?What is the major purpose of pre- and post-heating cast iron for welding?
A. ?To allow the weld to fuse deeper into the joint.
B. ?To control the rate of temperature change.
C. ?To reduce the carbon content in the casting around the weld which makes it less brittle.
D. ?It helps the weld metal flow more evenly into the crack.
Answer: B
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Which glass type is heat-modified glass (also called heat-treated glass) and what is the purpose of heat treating glass?
What will be an ideal response?
Which of these tasks falls into the category of rough carpentry?
a. Applying exterior siding b. Building and installing cabinets c. Applying exterior trim d. Framing a house
When performing an EGR system test on a vacuum operated EGR valve, how much should intake manifold vacuum decrease when the EGR valve is opened at fast idle?
A) 14.7 PSI B) 6-8 PSI C) 6-8 in. Hg. D) 1-2 in. Hg.
Refrigeration oil circulates with the refrigerant through the system.
Answer the following statement true (T) or false (F)