Measurement and Density Quiz

____ graduates are usually dual-scale, that is, calibrated in both metric and apothecary units of volume.

• A. Cylindric

• B. Conical

• Both a and b

• None pf the above

Which instruments are commonly used for measuring volume?

• Micropipets and burettes

• Cylindric and conical graduates

• Calibrated syringe and pipette

• All of the above

The narrower the bore or chamber, the lesser the error in reading the meniscus and the more accurate the measurement

• TRUE

• FALSE

What is the sensitivity requirement of a balance?

• The load that will cause a change of one division on the index plate

• The smallest measurable weight on the balance

• The maximum weight the balance can handle

• The weight of the substance being measured

What is the aliquot method of weighing?

• Weighing a larger-than-needed portion of the substance

• Weighing a small quantity of the substance

• Weighing the entire substance

• Weighing multiple substances together

___ balance that has high precision and has greater accuracy than a Class A prescription balance to weigh very small quantities

• Torbal Torsion Balance

• Ohaus Electronic Balance

• Electronic Analytical

• All of the above

What is the formula for density?

• Mass / Volume

• Volume / Mass

• Weight / Volume

• Volume / Weight

What does a specific gravity less than 1 indicate?

• The substance is lighter than water

• The substance is heavier than water

• The substance has the same weight as water

• The substance has no weight

What does a specific gravity greater than 1 indicate?

• The substance is lighter than water

• The substance is heavier than water

• The substance has the same weight as water

• The substance has no weight

What is the specific gravity of a substance?

• Weight of substance / Weight of equal volume of water

• Weight of substance / Volume of substance

• Mass of substance / Weight of equal volume of water

• Mass of substance / Volume of substance