How Do I Get My Contractors License | C-38 Refrigeration Contractor

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C38 – Refrigeration Contractor

A refrigeration contractor constructs, fabricates, erects, installs, maintains, services and repairs refrigerators, refrigerated rooms, and insulated refrigerated spaces, temperature insulation, air-conditioning units, ducts, blowers, registers, humidity and thermostatic controls for the control of air, liquid, and/or gas temperatures below fifty degrees Fahrenheit (50 ), or ten degrees Celsius (10 ).

The Refrigeration (C-38) Examination is divided into five major sections. These sections are:

1. Job Preparation (11%)

Plan/schematics
Types of refrigeration systems

2. Installation (23%)

Critical path requirements
Rough installation
System start up and testing

3. Maintenance (18%)

Inspections and documentation
Preventative maintenance

4. Troubleshooting/Repair (30%)

Common refrigeration system problems
Troubleshooting techniques/diagnosis
System repair

5. Safety (18%)

Chemical hazards
Working in elevated areas
Worker safety/training
Electrical hazards

*Percentages are approximate*

Sample Questions

The following questions are typical of the types of items that are on the examination. The correct answer is highlighted.

1. What is the function of a vacuum pump?

a. Charge the unit.

b. Add oil to the compressors.

c. Remove oil from the compressors.

d. Remove noncondensible gases from the system.

2. What are the symptoms of bad valves in a compressor?

a. short cycling

b. long run cycle

c. high suction and low head pressure

d. low suction and high head pressure

3. All of the following are methods of heat transfer EXCEPT:

a. conduction

b. compression

c. convection

d. radiation

*All questions are written and reviewed by licensed contractors who are actively working in the field*

Resources

Cal/OSHA State of California Construction Safety Orders.

California Code of Regulations, Title 8,
Industrial Relations, Chapter 4, Subchapter 4.
Barclays Law Publishers,
P.O. Box 95767,
Chicago, IL 60694.
(800) 888-3600.
FAX: (415) 732-8861.

Building News, Inc.
1612 S. Clementine Street,
Anaheim, CA 92802.
(800) 873-6397
FAX: (714) 535-8078.
INTERNET: ccr.oal.ca.gov or www.bni-books.com

Principles of Refrigeration.

Marsh, Warren R. and Olivo.
Thomas C. Delmar Publishing,
Albany, NY.
(518) 464-3500.
FAX: (518) 464-0358.
INTERNET: www.delmar.com

Refrigeration and Air Conditioning.

Langley, Billy C.
Reston Publishing Co.(a Prentice-Hall Co.),
Reston, VA 22090.
(703) 821-5050.
FAX: (703) 917-0991.
INTERNET: www.prenticehall.com

California Mechanical Code.

International Conference of Building Officials (ICBO) and
International Association of Plumbing and Mechanical Officials (IAPMO).
ICBO,
5360 S. Workman Mill Road,
Whittier, CA 90601.
888) 699-0541.
FAX: (888) 329-4226.

IAPMO,
5001 E. Philadelphia Street,
Ontario, CA 91676.
(909) 472-4100
FAX (909) 472-4150
INTERNET: www.icbo.org or www.iapmo.org