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ME LAB 1 > Excercise 1 > Flashcards

Excercise 1 Flashcards

1
Q

What is a common use for a pipette?

A

Measuring liquid volume with precision

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2
Q

What is the definition of volume?

A

The amount of three-dimensional space an object occupies

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3
Q

What is the volume of a cube with each side measuring 2 meters?

A

8 m³

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4
Q

In the English system, atmospheric pressure is often measured in

A

Inches mercury (inHg)

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5
Q

What is the main function of a volumetric flask?

A

To prepare solutions of exact concentration

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6
Q

Which unit is commonly used for measuring liquid volume in
the SI system?

A

Liter

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7
Q

What is the metric unit for pressure?

A

Kilopascal (kPa)

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8
Q

What type of volume measurement is generally understood for a container?

A

Capacity

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9
Q

What method can be used to determine the volume of an
irregular solid?

A

Fluid displacement

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10
Q

Why is volume measurement important?

A

It is essential for chemistry, cooking, and construction

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11
Q

In cooking, which unit is often used to measure liquid ingredients?

A

Teaspoon

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12
Q

What is the conversion factor from feet to meters (1959 standard)?

A

1 foot = 0.3048 meters

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13
Q

What type of sensor is used for non-contact temperature measurement?

A

Infrared Sensor

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14
Q

What is a characteristic feature of glass pipettes?

A

They can be non-scaled or scaled

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15
Q

In the U.S. customary system, which of the following is a common unit of volume?

A

Pint

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16
Q

What does a thermocouple produce as a result of the thermoelectric effect?

A

Temperature-dependent voltage

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17
Q

Which temperature measuring device is widely used in industrial processes to protect sensors?

A

Thermowell

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18
Q

What distinguishes “air displacement” pipettors from other
types?

A

They use an air cushion between the piston and liquid.

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19
Q

How is mass measured differently in the English and metric systems? What are the base units for mass in each system?

A

Mass is measured in pounds in the English system and
kilograms in the metric system

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20
Q

What is the basic unit for area in the metric system?

A

Square meter

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21
Q

Which unit measures large volumes of water in the English system?

A

Acre-foot

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22
Q

Which of the following is not a commonly used temperature
scale?

A

Joule

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23
Q

What led to the standardization of volume units?

A

Increased trade and commerce

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24
Q

Which of the following is a derived unit of volume in the SI system?

A

Cubic centimeter

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25
Which of the following devices has high accuracy and is used for measuring volumes from 1 to 100 mL?
Burette
26
What is the primary reason for calibrating pipettors regularly?
To ensure accuracy and precision of measurements
27
What is the freezing point of water in Fahrenheit?
-40°C
28
What does accuracy refer to?
What does accuracy refer to?
29
Which unit belongs to the English system for length?
One-hundredth of a kilometer
30
Which system is used almost universally for measurements?
English system
31
Which temperature measurement device uses electrical resistance that changes with temperature variations?
Electrical Resistance Thermometer
32
What is the base unit for measuring angular distance in the metric system?
Radian
33
What is the primary function of a barometer?
Measure atmospheric pressure
34
What is the primary difference between mass and weight?
Mass remains constant regardless of location, while weight can change based on gravitational force.
35
At what temperature are volumetric vessels typically calibrated?
20 °C
36
Which type of barometer uses a column of mercury to measure pressure?
Digital barometer
37
What happens to the volume of water when its temperature increases from 10 °C to 80 °C?
t increases due to thermal expansion.
38
Which thermometer operates using a handheld device filled with both liquid and vapor of the same liquid?
Vapour Pressure Thermometer
39
What type of vessel is typically calibrated for 20 °C?
Volumetric flask
40
Which device is primarily used for titrations
Burette
41
What is the formula for calculating the volume of a cylinder?
πr²h
42
Which temperature measuring device consists of two metals bonded together that bend when the temperature changes?
Bimetallic Thermometer
43
Which unit is used to express very large volumes, such as in meteorology?
Cubic kilometer
44
What term describes the property being measured?
Measurand
45
What instrument is commonly used to measure liquid volume?
Graduated cylinder
46
What is the unit of mass in the metric system?
Kilogram
47
How should the volume be read on a burette?
Twice: starting and ending positions
48
What principle is the Pressure Thermometer based on?
Liquid expansion due to pressure increase
49
What volume range do microsyringes typically dispense?
0.1–1000 μL
50
What is the main purpose of temperature measurement?
To determine the degree of hotness or coldness of an object
51
What is the standard atmosphere (atm) a measure of?
Pressure
52
Which of the following is a historical unit of volume?
Gallon
53
What is the main use of a piston dispenser?
For repetitive dispensing of the same volume
54
What is the SI base unit for length?
Meter
55
What is the purpose of a microsyringe?
Dispensing small volumes (0.1–1000 μL)
56
Why should a liquid never be aspired by mouth when using a pipette?
For security reasons.
57
Which of the following is a metric unit for volume?
Cubic meter
58
In the Celsius scale, at what temperature does water boil under standard conditions?
100°C
59
Which of the following is not a method of measuring volume?
Using a ruler
60
does a cubic What meter measure?
Volume
61
What is the term for the maximum error expected in a value?
Tolerance
62
Which of the following statements is true regarding mass and weight?
Weight is the product of mass and acceleration due to gravity
63
Repeatability refers to:
Measurements over time
64
What is a key reason for calibrating a pressure gauge regularly?
To maintain measurement accuracy
65
What is the purpose of a scale ruler? *
To convert between scaled drawings and actual dimensions.
66
What is the SI derived unit for measuring volume?
Cubic metre
67
Which of the following units is commonly used in the U.S. customary system?
Yard
68
Which is larger than a meter?
Kilometer
69
What is the freezing point of water in Celsius?
0°C
70
What is the volume of a sphere with a radius of 3 meters?
27π m³
71
Reproducibility refers to:
Consistent measurements with the same method
72
Which tool is used to measure the volume of irregular objects?
Graduated cylinder
73
What is the unit of mass in the English system?
Pound
74
The Fahrenheit and Celsius scales meet at
-40°
75
What is precision a description of?
Random errors
76
Which is not a type of measurement error?
Instrument offset
77
What is the basic unit of volume in the International System (SI)?
Cubic meter
78
What is the main disadvantage of the Constant Volume Thermometer?
The pressure change is too small for a given temperature
79
Which of the following statements is true?
Mass is a measure of the amount of matter in an object, while weight is the force exerted by gravity on that mass.
80
What is the purpose of a measuring cup?
To measure volume
81
What is the radian equivalent of 360 degrees?
2 radians
82
Which thermometer measures the vapor pressure of a liquid?
Vapour pressure thermometer
83
Which of the following is not a reason for recalibration?
Instrument size
84
What is the primary purpose of calibration in measurement systems?
To ensure the instrument's measurements align with known standards
85

ME LAB 1 (6 decks)

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