CHILLER SYSTEM - Practice Mode

1) What is the cause of bubbles in liquid line sight glass after gas charging the system?

Excess refrigerant Shortage of refrigerant Oil bubbles in sight glass Nitrogen trapped in system

Correct Answer: Shortage of refrigerant

2) What is the effect if the refrigeration system is started before chilled water pump?

No cooling Water warms in chillier Water freezes in chillier Excess of heat transfer

Correct Answer: Water freezes in chillier

3) Which control trips if the expansion valve inlet strainer is blocked in chiller AC plant?

Thermostat control Low pressure cut out Oil pressure cut out High pressure cut out

Correct Answer: Low pressure cut out

4) What is the effect of improper alignment of machines while installing a central AC plant?

Silent operation Excess of wear and tear Less noise and vibration Less power consumption

Correct Answer: Excess of wear and tear

5) What is the remedy for no lubrication even if the sight glass shows proper oil level?

Replace oil pump Add oil to crankcase Replace oil pressure gauge Replace oil pressure cut out

Correct Answer: Replace oil pump

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