In some buildings, slab or thin-slab-type radiant panels are not possible. One alternative is called a tube and plate system. Instead of concrete or gypsum, this system uses ____ heat transfer plates to laterally conduct heat away from the tubing.

a. PEX
b. flanged
c. graphite
d. preformed aluminum


d. preformed aluminum

Trades & Technology

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Carlos has a herd of 96 cows on his cow-calf farm, and 35 percent of the cows have a calf. Estimate the number of calves he has at this time.

What will be an ideal response?

Trades & Technology

The use of ____________________ technology has made it possible to secure bST in larger quantities

Fill in the blank(s) with the appropriate word(s).

Trades & Technology

Which of the following did not result from the paradigm shift in agriculture?

a. A shift in thinking, from controlling nature to respecting the environment. b. The establishment of towns/cities. c. The use of astronomy to understand the seasons. d. The development of rule of law, and land ownership, e. The emergence of subsidiary or support trades-people

Trades & Technology

A salesman from Industrial Water Services (IWS), who is trying to get his foot in the door of Westco Refining, offered electro-dialysis equipment for $2.5 million. This is $800,000 more than the price offered by a competing saleswoman from AG En­terprises. However, IWS said Westco won’t have to pay for the equipment until the 2-year warranty runs out. IWS will also offer an extended 2-year warranty for $100,000, payable 2 years from now. If Westco does want the extended warranty, deter­mine which offer is better using Westco’s real re­turn requirement of 15% per year and an assumed inflation rate of 3.5% per year.

What will be an ideal response?

Trades & Technology