Heavy Equipment Mechanics

Specific Competencies and Skills Tested in this Assessment:

Written Assessment:

Administration Time: 3 hours
Number of Questions: 200 

Areas Covered:

10% Diesel Fuel Injection System and Engine Troubleshooting
8% Hydraulic Systems
14% Electrical System
12% Diesel and Gasoline Engine Tune-Up and Overhaul
11% Power Trains
8% Steering and Suspension
7% Welding and Cutting
6% Brakes
5% Cooling Systems
4% Exhaust Systems
18% General (Includes Air Conditioning)

Sample Questions:

When there is an indication of low lubricating oil pressure, which of the following items should be checked first?

1.  the time of operation in dusty conditions
2. any time when moisture is present
3.  the time of fabrication, operation or careless service
4.  any time after the unit has been in service 

Contamination is the biggest enemy to a hydraulic system and it can enter the system at 

1. the time of operation in dusty conditions
2. any time when moisture is present
3. the time of fabrication, operation or careless service
4. any time after the unit has been in service 

The operating temperature at the top of the cylinder sleeve in a diesel engine may be as high as ________ degrees Fahrenheit. 

1. 11,000
2. 1,100
3. 100
4. 10 

On a self-energizing brake system, when the brakes are applied with the vehicle in forward motion, the secondary brake shoe 

1. does all of the braking
2. tends to rotate in the direction of the brake drum
3. has a larger amount of lining
4. forces the primary shoe into operation 

One function of the expansion valve in an air conditioning system is to control the flow of Freon into the evaporator; a second function of the valve is to 

1. return the Freon to a liquid state
2. return the Freon to a gaseous state
3. reduce the pressure on the Freon before it enters the evaporator
4. increase the pressure on the Freon before it enters the evaporator