Answer:
engine B is more efficient.
Explanation:
We know that Carnot cycle is an ideal cycle for all working heat engine.In Carnot cycle there are four processes in which two are constant temperature processes and others two are isentropic process.
We also kn ow that the efficiency of Carnot cycle given as follows
Here temperature should be in Kelvin.
For engine A
For engine B
So from above we can say that engine B is more efficient.
Answer Explanation : The general principles for design for assembly (DFA) are,
- MINIMIZE NUMBER OF COMPONENT
- USE STANDARD COMMERCIALLY AVAILABLE COMPONENTS
- USE COMMON PARTS ACROSS PRODUCT LINES
- DESIGN FOR EASE OF PART FABRICATION
- DESIGN PARTS WITH TOLERANCE THAT ARE WITHIN PROCESS CAPABILITY
- MINIMIZE USE OF FLEXIBLE COMPONENT
- DESIGN FOR EASE OF ASSEMBLY
- USE MODULAR DESIGN
- REDUCE ADJUSTMENT REQUIRED
STEPS TO MINIMIZE THE NUMBER OF PARTS
- USE OF INCORPORATE HINGS
- USE OF INTEGRAL SPRINGS
- USE OF SNAP FITS
- USE OF GUIDES BEARINGS
- USE OF COVERS
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Answer:
true
Explanation:
it is used to describe the family of transit services available to residents of urban area