Why low vacuum trip in condensing type steam turbine?
To protect the mechanical integrity of the unit. The condenser is not designed to hold a pressure and as such must be prevented from any positive pressure above atmospheric. Often rupture discs are fitted as a mechanical prevention against any pressure surge.
What is the equivalent of BS 1873 in API standard?
BS Standard is a Specification for steel globe and globe stop and check valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries
the list below are standards that i wish help to you
API 600
API 6D
API 6A
ASME B16.5
ASME B16.34
What describes a material's ability to reflect light or shine?
The material's Luster (lustrous would mean it reflects light) (dull is the opposite)
What is Stiffness of a helical spring?
a helical spring has N turns of coil of diameter D, and a second spring made of same material and of same wire diameter has N/2 turns of coil of diameter 2D. if stiffness of first spring is k, then stiffness of second spring is
What is the difference between Digital Scroll Compressor and Inverter scroll compressor?
In digital scroll compressors, the motor runs continuously at full speed, and the capacity of the compressor is adjusted by a digitally controlled mechanical unloader (slide bar) which adjusts the vertical positioning of the orbital scroll with respect to the fixed scroll thereby reducing its capacity.
In inverter scroll compressors, the relative positions of the scrolls does not change, but the speed of the motor is adjusted by a variable speed drive, which adjusts the capacity.
The inverter scroll compressor is more energy efficient at part load conditions than a comparable digital scroll compressor. The digital scroll compressor will more closely match a specified load, but is not as energy efficient as a comparable inverter driven compressor. Both types of compressors have associated built-in mechanisms to maintain compressor lubrication at low flow.
What are inserts in machining?
Tool inserts can be made of industry grade diamond, and various other ceramics such as tungsten carbide - which is most common. Tungsten tips are made by pressing the powered material into the tool tip shape (usually a diamond/kite shape for turning tools, triangles for milling) and then heated so the particles bond to each other. These tips can be fixed to the tool body and then used to machine, on a lathe or mill. The advantage of tip tooling is if the tip breaks only the tip needs replacing not the whole tool, or having to grind the worn tool. However tungsten will not tolerate intermittent cuts as well as HSS, such as taking the corners off a square bar in a lathe.
What is the difference between astm 105n and astm a350-lf2?
ASTM A105 - For ambient- and higher-temperature service in pressure systems.
ASTM A350 - intended primarily for low-temperature service and requiring notch toughness testing.
A: It is any system where there is negative feedback to control its behavior
Why bracing is used in structure?
very basically bracing is used so structure doesn't fall over.
it resists the lateral forces created from wind, earthquake and other loads.
What is hot tank and cold tank in lubricating system?
A hot tank oil system is one, in which returning oil in not cooled when it comes back to the tank . In a cold tank it is cooled before it reaches the tank.The only difference is the location of the oil cooler whether its downstream or upstream.
What is the function of IGV in gas turbine?
The function of IGV in a gas turbine is to prevent surges and stall conditions.
Manual drawings are usually hand drawn on mylar sheets using a drafting table. Computer aided can mean several things. Using the computer to simulate a drafting table, or solid modeling that can be copied to the machines of many. This would include CAD for design engineers, CAM for manufacturing people, CAQ for quality control, etc.
Why should dc series motor can be operated for no load and light load?
dc motors can be operated at no load as well as at load condition.But by using the swin burns test the efficiency can be calculated at no load which is more benficial than load test.At industries this swin burns test is used because for load test we have to give separate supply for the load to run.In no load test that power is saved.
Why Gas Turbine Exhaust temperature is above 500 deg C?
The exhaust temperature of gas turbines is very high due to the large amount of energy input into the inlet air by the combustion of fuel in the combustion chamber.
Why is carnot cycle not suitable as an ideal cycle for all power producing cyclic devices?
The Carnot Cycle is a prime example of what is possible under the laws of physics however the cycle is impractical to build. The facts that its keeps stepping back and forth from isothermal to adibatic processes make it very hard to construct.
distance between the centre of two parallel cylinderin the sine bar
Is gate valve used for throttling?
Never. Throttling will erode the valve seat and then the valve will never shut off completely.
What is mean by hot working and cold working?
When ur hot and ur working then it is hot working, if ur cold and ur working then it is cold working
How do you remove different types of gears?
to remove diffrent types of gears i would punch auld Scoosh from new Callinton square in the face
What is meant by frame classification of gas turbine?
frame classification means mainly depended the with standing temperature
of the gas turbine casing.
What is the optimum utilization of a machine?
Optimum Utilization of Machine means to use a Machine in such a way that we produce at the maximum capacity after spending its minimum maintenance and other variable cost.
In Short, Higher Productivity in low Cost.
What is mean by reverse torque testing?
Once the initial torque is applied to the fastener, a reverse torque test can be performed to make sure that the fastener has not loosened due to vibration or other conditions like material fatigue or yielding.
So, lets say you tighten a bolt to 150inlb with a torque wrench. You should be able to take that torque wrench and apply 150inlb to the bolt in the reverse direction without the bolt loosening (reverse torque is gretaer in almost all cases, depending on materials because initial static friction must be overcome.)