The process of leveling a distorted sheet metal is designated as____________________?
Show answer Hide answer
Answer: C. planishing
Explanation
Planishing is a metalworking process that smooths and levels distorted sheet metal surfaces. Light hammer blows or specialized rollers eliminate localized buckles and surface imperfections. Cold working during planishing improves surface finish and local dimensional accuracy. Sheet metal distortion often occurs during welding, stamping, or thermal cutting operations. Planishing stretches the metal slightly in localized areas to match surrounding material dimensions. Skilled technicians use specialized hand dollies and hammers to restore panel contours.
Automotive restoration specialists use planishing hammers to smooth out body panels after welding. Aerospace manufacturing requires precise sheet metal leveling to maintain aerodynamic fuselage profiles. Metal art fabrication relies on planishing techniques to achieve flawless, polished surface finishes. Squeezing operations involve compressive bulk deformation rather than surface leveling of thin sheets. Coining applies extreme pressure in closed dies to impart fine details and coin surface reliefs. Drawing pulls sheet metal into a die cavity to form three-dimensional hollow cup shapes.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. According to Dalton’s Law, the total pressure exerted by a gas mixture equals________________?
Show answer Hide answer
Answer: C. sum of the partial pressures of all
Dalton’s Law establishes the fundamental behavior of ideal gas mixtures in physics. The total pressure exerted equals the mathematical sum of individual partial pressures. Each gas contributes to the total pressure indep...
Q2. The analytical technique used to determine the optimal utilization of constrained resources is called___________________?
Show answer Hide answer
Answer: B. linear programming
Linear programming is a mathematical optimization technique used to allocate limited resources effectively. It maximizes or minimizes a linear objective function subject to several resource constraints. This analytical m...
Q3. A milestone chart serves the purpose of_______________________?
Show answer Hide answer
Answer: E. none of the above
A milestone chart tracks significant project events and target completion dates. It focuses primarily on scheduling major deliverables rather than complex task dependencies. Therefore it fails to fulfill the specific fun...
Q4. In an open-cycle gas turbine featuring an exhaust heat exchanger, the atmospheric air prior to compressor entry is____________________?
Show answer Hide answer
Answer: B. compressed air before entering the combustion chamber is heated
In an open cycle gas turbine featuring a heat exchanger, compressed air is preheated. Exhaust gases transfer thermal energy to the compressed air before it enters the combustion chamber. Preheating the air reduces the fu...
Q5. Cork functions as an effective thermal insulator due to its___________________?
Show answer Hide answer
Answer: D. porous body
Cork functions as an effective thermal insulator due to its porous cellular structure. Microscopic air pockets trapped within the cellular matrix restrict heat transfer. This specialized porous body minimizes conductive...
Q6. The total emissivity of polished silver when contrasted with a theoretical black body is___________________?
Show answer Hide answer
Answer: D. very much lower
Polished silver has a very low total emissivity compared to a theoretical black body. Highly polished metallic surfaces reflect thermal radiation rather than emitting it efficiently. Consequently, its radiant energy outp...