The approximate R-value of an air space in a wall with an aluminum foil lining is
A) R-2.0.
B) R-2.5.
C) R-1.
D) R-1.5.
E) none of the above.
B) R-2.5.
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Answer the following statement true (T) or false (F)
When a load is placed on a truck with a C-channel, ladder frame, which ONE of the following is true of the C-channel rails?
A. neutral fiber is under compressional force B. upper flange is under tensional force C. lower flange is under tensional force D. the entire rail is under compressional force
To forward bias a silicon diode with a -71.6 V anode voltage, apply a ________ cathode voltage
A) -72.3 V B) +70.9 V C) +72.3 V D) -70.9 V
An alternate technique for placing the cutting-plane lines is called the reference arrow method. When using the reference arrow method for identifying sections, arrowheads point toward each end of the cutting-plane line and the section identification letters are placed at the ends of the cutting plane line. The view title is placed above the removed section when using the removed arrow method.
Answer the following statement true (T) or false (F)