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MIDTERM UNITS 1-8 > UNIT 2 > Flashcards

UNIT 2 Flashcards

1
Q

Volume that each pound of gas occupies. Unit of measure is.ft3/lb.

A

Specific volume

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2
Q

Matter that exerts all of its force downward

A

Solid

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3
Q

Energy can be neither created nor destroyed, but can be converted from one form to another

A

The Law of conversion of energy

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4
Q

Force that matter applies to a supporting surface when it is at rest

A

Weight

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5
Q

Total pressure of a confined mixture of non-reacting (inert) Gases is the sum of the pressures of each of the gases in the mixture

A

Dalton’s law

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6
Q

Converting electron flow to usable energy

A

Magnetism

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7
Q

Rate of doing work expressed as ft-lb/min

A

Horsepower

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8
Q

Natural gas oil and coal are examples of this

A

Fossil fuel

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9
Q

The capacity for doing work

A

Energy

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10
Q

A force moving an object expressed as:
Lbs x ft= ft-lb

A

Work

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11
Q

True or false
A substance that has a specific gravity greater than the specific gravity of water (1) will sink in water

A

True

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12
Q

True or false
The correct unit of measurement for specific volume is lb/ft3

A

False

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13
Q

True or false
Tare weight (TW) is the weight of a cylinder when it is filled with water

A

False

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14
Q

True or false
The weight of a substance is the product of the substances, mass and the force of gravity, pulling down on it

A

True

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15
Q

Charles law can be expressed as
V1/T1=V2/T2

A

True

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16
Q

The density of a substance multiplied by its specific volume will always see a product of 1

A

True

17
Q

ft3/lb=

A

Specific volume

18
Q

3413 BTUs/hr

A

1KW

19
Q

746 watts

A

1 hp (horsepower)

20
Q

Lb/ft3=

A

Density

21
Q

Unitless number

A

Specific gravity

22
Q

Ft-lb=

A

Work

23
Q

The specific volume of dry air is 13.33 ft.³/lb. what is its density?

A

1/13.33=0.07 lb/ft3

24
Q

Specific volume is the term used to…

A

Indicate the amount of space that the weight of gas will occupy

25
Q

How many BTUs are there in 12 kW of electrical power?

A

3413×12 = 40,956

26
Q

When discarding disposable cylinders of CFC’s, HCFCs, HFC’s or HFO’s….

A

All of the above

27
Q

True or false
Only a few ounces of refrigerant mixed with nitrogen is considered a leak Trace gas and may be released without recovery

A

True

28
Q

When calculating cylinder capacity at what temperature is the value of the liquid density of the refrigerant used?

A

130°F

29
Q

True or false
R-744 carbon dioxide CO2 generally does not need to be recovered

A

True

30
Q

Records of leak inspections, initial leak verification, and follow up verification test must be kept on file for three years. Who maintains those records?

A

The owner/operator of the equipment

31
Q

True or false
The weight of a substance is the product of the substances, mass and the force of gravity, pulling down on it

A

True

MIDTERM UNITS 1-8 (8 decks)

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