Exam 29: Troubleshooting and Typical Operating Conditions for Commercial Refrigeration

The process of ice making usually occurs in which temperature range?

Low density vapors entering the compressor will mean low refrigerant flow through the compressor.

In a 2-ton capillary tube system, the unit does not develop full capacity. Head pressure is high, suction pressure is high, and there is no superheat. What is the problem?

The water quality required to maintain the water level in the sump is called ____________________.

In a wastewater system, the water entering the condenser is 85°F and the water leaving the condenser is 90°F. Which of the following statements is a logical explanation for the above conditions?

With the entering air to the condenser above 70 ° F, the temperature difference between the outdoor air and the condensing temperature on standard units will be ____.

The refrigerated cabinet temperature of a high-temperature refrigeration unit ranges from ____.

In a wastewater system, the water entering the condenser is 85°F and the water leaving the condenser is 105°F. Which of the following statements is a logical explanation for the above conditions?

In a 2-ton TX valve system, the unit does not develop full capacity. Head pressure is high, suction pressure is slightly above normal, superheat is normal, and subcooling is above normal. What is the problem?

A sight glass that is full of vapor or liquid may look the same.

In a water-cooled condensing unit/cooling tower combination, the temperature difference of the water through the condenser will be approximately ____.

Bubbles in the sight glass always indicate refrigerant shortage.

If the evaporator and compressor are starved of refrigerant, the condenser will also be starved.

Condensing units located outside that are required to operate year-round must have ____.