4BE3.5 U3 C4 Obj 4

<p>Altitude gauge</p> Signup and view all the answers

<p>Two</p> Signup and view all the answers

<p>To show the normal height of water in the system</p> Signup and view all the answers

<p>Greater than the altitude</p> Signup and view all the answers

<p>It must be graduated to between 1 ½ and 3 ½ times the safety relief valve set pressure</p> Signup and view all the answers

<p>80°C</p> Signup and view all the answers

<p>In the boiler room</p> Signup and view all the answers

<p>It gets compressed</p> Signup and view all the answers

<p>To separate air bubbles from the water flow</p> Signup and view all the answers

<p>520 kPa</p> Signup and view all the answers

<p>Closed expansion tanks for systems above 200 kPa</p> Signup and view all the answers

<p>To permit servicing, replacing, and repairing the expansion tank without draining the system</p> Signup and view all the answers

<p>Corrosion of steel piping and heating units</p> Signup and view all the answers

<p>To dampen the needle movement in the gauge</p> Signup and view all the answers

<p>20°C</p> Signup and view all the answers

<p>Tridicator gauge</p> Signup and view all the answers

<p>At least one</p> Signup and view all the answers

<p>10% above MAWP</p> Signup and view all the answers

<p>To allow the boiler to be drained without emptying the system</p> Signup and view all the answers

<p>120°C</p> Signup and view all the answers

<p>To drain the boiler for maintenance or extended layup</p> Signup and view all the answers

<p>It flows into the expansion tank</p> Signup and view all the answers

<p>It flows back into the system</p> Signup and view all the answers

<p>To shut off the fuel supply when the boiler water level falls below a certain point</p> Signup and view all the answers

<p>It allows the gauge to be shut off from the boiler for maintenance</p> Signup and view all the answers

<p>Because hot water boilers are completely filled with water</p> Signup and view all the answers

<p>Altitude gauge</p> Signup and view all the answers

<p>Two pointers, one that is operated by the bourdon tube assembly and another that is manually placed in a fixed position</p> Signup and view all the answers

<p>Greater than the altitude</p> Signup and view all the answers

<p>It must be graduated to between 1 ½ and 3 ½ times the safety relief valve set pressure</p> Signup and view all the answers

<p>To absorb the expansion of water when it heats up</p> Signup and view all the answers

<p>20°C</p> Signup and view all the answers

<p>To relieve pressure in the boiler</p> Signup and view all the answers

<p>Equal to the pressure stamped on the boiler</p> Signup and view all the answers

<p>Because the boiler is located above the system</p> Signup and view all the answers

<p>To provide storage space for excess water due to expansion</p> Signup and view all the answers

<p>It flows back into the system</p> Signup and view all the answers

<p>10% above the MAWP</p> Signup and view all the answers

<p>To drain the boiler for maintenance or extended layup</p> Signup and view all the answers

<p>Between DN 20 and DN 100 (NPS ¾ and NPS 4)</p> Signup and view all the answers

<p>Tridicator gauge</p> Signup and view all the answers

<p>To provide a cushion for thermal expansion of the water</p> Signup and view all the answers

<p>520 kPa</p> Signup and view all the answers

<p>It eliminates the problem of oxygen corrosion</p> Signup and view all the answers

<p>To measure the water level in the tank</p> Signup and view all the answers

<p>They can only be used in systems with a maximum water temperature of 80°C</p> Signup and view all the answers

<p>To allow the tank to be drained without draining the system</p> Signup and view all the answers

<p>They must be designed and constructed in accordance with ASME BPVC VIII, Division 1</p> Signup and view all the answers

<p>It causes corrosion of steel piping and heating units</p> Signup and view all the answers

<p>To indicate whether the hot water system is full</p> Signup and view all the answers

<p>Because hot water boilers are completely filled with water</p> Signup and view all the answers

<p>The safety relief valve set pressure</p> Signup and view all the answers

<p>To shut off the gauge from the boiler</p> Signup and view all the answers

<p>It refers to pressure gauges calibrated in terms of height of water</p> Signup and view all the answers

<p>To show the normal height of water in the system</p> Signup and view all the answers

<p>It must be graduated to between 1 ½ and 3 ½ times the safety relief valve set pressure</p> Signup and view all the answers

<p>To accommodate the expansion of water as it heats up</p> Signup and view all the answers

<p>The MAWP plus 5%</p> Signup and view all the answers

<p>At least equal to the pressure stamped on the boiler</p> Signup and view all the answers

<p>To provide storage space for excess water due to expansion</p> Signup and view all the answers

<p>At least 20°C</p> Signup and view all the answers

<p>Between DN 20 and DN 100</p> Signup and view all the answers

<p>When the boiler is located above the system</p> Signup and view all the answers

<p>Tridicator gauge</p> Signup and view all the answers

<p>It flows into the expansion tank</p> Signup and view all the answers

<p>10% above the MAWP</p> Signup and view all the answers

<p>To drain the boiler for maintenance or extended layup</p> Signup and view all the answers

<p>To calculate the required volume of the expansion tank</p> Signup and view all the answers

<p>It separates air bubbles from the water flow and directs them into the tank</p> Signup and view all the answers

<p>They cause corrosion of steel piping and heating units</p> Signup and view all the answers

<p>To allow the tank to be drained without draining the system</p> Signup and view all the answers

<p>They must be designed in accordance with ASME BPVC VIII, Division 1</p> Signup and view all the answers

<p>They eliminate the problem of oxygen dissolving into the water</p> Signup and view all the answers

<p>To show the level of the water in the tank</p> Signup and view all the answers

<p>They can only be used in systems with a maximum water temperature of 80°C</p> Signup and view all the answers

<p>Pressure or altitude gauge = Measures pressure in hot water heating boilers Thermometer = Measures temperature in hot water heating boilers Safety relief valve = Opens at a set pressure to release excess pressure Expansion tanks = Stores excess water in hot water heating systems</p> Signup and view all the answers

<p>Stop valves = Isolates sections of piping for maintenance Low water fuel cut-offs = Cuts off fuel supply if water level is too low Safety relief valve = Opens at a set pressure to release excess pressure Drain valve = Drains water from hot water heating boilers</p> Signup and view all the answers

<p>Expansion tanks = Located near the boiler or in the piping system Stop valves = In the supply and return pipe connections Pressure or altitude gauge = Connected to the boiler or flow connection Thermometer = On the boiler or in the piping system</p> Signup and view all the answers

<p>Bladder-style expansion tanks = Reduces water hammer and noise Isolation and drain valves = Easier maintenance and draining of expansion tanks Siphons = Not required in hot water heating systems ASME BPVC IV = Establishes safety standards for boilers and pressure vessels</p> Signup and view all the answers

<p>Altitude gauge = Calibrated in terms of height of water Pressure gauge = Measures pressure in hot water heating boilers Thermometer = Measures temperature in hot water heating boilers Safety relief valve = Opens at a set pressure to release excess pressure</p> Signup and view all the answers

<p>Expansion tanks = Store excess water in hot water heating systems Pressure or altitude gauge = Monitor pressure in hot water heating boilers Thermometer = Monitor temperature in hot water heating boilers Safety relief valve = Releases excess pressure in hot water heating boilers</p> Signup and view all the answers

<p>Pressure or altitude gauge = Scale graduated to 1 ½ to 3 ½ times the safety relief valve set pressure Thermometer = Minimum temperature reading required Stop valves = Minimum pressure rating required Expansion tanks = Designed and constructed according to ASME BPVC VIII, Division 1</p> Signup and view all the answers

<p>Open expansion tanks = Limited by maximum water temperature Closed expansion tanks = May be located indoors or outdoors Bladder-style expansion tanks = None mentioned Non-bladder style expansion tanks = Pose the problem of waterlogging</p> Signup and view all the answers

<p>Air separator = Separates air bubbles from the water flow Drain valve = Allows draining the expansion tank without emptying the system Gauge glass = Monitors the level of water in the expansion tank Shutoff valve = Isolates the expansion tank for maintenance and repair</p> Signup and view all the answers

<p>Open expansion tank = Limited to systems with a maximum water temperature of 80°C Closed expansion tank = Can be used in systems with high operating temperatures and pressures Bladder-style expansion tank = Eliminates the problem of oxygen dissolving into the water Non-bladder style expansion tank = Brings air into direct contact with the water</p> Signup and view all the answers

