Tumbling is a finishing procedure aimed at enhancing the ________________ of parts or materials ?
Show answer Hide answer
Answer: D. Surface cleanliness
Explanation
Tumbling processes effectively remove surface contaminants, oil, and grease to enhance overall component cleanliness. Barrel finishing rubs parts against abrasive media and cleaning compounds to scrub away unwanted surface debris. Surface cleanliness improves significantly as tumbling actions scour away residual manufacturing soils and oxides. Tumbling or barrel finishing is a bulk surface treatment technique performed inside rotating or vibrating containers. Parts, abrasive chips, compounds, and water are mixed together to process thousands of small metal components simultaneously. Mechanical friction and chemical action combine to clean, deburr, and polish manufactured components efficiently.
Automotive and aerospace manufacturers use tumbling to clean stamped and machined metal parts prior to plating. Mass finishing techniques reduce labor costs significantly compared to manual deburring and cleaning operations. Clean metal surfaces are essential for ensuring proper adhesion during subsequent painting and coating processes. Tumbling modifies surface finish texture rather than directly increasing the fatigue limit of structural metallic parts. Creep limit properties depend on alloy composition and temperature rather than mechanical barrel tumbling treatments. Stating the primary aim is surface finish misses the specific focus on cleaning, though finish is also affected.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. Achieving even sand packing during green sand molding results in____________________?
Show answer Hide answer
Answer: B. Greater dimensional stability of the casting
Even sand packing in green sand molding ensures consistent mold density and dimensional stability. Uniform density prevents uneven mold wall yielding when molten metal fills the cavity. Castings maintain precise geometri...
Q2. The critical value of which parameter determines the shift from laminar to turbulent regime in free convection heat transfer?
Show answer Hide answer
Answer: D. Grashoff number & Prandtl number
In free convection, transition from laminar to turbulent flow is determined by the Rayleigh number. The Rayleigh number is mathematically defined as the product of the Grashoff number and Prandtl number. Both buoyancy ef...
Q3. Solutions A1 and A2 possess respective pH levels of 2 and 6, which indicates that the solution ?
Show answer Hide answer
Answer: D. Both B. & C.
A pH level of two represents a strongly acidic solution, confirming the descriptive statements about acidity accurately. A pH level of six indicates a weakly acidic solution, meaning both descriptive statements regarding...
Q4. Adding insulation up to the critical radius will cause the heat loss to____________________?
Show answer Hide answer
Answer: B. Decrease heat loss and will have no effect beyond that
Adding insulation up to the critical radius increases total heat loss due to expanding outer surface areas. Beyond the critical radius threshold, adding extra insulation successfully decreases heat loss as conduction res...
Q5. A venturimeter determines fluid flow rates in pipes when the setup is oriented in a ______________ position ?
Show answer Hide answer
Answer: D. Any
A venturimeter calculates fluid flow rates based on differential pressure measurements across a converging section. The fundamental Bernoulli equation governing its operation accounts for elevation changes in any pipe or...
Q6. Molten aluminum alloys receive an addition of titanium prior to casting in order to achieve_____________________?
Show answer Hide answer
Answer: D. Improving fluidity
Titanium or boron additions to molten aluminum alloys act as grain refiners during solidification.