CIRO System Operations & Maintenance 2

Question 1

What causes high discharge pressure in a compressor?

Accepted Answer

Dirty condensers, non-condensable gases, excessive refrigerant charge, high ambient temperature, or restricted condenser airflow

Answer

The system is working perfectly

Answer

Low refrigerant charge

Answer

Underloaded evaporators

Question 2

What causes low suction pressure in a compressor?

Accepted Answer

Low refrigerant charge, restricted liquid line, dirty evaporator, low airflow across evaporator, or a stuck expansion valve

Answer

Excess refrigerant in the system

Answer

High ambient temperature

Answer

The compressor is too small

Question 3

What is the purpose of a vibration isolation system for compressors?

Accepted Answer

To prevent compressor vibration from transmitting to the building structure, piping, and equipment, reducing noise and preventing fatigue failures

Answer

To increase compressor speed

Answer

To improve refrigerant flow

Answer

To reduce electrical consumption

Question 4

What is a Management of Change (MOC) procedure?

Accepted Answer

A systematic process for evaluating and documenting any modifications to equipment, procedures, or materials before implementation to prevent introducing new hazards

Answer

A procedure for changing employee shifts

Answer

A method for changing refrigerant types

Answer

A process for updating the company logo

Question 5

What is a Mechanical Integrity (MI) program?

Accepted Answer

A systematic program of inspections, testing, and maintenance to ensure that process equipment operates safely and reliably

Answer

A software for tracking equipment warranties

Answer

A program for replacing all equipment annually

Answer

An exercise program for maintenance workers

Question 6

What records must an industrial refrigeration operator maintain?

Accepted Answer

Operating logs, maintenance records, inspection reports, PSM/RMP documentation, training records, and incident reports

Answer

Only payroll records

Answer

No records are required for operators

Answer

Only annual inspection reports