Classrep2

Stages of the Design Process - ANSWER-1)Identify 2)Conceptualize 3)Refine 4)Analyze 5)Prototype 6)Document 7)Produce 8)Life Cycle MNUEMONIC DEVICE????: ***IC RAP DPL (Dr.Pepper Lite) Problem Identification (Design process, STEP 1) - ANSWER-the design engineer must address questions and answers from the customer's/client's perspective and from the engineer's perspective. -may involve generating new ideas, or improving an existing design -may use MARKET SURVEY to determine spe...

Geometric Dimentioning and Tolerancing - ANSWER-specifies size, location, orientation, shape, and form of features Rectangular tolerance zones when locating cylindrical mating features are characteristics of - ANSWER-Plus/minus tolerancing Flatness - ANSWER-Trapezoid Parallelism - ANSWER-// Perpendicularity - ANSWER-_|_ Profile of a Line - ANSWER-Arc Profile of a surface - ANSWER-Semi-circle True Position - ANSWER-Crossed Circle RC - ANSWER-Running and Sliding Fit FN -...

sawing - ANSWER-a multitoothed cutting blade is pulled through the material Qualities of sawing - ANSWER-Pros: -Quick Cons: -precision -quality lathe - ANSWER-the workpiece is rapidly rotated about a single axis turning - ANSWER-Circumferential grooves and screw threads are made using this process, as are stepped, tapered, and rounded shaft boring - ANSWER-Removal of material on the inside of the workpiece drilling - ANSWER-a rapidly spinning cutting tool called a drill bit is...

ECHO 360 and Module Quizzes - ANSWER-ECHO 360 and Module Quizzes An assembly cannot be nested inside an existing assembly; only parts can - ANSWER-False I bring a part into an assembly in SolidWorks, and click the OK check mark at the top right. This will.. - ANSWER-leave the part in a floating state; align component with the assembly origin I bring a cube into an assembly and mate-coincident one of its edges to a fixed edge. It now has how many DOF's - ANSWER-2 Every part brought...

The engineering design process follows the same steps as the scientific discovery process, or scientific method. True? - ANSWER-No; there are major differences The term "IPS" in SolidWorks refers to... - ANSWER-measurement units To create an extrusion, I must first draw a sketch on a surface. True? - ANSWER-Yes, but the surface must be flat What are the fundamental types of sketch constraints? - ANSWER-Geometrical and dimensional To clock a hexagonal feature so that it rests horizo...

descriptive geometry - ANSWER-A 2D graphical construction technique used for geometric analysis of 3D objects Optimization - ANSWER-Modification of shapes, sizes, and other variables to achieve the best performance based on predefined criteria Why are most cave drawings and hieroglyphics not considered to be engineering drawings? - ANSWER-Becuase they were mostly documentation of lifestyle, not instructions on how to build something In what ways did the design of military fortifications...

Profile - ANSWER-a completed sketch that is used to create a solid Tangent - ANSWER-Touching but not intersecting Constraints - ANSWER-the geometric relationships, dimensions, or equations, that control the size, shape, and orientation and include assumptions that the CAD sketcher makes Implicitly defined - ANSWER-hidden from the sketcher Coincident - ANSWER-forces two points to coincide Concentric - ANSWER-makes the centers of arcs or circles coincide Collinear - ANSWER-forces...

In the ___________ Stage the design engineer must address questions and answers from the customer's/client's perspective and from the engineer's perspective - ANSWER-Problem Identification When a product is designed, one of the design considerations is how long will it be used before it is no longer effective, which is called - ANSWER-life cycle environmental concerns are considered throughout the process, not just at the end, because an engineer's choices in the problem definition sta...

GD&T - ANSWER-(Geometric dimensioning and tolerancing) A 3-D mathematical system that allows a designer to describe the form, orientation, and location of features on a part within precise tolerance zones. Advantages of GD&T - ANSWER-1) The system allows the designer to clearly specify design intent. 2) There is better communication throughout the design process. 3) The system is set up so that almost nothing can be interpreted in more than one way. 4) A datum reference frame 5) Specific ...

What date was the sale of CFC's & HCFC's restricted to technicians certified in refrigerant recovery? - ANSWER November 14, 1994 Section 608 of the Federal Clean Air Act requires technicians to what? - ANSWER Recover all refrigerants. The objective of the Clean Air Act is to protect what? - ANSWER The earth's stratosphere. HFC's - ANSWER HydroFlouroCarbon's CFC's - ANSWER ChloroFluoroCarbon's ODP - ANSWER Ozone Depletion Potential Which international treaty agreement was...

