chillers

The two main types of chiller systems are? (select all that apply)

• compression

• reciprocating

• absorbtion

• liquid compression

Chiller barrels move refrigerant and water through them in _______ _______ to maximize their heat exchange.

• opposite directions
• same directions
• random directions
• circular motion

The two main types of chiller systems are? (select all that apply)

• compression

• reciprocating

• absorbtion

• liquid compression

The four common compressors for a chiller are...?

• Reciprocating, Screw, Centrifugal, Scroll
• Piston, Turbine, Centrifugal, Scroll
• Reciprocating, Screw, Turbine, Scroll
• Piston, Screw, Centrifugal, Scroll

What is considered to be the "secondary refrigerant" in a chiller system?

• Compressor
• Condenser
• Cooling Water
• Evaporator

What absorbs heat from a building using a chiller system?

• Air conditioning unit
• Refrigerator
• Cool water

• Heater

What can prevent a proper heat exchange in a chiller barrel?

• Lack of maintenance
• Too much sunlight
• Incorrect installation
• Excessive use

A high pressure chiller has a history of shutting down on low evaporator temperature alarm and the history shows multiple trips for low super heat and some flow alarm lock outs.

What would you suspect of being the problem?

• Condenser fan motors staying on

• low water flow due to a clogged strainer or worn pump impeller

• excess condenser water flow

• faulty expansion valve

On a chiller with a high side float what will happen if the system is over charged?

• The chliied water barrel will have high superheat and high approach temperature

• The chilled water barrel will have low super heat and low approach temperature

• The condenser water barrel will have high sub cooling and low approach temperature.

• The condenser barrel will have low sub cooling and low approach temperature.

You are looking at a low pressure chiller and the chiller condenser barrel approach temperature has gradually increased to 9 degrees over a time period of 4 months on a 3 pass evaporator the likely cause is?

• The cooling tower fan is not running up to speed.

• The sump on the tower needs cleaning.

• The chiller condenser barrel has built up with contaminants and needs cleaned.

• The condenser water pump is running too slow causing an increased approach.