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WorksheetsBalances Review
Total questions: 10
Worksheet time: 7mins
Analytical balances weigh substances with a high degree of accuracy.
True
False
Match the following definitions:
Zeroing
Scale is at zero mark before pan added
Taring
Scale is at zero mark after pan added
True
balance at rest and scale reads zero
Two pans of equal mass are suspended from ends of a lever or beam and calibrated weights are placed on one pan to counterbalance an object of unknown mass on the other pan. This is known as a:
Mechanical Analytical Balance
Electronic Analytical Balance
Top Loading Balance
Triple Beam Balance
A top loading balance is usually ______ and ______.
Electronic, self-balancing
Mechanical, manual-balancing
A balance that has moveable weights that lock into accurately milled notches at each calibration mark to ensure accuracy is known as a:
Mechanical Analytical Balance
Top Loading Balance
Triple Beam Balance
Electronic Analytical
Match the following parts of an analytical balance:
Glass Enclosure
prevents air currents and dust
Balancing Screws
used for leveling the balance
Beam
pans are suspended from this
Knife edges
give sensitivity to the balance
When handling balances:
Hot objects may be weighed directly on the pan
Chemicals may be weighed directly on the pan
50-100g is a safe limit for most balances
Fingerprints don't affect balancing
When using a balance, precision may be sacrificed for speed.
True
False
What kind of balance is this?
Electronic Analytical Balance
Top Loading Balance
Triple Beam Balance
Mechanical Analytical Balance
Corrosive materials should be weighed in a closed container or on a top loading balance.
True
False