Which of the following refrigerants has a safety classification of B-1 - ANSWER HCFC-123 (R-123) The EPA-required evacuation level for recovery or recycling equipment used on low-pressure systems is - ANSWER 25 mm of Hg absolute. Which organization establishes the refrigerant safety group standard? - ANSWER ASHRAE Where is the purge unit located in a low-pressure system? - ANSWER The top of the condenser. To repair a chiller operating with R-22, the technician; - ANSWER must ha...

a Type III Technician or Universal Technician are certified to do what? - ANSWER Maintain, service, repair, or dispose of low-pressure appliances. Most low pressure appliances are used for what? - ANSWER Most low pressure appliances are used for comfort cooling and are subject to lower allowable leak rate. The owner and/or operator of the equipment is responsible for what? - ANSWER for keeping records of all leaking inspections and any completed leak repair verification tests. It is their ...

A-1 - ANSWER refrigerants CFC-12, HCFC-22, HFC-134a are all classified as type what substances? 15 hg - ANSWER when recovering refrigerant from a medium pressure system with more than 200lbs of refrigerant, recover to a level of? 30% - ANSWER EPA requires that all industrial process refrigeration systems containing more than 50 lbs of refrigerant MUST be repaired when the annual leak rate excceds? pressurize system using controlled hot water - ANSWER whats the most efficient method of l...

Which of the following best describes the refrigerant recovery process from an R-123 system? - ANSWER Start with liquid removal and then switch over to vapor recovery. Under ASHRAE Standard 34, R-134a is classified as; - ANSWER A1 When charging a low-pressure system, refrigerant should be introduced to the system as a vapor to raise the system's saturation temperature to a minimum of; - ANSWER 36 Degrees In a low-pressure chiller, air and other non-condensables collect at the; - ANSWER...

A-1 - ANSWER refrigerants CFC-12, HCFC-22, HFC-134a are all classified as type what substances? 15 hg - ANSWER when recovering refrigerant from a medium pressure system with more than 200lbs of refrigerant, recover to a level of? 30% - ANSWER EPA requires that all industrial process refrigeration systems containing more than 50 lbs of refrigerant MUST be repaired when the annual leak rate excceds? pressurize system using controlled hot water - ANSWER whats the most efficient method of l...

A-1 - ANSWER refrigerants CFC-12, HCFC-22, HFC-134a are all classified as type what substances? 15 hg - ANSWER when recovering refrigerant from a medium pressure system with more than 200lbs of refrigerant, recover to a level of? 30% - ANSWER EPA requires that all industrial process refrigeration systems containing more than 50 lbs of refrigerant MUST be repaired when the annual leak rate excceds? pressurize system using controlled hot water - ANSWER whats the most efficient method of l...

On low-pressure chillers, moisture most frequently enters the system through; a. air leaks in the rupture disc assembly. b. tube leaks in the evaporator. c. leaks from areas with gaskets or fittings. d. leaks from the charging service valve. - ANSWER c. leaks from areas with gaskets or fittings. What precaution should be taken prior to recovering refrigerant from a chiller suspected of having tube leaks? a. Drain the water sides of the evaporator and continue. b. Run the circulating pum...

Before recovering refrigerant from a chiller suspected of having tube leaks,... - ANSWER ...drain the water sides of the evaporator and condenser. Draining the water sides helps to avoid the introduction of additional water into the system cause by the evacuation process and to prevent the water from freezing as the refrigerant evaporates during recovery. How can you pressurize a low-pressure chiller to make a non-major repair? - ANSWER Warm up the system. Under EPA regulations, you may wa...

technicians maintaining, servicing, repairing, or disposing of low-pressure appliances must be certified as: - ANSWER Type III or Universal Technician the owner &/or operator of the equipment is responsible for keeping: - ANSWER records including: leak inspections & any completed leak repair verification tests it's the _______ &/or ___________ responsibility to obtain service records from the servicing company doing any work on an appliancem - ANSWER owner &/ or operator as of 11/14/94...

A typical setting for the high pressure cut-out control on a recovery unit used for evacuating the refrigerant from a low pressure chiller is: - ANSWER C) 10 psig. A charged low pressure refrigeration system can be efficiently leak checked by: - ANSWER D) raising system pressure by heating with circulated hot water or heating blankets. The existence of air in a low pressure system, causes __________. - ANSWER C) high head pressure. Which safety precaution should be adhered to for low pr...