Write down the one-dimensional transient heat conduction equation for a plane wall with constant thermal conductivity and heat generation in its simplest form, and indicate what each variable represents.
What will be an ideal response?
The one-dimensional transient heat conduction equation for a plane wall with constant thermal conductivity and heat generation is 
Here T is the temperature, x is the space variable, 
is the heat generation per unit volume, k is the thermal conductivity, a is the thermal diffusivity, and t is the time.
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Compare a block with a convolutional interleaver.
What will be an ideal response?
This is the most traditionally used welding method, which uses a flux-covered metal electrode to carry an electrical current forming an arc that melts the work and the electrode.
a. oxyacetylene welding b. shielded metal arc welding c. gas tungsten arc welding d. gas metal arc welding
Technician A says most sealants have a shelf life of about one year. Technician B says RTV sealants do not have a shelf life and can be used indefinitely after opening. Who is correct?
A. Technician A B. Technician B C. Both A and B D. Neither A nor B
What would be the final volume of 4 ft3 of gas that is compressed from 60°F at 70 psig to 150° at 210 psig?
A) 4.4 ft3 B) 1.8 ft3 C) 22 ft3 D) 2.2 ft3