If water flow through a system increases from 10 to 15 gpm and the initial pressure drop is 10 psi, the final pressure drop will be _____ psi.

Calculate the friction loss per 100' of pipe when the permissible head is 20' and the equivalent length of the piping is 200'. Use the formula: Friction loss (per 100') = permissible head/equivalent length of pipe × 100

Assume that the water flow through a system or device is increased from 75 to 150 gpm and that the initial pressure drop was 10 psi. The new or final pressure drop will be _____ psi.

Assume the total heat loss per hour of a building is 100,000 Btuh. What is the required water flow in gpm with a temperature drop across the coils of 20°F? Use the formula: gpm = hourly heat loss (HL) in Btuh/TD × 8.33 × 60

One significant difference between hot-water boilers and steam boilers is that _____.

Zoning systems which utilize zone valves generally use _____.

The safety relief valve used with a typical hot-water boiler protects the boiler from _____.

In a two-pipe, direct-return hydronic piping system, the water supply and the return water _____.

A device that allows for the safe expansion of water as it is heated is an _____.

A tankless heater is normally used in conjunction with a(n) _____.

When the power of a circulating pump is exactly equaled by the pressure drop (head pressure) opposed to it, the pump will _____.

The time required for a zone control valve to open or close typically ranges from _____ seconds.

For a given pump, the lower the volume of water delivered in gpm, the _____.

A common type of valve used to adjust water or steam flow within limits is a _____. 14) A) pressure-reducing valve B) check valve C) globe valve D) gate valve