching hot objects, should be:

placed under running cold water.

If your clothing catches fire:

drop to the floor and roll on the floor to smother the flame.

A small contained fire may be:

smothered by covering it with a cover plate or a watch glass.i

In case of an earthquake:

turn off the gas valve and stay away from falling objects.