If an OBD II PCM has set a catalyst efficiency code, all of the following pre-checks should be performed before condemning the converter EXCEPT for:
A. checking the exhaust system for any leaks
B. using a scan tool to check for O2 sensor codes
C. visually checking the O2 sensors for cracked housings
D. verifying that the engine does not have excessive cycling
Answer: D
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The Southern Pine Inspection Bureau has established fifteen categories of stress-graded lumber ____ in. or less in thickness.
A. 2 B. 3 C. 4 D. 5
Standard takeoff sheets are used to _____.
a. provide a permanent record, reduce the workload, and supplement the as-built drawings b. reduce the workload, decrease the potential for error, and supplement the as-built drawings c. decrease the potential for error, reduce the workload, and provide a permanent record d. supplement the as-built drawings, decrease the potential for error, and provide a permanent record
?What is the numeric SA of the engine controller on the J1939 bus?
A. ?00 B. ?03 C. ?128 D. ?130
Overlapping stringer beads must be carefully cleaned to prevent _____
a. arc blow b. arc wander c. undercutting d. slag inclusions