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What are the responsibilities of a Mechanical Maintenance Engineer?
as mechanical maintenance engineer following responsibility 1.doing preventive maintenance and keep machine condition good as possible. 2.finding machine requirement in running condition 3.attend machine breakdown and find the route course of same 4.check machine all spare parts and constable items stock as required.
What is mechanical maintenance?
A planned or unplanned repair on any machine to maintain its efficiency or performance.
Why synchronous impedance is not a constant?
Synchronous impedance is not a constant because it varies with operating conditions such as load, frequency, and machine construction. It is defined as the ratio of the voltage to the current at synchronous speed, but this relationship changes depending on the reactance and resistance of the machine as well as the power factor of the load. Additionally, factors such as saturation of magnetic materials and temperature can also influence synchronous impedance, leading to variations in its value.
How the rpm increase by changing frequency and voltage?
Let a rotating machine have following: Frequency (f); Speed of Motor (N); No. of Poles (P) N= (120*f)/P From above Speed N is directly proportional to frequency f indirectly proportional to number no. poles P
Why the synchronous motor is always a salient pole machine ie why don't we use a cylindrical pole machine as a synchronous motor?
The speed of the machine is tied to the power supply frequency and the number of poles the machine has. It becomes impractical to make a round rotor machine with many poles, so machines that spin at low revolutions will typically be salient designs. A two or four pole machine could be round rotor designs.
How do you determine machine efficiency?
Machine efficiency is typically determined by calculating the ratio of useful output to input. This can be done by comparing the actual output of the machine to its theoretical maximum output under ideal conditions. Factors such as energy losses, downtime, and maintenance can also affect machine efficiency.
What is machine history cards for maintenance?
Machine Life.
Does MRI machines need maintenance?
A MRI machine may need maintenance. When the machine gets so old it can cause it to break.
What is maintenance in engineering?
It is one thing to engineer or build a machine, it is totally different thing to keep the machine running a its best. Maintenance is the work that keeps things running and finds future problems before the problem stop the machine running at all. Maintenance is also fixing problems that stop the machine so the machine can be restarted
Which weights require the least maintenance?
Machine weights require little or no maintenance at all.
What are the factors affecting the power of a machine?
Factors affecting the power of a machine include the design and efficiency of the machine, the type and quality of energy input, friction and resistance within the machine, and any losses due to heat or other forms of energy dissipation. Additionally, the operating conditions, maintenance, and age of the machine can also impact its power output.
How can you tell if a machine is a GOOD machine or a BAD machine?
A good machine typically operates efficiently, reliably, and consistently meets performance expectations. In contrast, a bad machine may show signs of frequent breakdowns, lower productivity, and inconsistent output. Regular maintenance, performance monitoring, and user feedback can help determine the overall quality of a machine.
What is maintenance frequency?
Frequency of maintenance or preventative maintenance is regular inspections of machinery where cleaning, oiling and general maintenance such as retorting takes place. This means the machines are kept in a good operating condition and therefore reduces the risk of breakdowns. This can also be broken down into periodic and predictive maintenance. Periodic maintenance is checking inspecting and maintaining machines on a regular basis to prevent sudden failures. Predictive maintenance is when the condition of machines is monitored. By comparing trends and analysing data collected during inspections planned maintenance can carried out rather than waiting till the machine breaks to fix it which may result in more time downtime or higher costs of equipment because it has failed and as a result caused other equipment to fail or ordering emergency parts will cost more. Also the time wasted by all this means no money being made. For example if a bearing on a drive shaft seizes then this may cause damage to the shaft as well, resulting in new a new bearing and shaft needed instead of just the bearing.
What is the relationship between electrical frequency and magnetic field speed for an ac machine?
In an AC machine, the electrical frequency of the input power supply determines the rotational speed of the magnetic field, which interacts with the conductors in the machine to produce electrical power. The relationship between electrical frequency and magnetic field speed is directly proportional – an increase in electrical frequency results in a corresponding increase in the speed of the rotating magnetic field.
What happens when Electrical Frequency above the rated Frequency is given to an electrical Machine?
failure of generation and cause losses
What was the original job of a Millwright?
mechanic machine tool maintenance
Where can one purchase a high frequency machine?
One can purchase a high frequency machine from eBay where there are many such devices available for prices between $40 and $200. One can also get them from DHGate.
