Hot Surface Ignition System (HSI) controls lockout after how many unsuccessful attempts?
A) Two attempts B) The controls do not lock out.
C) Three or more attempts D) One attempt
C
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The best way to prevent an eye injury is to__________.
A. use one hand to shield your eyes when grinding metal. B. squint or blink rapidly when welding and do not look directly at the arc. C. keep your eyes tightly closed when cutting metal. D. always wear approved safety glasses.
Describe the function of the memory seat.
What will be an ideal response?
Why is it dangerous to use gauges only designed for R-22 on a R-410A system?
A) Because R-410a can dissolve the lining of the hoses used on R-22 systems B) Because the system pressures can exceed the design limit of the R-22 gauges C) Because R-410a and brass form an explosive new chemical compound on contact D) Because R-410a pressures are backwards from other types of refrigerant
The minimum end bearing of an open-web joist on a steel-bearing plate with no embedded anchors on a
concrete or masonry wall is _____. a. 2-1/2 inches b. 4 inches c. 5 inches d. 8 inches