EPA Section 608 Exam: Type III

Where would you place a leak detector probe to check gas leaks into the water box with water removed?

• At the rupture disc seal

• Around the vent valve

• Around a test plug

• In the drain valve opening

Answer explanation

Refer to page 24 in your EPA Section 608 Preparatory Manual.

Which of the following indicates air in a low-pressured system?

• High head pressure

• High liquid levell

• Low head pressure

• Low suction pressure

Answer explanation

Refer to page 24 in the EPA Section Preparatory Manual.

A hydrostatic tube will:

• Determine if a tube leaks

• Blow all water out of tubes

• Remove water from a machine

• Vent refrigerant to the atmosphere

Answer explanation

Review page 24 in your EPA Section 608 Preparatory Manual.

When testing a low-pressure centrifugal chiller with nitrogen, what is the maximum test pressure?

• 0 psig

• 10 psig

• 25 psig

• 50 psig

Answer explanation

Review page 24 in your EPA Section 608 Preparatory Manual.

A rupture disc on a recovery vessel for low-pressure refrigerants relieves at:

• 5 psig

• 10 psig

• 15 psig

• 20 psig

Answer explanation

Review page 26 in your EPA Section 608 Preparatory Manual.

On low-pressure chillers, moisture most frequently enters the refrigerant system through:

• Air leaks in the rupture disc assembly

• Tube leaks in the evaporator

• Leaks from areas with gaskets or fittings

• Leaks from the charging service valve.

Answer explanation

Review page 24 in your EPA Section 608 Preparatory Manual.

Excessive running of a purge system on a low-pressure chiller generally indicates what condition?

• Faulty air sensors

• Leaking system

• Ambient temperature is too high

• Low purge unit efficiency

Answer explanation

Review page 24 in your EPA Section 608 Preparatory Manual.

Pressure relief valves can only be installed:

• in a series

• in parallel

• vertically

• horizontally

Answer explanation

Review page 27 in your EPA Section 608 Preparatory Manual.

Where should the discharge from a rupture disc be piped for venting?

• To the duct system

• Outdoors

• To the evaporator

• Inside the machinery room

Answer explanation

Review page 27 in your EPA Section 608 Preparatory Manual.

A company uses a chiller that diverts 55% of its cooling capacity to one of its manufacturing lines and 45% of its cooling capacity to air condition the office spaces. Which leak rate category would this chiller be in?

• Industrial process refrigeration

• Ice making refrigeration

• Commercial refrigeration

• Comfort colling

Answer explanation

Review page 25 in your EPA Section 608 Preparatory Manual.