Which of the following causes stress concentration?
Stress concentrations occur when there are irregularities in the geometry or material of a structural component that cause an interruption to the flow of stress. This arises from such details as holes, grooves, notches and fillets. Stress concentrations may also occur from accidental damage such as nicks and scratches.
What is stress concentration factor kt?
A multiplying factor for applied stress that allows for the presence of a structural discontinuity such as a notch or hole; Kt equals the ratio of the greatest stress in the region of the discontinuity to the nominal stress for the entire section.
Which of the following reduces the stress concentration *?
Use of multiple notches. Drilling additional holes. Removal of undesired material.
What is the meaning of safety factor?
The definition of the safety factor is simple. It is defined as the ratio between the strength of the material and the maximum stress in the part. When the stress in a specific position becomes superior to the strength of the material, the safety factor ratio becomes inferior to 1, this when there is danger.
What is the importance of load factor?
Load factor is an expression of how much energy was used in a time period, versus how much energy would have been used, if the power had been left on during a period of peak demand. It is a useful indicator for describing the consumption characteristics of electricity over a period of time.
What is the effect on load factor?
It is a measure of the utilization rate, or efficiency of electrical energy usage; a high load factor indicates that load is using the electric system more efficiently, whereas consumers or generators that underutilize the electric distribution will have a low load factor.
What is the importance of load curve?
Load curve decides the installed capacity of a power station. It is helpful in choosing the most economical sizes of the various generating units. The load curve estimates the generating cost. It decides the operating schedules of the power station, i.e., the sequence in which the different generating units should run.
What are 3 methods of determining the weight of a load?
Simple Methods to Determine the Weight of a Load
- Look at the Load to See if the Weight is Marked.
- Load Familiarity.
- Refer to Engineered Prints or Design Plans.
- Review Bill of Lading or Shipping Documentation.
- Use an Industrial Scale.
- Refer to the Manufacturer’s Specifications or Catalog Data.
How do I calculate KVA?
Use the formula: P(KVA) = VA/1000 where P(KVA) is power in KVA, V is voltage and A is current in amperes. For example, if V is 120 volts and A is 10 amperes, P(KVA) = VA/1000 = (120)(10)/1000 = 1.2 KVA.