Two technicians are discussing clogged EGR passages. Technician A says that clogged EGR passages can cause excessive NOx exhaust emission. Technician B says that clogged EGR passages can cause the engine to ping (spark knock or detonation). Which technician is correct?
A) Technician A only
B) Technician B only
C) Both technicians
D) Neither technician
C
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A work clamp ____.
A. may have power losses that should be ignored B. reduces welding efficiency C. must not clamp too tightly to the material D. should be carefully touched occasionally to determine if it is hot
Cattle have the tendency to follow a(n) ____________________ passageway and will usually want to circle to the ____________________
Fill in the blank(s) with correct word
Answer the following with regard to the TTT diagram of a steel of eutectoid composition, shown in Fig. 18.13, and assumed that the specimens involved in the various cooling paths were cut from a thin sheet and austenitized at 750°C before cooling. Describe the microstructure resulting from being:
(a) Cooled to room temperature in less than 1 second. (b) Cooled to 160°C in less than 1 second, and then maintained at this temperature for several years. (c) Quenched to 650°C, and held at this temperature for 1 day, then quenched to room temperature.
The root reinforcement on the inside of the pipe from a completed weld should be flush to a maximum of
_____. a. 1/8" (3 mm) b. 1/4" (6 mm) c. 1/16" (1.6 mm) d. 1/2" (13 mm) WELDING LEVEL THREE MODULE 29306-16 EXAM 2 Copyright © 2016 NCCER. Permission is granted to reproduce this page provided that copies are for local use only and that each copy contains this notice.