The recommended method for applying the first layer of a built-up roof to prevent seepage of tar into the
rafter spaces is to _____.
a. apply a layer of tar and allow it to dry before applying the first layer of felt
b. apply a dry layer of felt, followed by the first layer of tar
c. apply a layer of tar, followed by insulating boards that will absorb any excess tar
d. place a flexible membrane over the decking, followed by the first layer of felt and asphalt
Question 2
A bowstring truss should use horizontally laminated layers of wood to create the arched top chord, rather
than vertically laminated lumber, because _____.
a. the top surface is smoother, creating a better surface for fastening roofing materials
b. vertically laminated wood cannot be bent to form the required arch
c. the arched chord gains strength from the individual arched layers of wood
d. vertically laminated wood cannot be cut into an arched shape
The Scientific Method
The Steps of the Scientific Method
Testing for Glucose in Urine Using the Tablet Method
Solid-phase synthesis of oligonucleotides by the phosphoramidite method
Linear programming problems using the simplex method.