Regarding Head Tracked Displays, please mark True or False for the items below: 1. Head Tracked Displays (HTDs) track the location of the user’s head and update the image shown based on the user’s perspective.   2. Fishtank VR is not considered a type of Head Tracked Display.   3. One of the pros of HTDs is that they obscure the real world.   4. A con of HTDs is that they have a larger physical footprint compared to other VR systems.   5. Most HTDs are not stereoscopic.  

The low side pressure gauge reads pressures:

An interlock control system is used on central electric heating systems to ____.

Which of the following combustible gases is lighter than air?

The average weight of air at sea level will cause a column of mercury to rise to a level of:

Open loop, water-source heat pumps, used in commercial applications, utilize which of the following types of equipment to maintain a desired loop temperature?

Portable extension ladders should be placed one foot away from the vertical wall of a building for every ________________ of height to the point of support.

Refrigerant vapors or mists in high concentrations should not be inhaled since they :

Heat that travels from one molecule of a substance to another would be defined as what type of heat transfer?

The main products of 100% complete combustion of a hydrocarbon gas are: