Chapter 8 - Quiz

The balance between convective heat transfer and radiative heat transfer can significantly affect the comfort achieved by various heat emitters.

Finned-tube baseboard convectors operate on the principle that heated air rises due to its lower density.

As a rule, convectors are well suited for rooms with high ceilings.

Parallel piping methods allow independent flow rate adjustment for each baseboard.

When rooms lack the wall space needed to mount finned-tube baseboard, one alternative is to use a hydronic fan-coil.

The heat output of a fan-coil is approximately proportional to the temperature difference between the entering air and entering water.

The rate of heat transfer depends on either the temperature difference or the flow rate.

Panel radiators typically require much more wall space than fin-tube baseboard sized for equivalent heat output and operating conditions.

Reverse return piping encourages equal flow rates and equal supply temperature to each radiator.

A rule of thumb is to allow twice the linear footage of radiant baseboard compared to typical residential finned-tube baseboard.

A typical finned-tube baseboard convector consists of a sheet metal enclosure containing a __________ tube fitted with aluminum fins.

The heat output of finned-tube baseboard is expressed in Btu/hr./ft. of active element length. The active length of the element is the length of pipe _________.

When baseboards are connected _________, each receives water at the temperature supplied to the manifold.

Hydronic fan-coils have two common components—a(n) __________ heat exchanger (often called the “coil”) through which system fluid flows and a blower or fan that forces air to flow across the coil.

Increasing the fluid flow rate through the coil will __________ increase the heating capacity of the fan-coil.

To prevent corrosion, steel panel radiators should only be used in __________ systems.

Operating panel radiators at __________ water temperatures increases the percentage of radiant versus convective heat output from the panel.

The head loss of radiant baseboard can be determined by considering each baseboard to be a tubing circuit approximately _________ as long as the baseboard extrusion.

One way that heat loss of bare copper tube can be evaluated is when the length of the copper tube in feet divided by the flow rate in gallons per minute exceeds __________ ft./gpm, there will be a greater temperature drop along the tube from inlet to outlet.

Every hydronic heating system attempts to establish operating conditions that allow the distribution system to current rate of heat output from the heat source. This state is known as __________.