Heat pump defrost is necessary in which mode of operation?
A. heating
B. cooling
C. either a or b
D. Defrost is never necessary for a heat pump system.
Answer: A
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Surface cracks can be located by using either a liquid penetrant or a _____ inspection process.? ?
A. grinding? B. slag removal? C. magnetic particle? D. preheating?
The information in a modern county soil survey report is generally used to ________ when designing a construction project
A) locate favorable sites B) draw up the design plans for building foundations C) indicate areas that require more intense on-site investigation than others D) replace laborious on-site soil investigation E) both A and C
The main difference between the telephone network and CATV voice network is the use of FTTC hybrid fiber coax systems to multiplex the voice signal onto the fiber
Indicate whether the statement is true or false
Lettering on sketches does not need to be readable.
Answer the following statement true (T) or false (F)