PE PDH
PDH Online

Review of Orifice Plate Steam Traps


Quiz Questions

1.Steam traps are important parts of any steam system. Their basic function is to prevent the passage of steam while allowing condensate to flow.
True
False
2. __________________ shows the steam supply and condensate drainage piping for a typical space heater application.
Figure 1
Figure 2
3.An orifice plate steam trap is a relatively simple condensate removal device. Its design includes a thin metal plate with a small-diameter hole through the center.
True
False
4. ______________________ have the ability to change the flow rate by varying the size of the orifice. They are constructed with a cylindrical-shaped element that is filled with temperature-sensitive hydrocarbon wax.
Variable orifice traps
Venturi orifice traps
5.Steam traps represent a common type of process equipment used in virtually all steam systems. Depending on their design, they may perform one or more of the following functions- keep steam from escaping, remove condensate and remove air.
True
False
6.Thermostatic, Mechanical & Thermodynamic are the different types of conventional traps.
True
False
7. Bimetallic traps include a valve element that expands and contracts in response to temperature changes. An alcohol mixture with a boiling point lower than that of water is contained inside the element and provides the necessary force to change the position of the valve.
True
False
8.____________________ contain a thermostatic element that is filled with oil. As the oil heats up and expands, it causes a piston to move and thereby close a valve. During start up, air and condensate are expelled from the open valve. When the oil is sufficiently heated by the steam, the valve closes to keep the steam from escaping.
Thermal expansion traps
Bellows trap
9.Float and thermostatic traps traps are similar to float and lever traps except they include a thermostatic element that allows air to be discharged at start up. Thermostatic elements used in these traps are the same as those used in thermostatic traps.
True
False
10.__________________ rely on flashing steam and the associated change in pressure to force a valve closed. These traps have an intermittent discharge and can fail either open or closed.
Disk traps
Piston traps or impulse traps