HVAC 608 3rd Set

Ozone depletion in the stratosphere is what type of problem?

• U.S. problem

• North American problem

• Arctic problem

• Global problem

The ability of a substance to destroy ozone in the stratosphere is referred to as __________.

• GWP (global warming potential)

• ODP (ozone depletion potential)

• GOP (global ozone potential)

• GOE (global ozone extinction)

The stratospheric ozone layer protects us from __________________.

• infrared radiation from space

• alpha radiation from the sun

• ultraviolet radiation from the sun

• gamma rays

______________ the speed of evacuation.

• The size of the equipment being evacuated and the size of the vacuum pump both affect

• The ambient temperature affects

• The moisture in the system affects

• All of the above

Over-evacuation of a system can __________________.

• cause service hoses to collapse

• damage a micron gauge

• destroy a vacuum pump

• never occur; you can never pull too many impurities from a system

A system is evacuated __________________.

• to find leaks

• to verify it is leak free

• to dehydrate the system

• all of the above

Dehydrating means to remove ______________.

• water and water vapor

• acid and acid vapor

• all impurities from a system

• all of the above

EPA regulations only allow recovered or recycled refrigerant to be _______.

• charged into the same or another appliance owned by the same person

• sold for use directly in small appliances

• reclaimed

• incinerated

__________ the speed of dehydration.

• The size of the equipment being evacuated and the size of the vacuum pump both affect

• The ambient temperature affects

• The moisture in the system affects

• all of the above

When measuring a vacuum of the system, the vacuum gauge should be connected _______.

• at the vacuum pump inlet

• to the system as far as possible away from the vacuum pump

• to the center hose of the manifold gauge

• at the vacuum pump outlet