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Refrigeration Level 2 > Week 1 - Level 1 Review > Flashcards

Week 1 - Level 1 Review Flashcards

1
Q

How many pounds (lbs) in a US gallon?

A

8.34 lbs

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2
Q

What is the sensible heat of air formula?

A

BTU = 1.08 * CFM * deltaT

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3
Q

What is the latent heat of vaporization of water?

A

970 btu/lb

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4
Q

How many Watts is 1 HP?

A

746 Watts

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5
Q

How many btu/hr is 1 HP?

A

42.42 btu/hr

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6
Q

How many ft-lbs/min is 1 horsepower?

A

33,000 ft-lbs/min

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7
Q

How many ft-lbs is 1 BTU?

A

778 ft-lbs

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8
Q

How many feet in a meter?

A

3.28 feet

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9
Q

How much does 1 cubic foot of water weigh?

A

62.4 lbs

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10
Q

How much does 1 cubic foot of air weigh?

A

0.074 lbs

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11
Q

How much is 1 (US) ton?

A

2000 lbs

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12
Q

What is atmospheric pressure in psia?

A

14.696 psia

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13
Q

What is atmospheric pressure in “Hg (inches of mercury)?

A

29.921

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14
Q

What is atmospheric pressure in kPa?

A

101.325 kPa

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15
Q

How many microns is atmospheric pressure?

A

760,000 microns

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16
Q

What is specific gravity?

A

The ratio of the mass of a certain volume of liquid or gas compared to the mass of an equal volume of water (liquid) or air (gas).

17
Q

What is measurement is an absolute scale and corresponds with Fahrenheit? How many units are they offset?

A

Rankine and 460

18
Q

What is measurement is an absolute scale and corresponds with Celsius? How many units are they offset?

A

Kelvin and 273

19
Q

What is the formula for converting atmospheric pressures?

A

Convert to x reference number
Convert From

20
Q

A substance that is a chemical combination of 2 or more elements is called a ____________

A

Compound

21
Q

What are the 3 parts of an atom?

A
  1. Proton
  2. Neutron
  3. Electron
22
Q

What is a substance made of only 1 type of atom called?

A

Element

23
Q

What is the smallest particle of a compound that retains the identity of the compound called?

A

Molicule

24
Q

What is the force that binds molecules together?

A

Molecular Cohesion

25
Q

What is the formula for determining the amount of leverage needed?

A

F1 D1 = F2 D2

Where
F = Force
D = Distance

26
Q

What is the formula for calculating pressure?

A

Pressure = Force / Area

27
Q

What is adiabatic compression?

A

The compressing of a gas without gaining heat from or losing heat to its surroundings.

28
Q

What is Pascal’s Law?

A

Force in gas is equal in all directions.

29
Q

What is Refrigeration?

A

The achievement of a temperature below that of the immediate surroundings.

Refrigeration Level 2 (1 decks)

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