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PROPER USE OF LABORATORY APPARATUS AND EQUIPMENT

Total questions: 15

Worksheet time: 5mins

Name
Class
Date
1.

What are the two important properties of microscope?

a)

illumination

b)

magnification

c)

resolution

d)

disinfection

2.

Which best defines the compound microscope compared to dissecting microscope?

a)

gives three dimensional view

b)

has greater magnification

c)

specimen can be manipulated

d)

thick specimen can be observed

3.

10x, 40x, 100x, 200x: Which provides a better image of the object?

a)

10x

b)

40x

c)

100x

d)

200x

4.

What is measured by a triple beam balance?

a)

density

b)

mass

c)

volume

d)

weight

5.

What is the other term for weights on the triple beam balance?

a)

beam

b)

pointer

c)

pan

d)

rider

6.

Before using the triple beam balance, what should one do if all the riders are at the left zero mark but the pointer does not point to zero?

a)

Calibrate using the knob.

b)

Get the reading.

c)

Move the middle slider.

d)

Place the object on the pan.

7.

Which is the second step in using the pipette?

a)

Detach the bulb.

b)

Hold the pipette with the fingers except the index finger.

c)

Immerse the tip on the container.

d)

Insert the pipette.

8.

In using the transfer pipette, what will you do with the bulb to allow the liquid to go up?

a)

cover

b)

insert

c)

release

d)

squeeze

9.

To dispense liquid from a transfer pipette, what should be done with the bulb?

a)

cover

b)

insert

c)

release

d)

squeeze

10.

If not held by the hand, where should the burette be secured DURING an experiment?

a)

iron stand

b)

test tube rack

c)

table

d)

tray

11.

If you have a 25 ml burette that is full of liquid, what will the reading be?

a)

0.01 mL

b)

1.0 mL

c)

5.0 mL

d)

25.0 mL

12.

When reading a burette, where should you look at to determine the level of the water?

a)

bottom of the burette

b)

highest part of the curved surface of the water

c)

lowest part of the curved surface of the water

d)

top of the burette

13.

Which two materials can be autoclaved?

a)

acids

b)

flammable materials

c)

stainless steel pans

d)

glasswares

14.

Which among pressure, steam, time, and volume is the main responsible for sterilizing objects using an autoclave?

a)

pressure

b)

steam

c)

time

d)

volume

15.

Which specific part of the bacteria is killed by steam in an autoclave?

a)

cell membrane

b)

cell wall

c)

mitochondria

d)

nucleus