PD and Process Control Flashcards
The only strength of stress grade lumber that can be precisely determined without breaking the piece is
stiffness
The chief difference between exterior grade plywood and interior grade plywood is
that different types of glue are used
Warp, wane and checks are all factors that help determine the quality of
stress grade lumber
The Brinell Number of a material measures
hardness
A major classification group of stainless steels 6% to 22% nickel in addition to 16% to 26% chromium. This group differs from the other two major groupings in that its steels
are non-magnetic
The ultimate strength divided by the allowable stress is
factor of safety
If an engineering structure is to be designed against the rupture of any of its members under steady load, the factor of safety is a ratio based on working stress an
Ultimate strength
If an engineering structure is to be designed against the rupture of any of its members under steady load, the factor of safety is a ratio based on working stress an
Ultimate strength
The offset method is used to find a property of metals that do not have a well-defined stress-strain curve such as steel. This property is called
Yield point
In boiler calculations, the rivet is assumed to
Fill the hole after driving
The intermittent welds generally used to hold materials in place temporarily are called
double vee
In construction of a vinegar container tank, one of these metals of construction is not recommended
A. aluminum
B. Stainless steel
C. Brass
D. Monel
Brass
Bracket supports are most suitable for
Thick walled vertical vessels
Skirt support is most suitable for
Tall horizontal vessel
Design based on conditions giving least cost per unit time and max profit per unit production
Optimum economic design
A flow diagram, indicating the flow of materials, unit operations involved, equipment necessary and special information on operating temp and pressure is
Qualitative flow diagram
In a plant design implementation, soil testing is done to determine
load bearing capacity
This involves all engineering aspects in the development of either a new, modified, or expanded industrial plant
plant design
A chemical engineering specializing in the economic aspects of design
cost engineer
Actual design of the equipment and facilities necessary for carrying out the process
process design
The final step before developing construction plans for the plant and includes complete specifications for all components of the plant and accurate costs based on quoted prices
firm process design
A thorough systematic analysis of all factors that affect the possibility of success of a proposed undertaking usually with the market, technical, financial, socio-economic and management aspects
project feasibility study
Discusses the nature of the product line, the technology necessary for production, its availability, the proper mix of production resources and the optimum production volume
Technical feasibility
Discusses the nature of the unsatisfied demand which the project seeks to meet, its growth and the manner in which it is to be met
market feasibility
Simplest mode of control characterized by a two-position control commonly utilized in a thermostat for controlling the temperature of heaters, air conditioners, ref, etc.
On-off control
Control system in which the control action is independent of the output
Open loop system
An arrangement of physical components connected or related in such a manner as to command direct, regulate itself or another system
Control system
Control system in which the control action is somehow dependent on the output
Closed loop system
Property of a closed-loop system which permits the output to be compared with the input to the system so that the appropriate control action may be formed
Feedback control system
A frequency response measure of how well the system responds to variations in the input signal
bandwidth
A signal defined at, or of interest at, only discrete instants of the variable
Digital signal
A device that converts an analog or continuous signal into a discrete/digital signal
analog to digital converter
Convert one signal or energy form into another
Transducer
Part of the deviation of the response which approaches zero as time approaches infinity
steady state response
Integral of a unit step function
ramp function
A sensor usually made of a semiconductor that utilizes the effect of temperature on the resistance to current is called
thermistor
Integral of a Dirac function is a
Step function
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