A. Cathodic protection
B. Anodic protection
C. Usage of largest possible anodic area
D. Any one of these
Related Mcqs:
- Which of the following is an example of stress corrosion ?
A. Season cracking of brass
B. Caustic embrittlement of steel
C. Both A. & B.
D. Neither A. nor (B) - Which of the following is an example of cathodic protection of metals against corrosion ?
A. Painted steel
B. Galvanised iron
C. Case hardened steel
D. Lead lined reactor - Leakage in a cooking gas cylinder is detected by___________________?
A. Radio-isotopes
B. Pouring soap solution on the surface and locating the gas bubbles
C. Halide torch
D. Pungent smell of mercaptans present in the gas - Gibbs phase rule finds application, when heat transfer occurs by___________________?
A. Conduction
B. Convection
C. Radiation
D. Condensation - In the ammonia synthesis reaction, N2 + 3H2 ⇌ 2NH3 + 22.4 kcal, the formation of NH3 will be favoured by___________________?
A. High temperature
B. Low pressure
C. Low temperature only
D. Both low temperature and high pressure - ______________ cannot control the noise pollution ?
A. Use of silencers
B. Green house gases
C. Vibration damping
D. Tree plantation - Which of the following processes cannot be made reversible even under ideal condition of operation ?
A. Free expansion of a gas
B. Compression of air in a compressor
C. Expansion of steam in a turbine
D. All (A), B. & (C) - The equilibria relations in a multi-component and multiphase system cannot be calculated with the help of the_______________?
A. Phase rule
B. Experimental data
C. Empirical equations
D. Theoretical equations - Which of the following is not an extensive property ?
A. Free energy
B. Entropy
C. Refractive index
D. None of these - During Joule-Thomson expansion of gases_________________?
A. Enthalpy remains constant
B. Entropy remains constant
C. Temperature remains constant
D. None of these
