WHIMIS
If a Hazardous material were to be transferred to a smaller approved container for ease of use on a jobsite what must be done?
What is, A workplace label with the required safety data needs to be affixed to the new container?
The preferred location of an air separator ?
What is on the supply main closer to the boiler?
Required on all potable make up water lines ?
What is Backflow prevention
Also known as the 1st fed 1st return system ?
What is a direct return system
Closely spaced tees create hydraulic separation between primary and secondary loops by limiting the ____ ____ between the tees?
What is Head loss / friction loss.
What characteristics of an impellor will increase the volume it can produce ?
What is the width of the impellor.
Requires 18" of straight horizontal pipe on the inlet side?
What is an Air scoop or Air purger.
Some make up water assembly's come with a feed valve that has a lever to quick fill the system. If not a bypass is recommended for this purpose. What device must not be bypassed?
what is the backflow preventer.
What principal is the Diversion tee system based on?
What is Bernoulli's Principal (where velocity is greatest, pressure is least).
A piping arrangement that limits unwanted thermal migration (thermosiphoning) through a static hydronic loop?
What is a thermal trap.
Another name for 3 piece circulators ?
What is Dry rotor pumps.
This device has disks swell up in the presence of water and shrink in the presence of air?
what is an automatic disc air vent.
This must be installed directly into every Boiler with no other valves between itself and the boiler ?
What is a pressure relief valve.
A two pipe system that provides a well balanced system without the use of balance valves?
What is a Reverse return system.
Horizontal pipes that connect heat transfer units to a riser or the main ?
What is Runouts
A 20 psi closed hydronic systems circulation pump can create a 10 psi pressure differential. The expansion tank is located 1/2 way between the inlet and outlet of the pump. what is the inlet and outlet pressures when circulating ?
What is 15 psi at the inlet and 25 psi at its outlet.
Air is most easily removed from water where the temperature is hottest and the flow rate is _____?
What is slowest"
A zone valve with 4 wires includes an end switch also known as a proving switch. What does this switch prove and why?
What is it proves the zone valve has fully opened so its safe to energize the pump via a relay.
What type of piping arrangement/configuration do most radiant in floor systems use?
What is the Home run distribution system
Sometimes called a spring piece this piping arrangement allows for expansion and contraction within the hydronic system??
What is a swing joint.
A 20 psi closed hydronic systems circulation pump can create a 10 psi pressure differential. The expansion tank is located 1/2 way between the inlet and outlet of the pump. what is the inlet and outlet pressures when static ?
What is 20psi .
Allows air in the top of a boiler to be routed to compression tank above the boiler rather than into the supply main ?
What is a Boiler fitting / Boiler tee
Can control the water temperature and flow rates both to the supply and return piping of the boiler ?
What is a four way mixing valve
The term used to describe systems with multiple pumps that work independently of each other and thus do not affect each others performance ?
What is Hydraulic separation.
Complete this statement," Balancing valves operate best between ___ ___ % open?
What is between 50 and 100 % open.