Archives: Quizzes

Test your evacuation knowledge with this short quiz written by Jim Bermann

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1. An evacuation on a 2 ton system should take ___________ minutes

 60

 Impossible to tell

 120

 10

 30

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2. 500 microns is equivalent to

 Running the pump for 30 minutes

 An impossible dream

 1/2mm

 50 Pascals

 1 mm Hg

 .5 mm Hg

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3. A good vacuum pump oil will have a

 Low Vapor Pressure

 High Flash Point

 Hard Time Staying Out of Your Hoses

 Low Viscosity

 High Vapor Pressure

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4. The speed of evacuation is affected most by?

 hose length

 Pump Brand

 Opening and closing the gas ballast

 hose diameter

 vacuum pump size

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5. Vacuum gauge sensors are typically what type of sensors?

 Strain Gauge

 Thermal

 Micron Beam

 Absolute

 Temperature

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6. Exposing a typical vacuum gauge to refrigerant vapor will make the gauge?

 Into a Paperweight

 Fail

 Register Vacuum

 Register No Vacuum

 Creep Up

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7. This system is

 Leaking

 Ready to Receive Refrigerant

 Contains Refrigerant

 Wet

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8. Vacuum rated refrigerant hoses have what design property?

 They do not leak under a vacuum

 They are made by one manufacturer

 They have a lower leak rate than typical hoses

 They require o-ring seals

 They are always black

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9. Vacuum pump oil is highly refined ________ oil

 Mineral

 POE

 Motor

 Synthetic

 PAG

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10. In order to achieve the desired vacuum rate, the pump must be able to overcome the?

 Leak Rate of the Core Tools

 All of the above

 Leak Rate of the Hoses

 Leak Rate of all Mechanical Fittings

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11. This system is

 Contains non-condensable Gasses

 Ready to receive refrigerant

 Leaking

 Wet

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Test your skills to see if you are a refrigeration basics pro… or a parts changer