In which of the following types of boilers do combustion gases pass through tubes immersed in circulating water, which is then converted to steam?

The outermost layer surrounding the cerebrum is called the cerebral cortex. Composed of gray matter and containing neuron cell bodies and dendrites, the cortex contains ________ percent of all neurons in the nervous system

a. 25 b. 50 c. 75 d. 90

The majority of ground cover fires are extinguished with which item?

a. backfire b. aircraft c. backpack pump d. CAFS