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Industrial Engineering
Industrial Engineering is the branch of engineering that deals with the creation and management of systems that integrate people and materials and energy in productive ways. An industrial engineer studies industrial productivity and makes and implements recommended changes.
2,298 Questions
Why are roughing and finishing cuts made?
Roughing cuts are used to bring the diameter of the workpiece down to the rough size of what is specified on the engineering drawing or instruction. This gives some lee-way for any mistake we may make at some stage.
We then use a finishing cut to bring the workpiece down to a specified length/diameter, and also a specified surface finish in some cases.
How can you compare two forecasting methods?
You can compare forecasting methods by one of these methods:
1- MAD(mean absolute deviation)
2-MSE (mean square error)
3-MAPE(mean absolute percentage error)
Notes:
1-MAD is the preferred method since it does not require squaring the errors and this is the only difference between MAD and MSE .
2-If you want to relate the error relative to the actual demand use MAPE
that is because in MAPE you will divide the error by the actual demand.
Proof machining means>> If part have too much dispensable material to remove through out machining than machining is done on the same to remove all material till it will have only 2~3 mm to achieve its final dimensions , this process is called proof machining or if part have 1~2 mm material to remove for coming it final dimensions then Cutting tool path proving done & is called proof machining.
What is the endurance limit of mild steel?
The endurance limit for steel, as a general term, flattens out at around 30ksi stress. As the cycles go to infinity, the endurance level for most steels stays above 25ksi stress.
What is lubricant contamination?
Lubricant contamination can be many things, but main ones usually are
Water from various sources include moisture in the air, coolant leaks and rain.
Dust and Dirt
Rust
Weld splatter (Build Debris)
Paint
Fibers
Incorrect oils
Wear particles
Soot
Other oils (often incorrectly used)
Worn Seals
The list goes on but these are the usual things to find. Correct filtration should remove most things (except the oil) but it is better to start with very clean oil to start with. New oil is not always clean oil.
What are the differences between raw material inventory and finish product inventory?
These are some differences in the general cases.
FINISHED PRODUCT INVENTORYRAW MATERIAL INVENTORYUsually there is no lead timeUsually there is a lead timeQuantities reach the inventory individually or by groupsQuantities reach the inventory all togetherThe holding cost is greater than the holding cost for the raw material inventoryThe holding cost is less than the holding cost for the finish product inventoryproduction starts if the inventory is emptyproduction stops if the inventory is emptyUsually is smaller in size than the raw material inventoryUsually is bigger in size than the finish product inventoryQuantity size depends on the demandQuantity size depends on the productionproduction stops if the inventory is fullproduction starts if the inventory is fullExcess quantity in the inventory means marketing methods need to be improvedExcess quantity in the inventory means manufacturing methods need to be improvedproduction quality can be measured in these inventoryproduction quality can not be measured in these inventory
What types of electrical earthing systems are used in buildings?
Earthing is necessary for equipment safety and for human safety.
Answer for USA, Canada and countries running a 60 Hz supply service.
There are two types of earthing, they are:
- Plate earthing
and
- Pipe earthing.
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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
What is difference between shot blasting and shot peening?
These are unlike processes applied to achieve different results. The only similarities are basic: each is a process of propelling media at a high velocity to strike a surface. Shot peening however requires control over a consistent size and shape of media, a consistent velocity of media, a consistent volume of media striking each surface area, and for a consistent length of time. Careful controls yield consistent and repeatable results that are not measurable visually. Blast cleaning is ordinarily less controlled, therefore less expensive, and results can usually be assessed visually.
What resistance value is add to convert a galvanometer into a voltmeter?
It depends on the resistance of the galvanometer and the current required to reach full scale. A 100 ohm meter requiring 1 milliampere would require 99.9 KOhms in series to become a 100 volt voltmeter.
What are 5 safety precautions needed when setting up an abrasive cutting wheel to cut steel?
There are many precautions to take when cutting with any tools, here are a few:
1. Ensure that the cutting disc is correctly fitted and that any protective guards are in place. In the UK, the equipment may need to be electrically PAT tested. (Portable Appliance Testing).
2. Wear the correct Personal Protective Equipment (PPE). Goggles, Gloves, Ear defenders etc.
3. Ensure that the steel is securely fixed and will not move during cutting.
4. Create a safe working area. Screens/barriers and warning signs may be required if other people are nearby.
5. Remove any flammable items from the area (Oily rags, fuel cans, paper etc). Sparks can cause fires. A fire-extinguisher should be on standby and possibly a fire-watcher.
What is the cost of studs for a 30X40 building?
It costs Rs.12 Lakhs for a very normal house. For a good & attractive house costs 17 lakhs depending on your requirement & taste for 30x40 or 12 squares.
Can Allen Bradley Programmable Logic Controllers Be Traced If Stolen?
They all have a unique serial number on them. Allen Bradley can identify where they were manufactured and which distributor or end user actually purchased the PLC. But the unit can only be traced if the person that took it tried to sell it.
What is LRB for insulation material?
LRB (Light resin Bonded) Epoxy is used for insulation purposes. It is sponge-like material. It is usable typically up to 400degC. Commonly, it is also called 'mineral wool'.
What is isolator with earth switch?
A disconnector or isolator switch is used to make sure that an electrical circuit can be completely de-energised for service or maintenance. Such switches are often found in electrical distribution and industrial applications where machinery must have its source of driving power removed for adjustment or repair. High-voltage isolation switches are used in electrical substations to allow isolation of apparatus such as circuit breakers and transformers, and transmission lines, for maintenance. Often the isolation switch is not intended for normal control of the circuit and is used only for isolation; in such a case, it functions as a second, usually physically distant master switch (wired in series with the primary one) that can independently disable the circuit even if the master switch used in everyday operation is turned on.
Isolator switches have provisions for a padlock so that inadvertent operation is not possible (see: Lockout-Tagout). In high voltage or complex systems, these padlocks may be part of a trapped-key interlock system to ensure proper sequence of operation. In some designs the isolator switch has the additional ability to earth the isolated circuit thereby providing additional safety. Such an arrangement would apply to circuits which inter-connect power distribution systems where both end of the circuit need to be isolated.
The major difference between an isolator and a circuit breaker is that an isolator is an off-load device intended to be opened only after current has been interrupted by some other control device. Safety regulations of the utility must prevent any attempt to open the disconnector while it supplies a circuit.
Standards in some countries for safety may require either local motor isolators or lockable overloads (which can be padlocked).
How much horsepower and torque does a 1978 Olds 350 Rocket have?
Chiltons manual says 170 horsepower and 275 ft.-lbs. of torque.
What are examples of Bending Force?
A good example of Bending Force would be a beam or a pillar. Also a rubber band or elastic.
I hope this helped,
M.M.
What is jigging in galvanizing?
jigging is the name of the process of hanging items on a wire prior to suspending into molten zinc to galvanize the steel
How would you calculate the admittance if you were given impedance?
To calculate the admittance if you are given the impedance, you take the inverse of the impedance ( that is 1/z).
Why perform transformer oil colour test?
Transformer oils are subject to electrical and mechanical stresses while a transformer is in operation. In addition there are contaminations caused due to chemical interactions with windings and other solid insulations, catalyzed by high operating temperature. As a result the original chemical properties of transformer oil changes gradually, rendering it ineffective for its intended purpose after many years. Hence this oil has to be periodically tested to ascertain its basic electrical properties, and make sure it is suitable for further use or necessary actions like filtration/regeneration has to be done.
