Screw thread inserts are conically formed coils of diamond shaped wire made of stainless steel or phosphor bronze.
Answer the following statement true (T) or false (F)
False
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Explain the efficiency of a PV module when the cells warm up to above the standard operating temperature of 25°C (77°F).
What will be an ideal response?
Which of the following systems has achieved the highest gain in popularity in recent past years?
A) Videoconferencing. B) Time and program systems. C) Wireless telephone. D) Sound systems.
The immense debt owed to northern creditors by the South was
A. repaid immediately after the Civil War. B. repudiated by the South. C. paid by pro-Union southerners during the war. D. not repaid until the twentieth century. E. converted into long-term Confederate bonds.
?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.