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Author Question: The strength of concrete depends on the _____. a. percentage of sand in the mix b. water-cement ... (Read 76 times)

AEWBW

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on: Jul 27, 2018
The strength of concrete depends on the _____.
 
  a. percentage of sand in the mix
  b. water-cement ratio
  c. type of cement used
  d. mixing time

Question 2

An R22 system specifies a subcooling of 10F at the current operating conditions. The technician measures a liquid pressure of 226 psig and a liquid line temperature of 90F. The system is
 
  A) undercharged B) overcharged C) charged correctly


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Chou

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Reply #1 on: Jul 27, 2018
Answer to Question 1

b

Answer to Question 2

B


AEWBW

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Reply 2 on: Jul 27, 2018
Wow, this really help

xiaomengxian

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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