<p>ASME BPVC IV Part HG-709 = Covers provisions for thermal expansion in hot water systems ASME BPVC VIII, Division 1 = Applies to expansion tanks for systems designed to operate above 200 kPa ASME BPVC IV Part HG-709.2 = Addresses expansion tanks and includes calculations for determining the required volume ASME BPVC = Applies to hot water heating boilers and systems</p> Signup and view all the answers

<p>Expansion tank = Often located in the boiler room Air separator = Connected to the supply main Shutoff valve = In the connecting line between the expansion tank and the hot water supply header Gauge glass = In the expansion tank</p> Signup and view all the answers

<p>System cools down and decreases in volume = Water in the expansion tank contracts System increases in temperature and pressure = Water in the expansion tank expands Drain valve is opened = Water in the expansion tank is drained Hydrostatic test is performed = Expansion tank is pressurized to 520 kPa</p> Signup and view all the answers

<p>Bladder-style expansion tank = Eliminates oxygen dissolving into the water Nitrogen-charged expansion tank = Prevents corrosion of steel piping and heating units Air separator = Separates air bubbles from the water flow Drain valve = Drains the expansion tank without emptying the system</p> Signup and view all the answers

<p>Expansion tank = Must be designed for a minimum hydrostatic test pressure of 520 kPa Stop valve = Must have a minimum pressure rating of 200 kPa Safety relief valve = Must be sized according to the system's requirements Thermometer = Must have a minimum temperature rating of 80°C</p> Signup and view all the answers

<p>Bladder-style expansion tank = Eliminates the problem of oxygen dissolving into the water Closed expansion tank = Can be used in systems with high operating temperatures and pressures Isolation and drain valves = Allow servicing, replacing, and repairing the expansion tank without draining the system Gauge glass = Monitors the level of water in the expansion tank</p> Signup and view all the answers

<p>Pressure gauge = Measures pressure in the boiler Thermometer = Measures temperature in the boiler Safety relief valve = Releases excess pressure in the boiler Drain valve = Allows draining of the boiler for maintenance</p> Signup and view all the answers

<p>Stop valve = Minimum pressure rating equal to the pressure stamped on the boiler Drain valve = Minimum temperature rating of 120°C Safety relief valve = Size between DN 20 and DN 100 Expansion tank valve = Must be designed and constructed in accordance with ASME BPVC VIII, Division 1</p> Signup and view all the answers

<p>Pressure gauge = Before and after hot water circulation pumps Thermometer = At or near the boiler outlet Stop valve = In the supply and return pipe connections of each boiler Drain valve = At the bottom connection of the boiler</p> Signup and view all the answers

<p>Expansion tank = Provides storage space for excess water due to expansion Safety relief valve = Prevents excessive pressure buildup Stop valve = Allows the boiler to be drained without emptying the entire piping system Drain valve = Allows draining of the boiler for maintenance</p> Signup and view all the answers

<p>Thermometer = Minimum reading of 20°C and maximum reading of 160°C Safety relief valve = Set to relieve at or below the maximum allowable working pressure of the boiler Stop valve = Must be fully open during operation Drain valve = Must be located at the lowest point of the boiler</p> Signup and view all the answers

<p>Expansion tank = Open or closed type Stop valve = Gate valve, ball valve, or butterfly valve Safety relief valve = Automatic reseating type Drain valve = Full port opening valve</p> Signup and view all the answers

<p>Expansion tank = Prevents excessive pressure buildup Safety relief valve = Allows excess water to flow into the expansion tank Stop valve = Prevents the boiler from being drained without emptying the entire piping system Drain valve = Causes the pressure to rise more than 10% above the MAWP</p> Signup and view all the answers

<p>Safety relief valve = Must be set to relieve at or below the maximum allowable working pressure of the boiler Expansion tank = Must be connected to the boiler and the system Stop valve = Must be located in the supply and return pipe connections of each boiler Drain valve = Must be located at the bottom connection of the boiler</p> Signup and view all the answers

<p>Open expansion tank = Maximum water temperature limit Safety relief valve = Maximum permissible increase in pressure above the MAWP Stop valve = Minimum pressure rating Drain valve = Must be fully open during operation</p> Signup and view all the answers

<p>Bladder-style expansion tank = Allows for easier installation and maintenance Safety relief valve = Prevents excessive pressure buildup Stop valve = Allows the boiler to be drained without emptying the entire piping system Drain valve = Allows draining of the boiler for maintenance</p> Signup and view all the answers