91. Corrosion prevention methods include:
A. Painting
B. Galvanization
C. Coating
D. All
Answer: D
92. Galvanization uses:
A. Copper
B. Zinc
C. Iron
D. Silver
Answer: B
93. Rust is chemically:
A. Fe₂O₃·xH₂O
B. FeO
C. Fe₃O₄
D. Fe
Answer: A
94. Passivation forms:
A. Protective layer
B. Gas
C. Liquid
D. Salt bridge
Answer: A
95. Electrochemical cell converts:
A. Electrical to chemical energy
B. Chemical to electrical energy
C. Heat to light
D. Sound to energy
Answer: B
96. Nernst equation involves:
A. Concentration
B. Temperature
C. Electrons
D. All
Answer: D
97. Increasing temperature affects EMF by:
A. Increasing or decreasing
B. No effect
C. Zero effect
D. Constant
Answer: A
98. Resistance increases with:
A. Length
B. Area
C. Temperature decrease
D. Conductivity
Answer: A
99. Conductance increases with:
A. Resistance
B. Area
C. Length
D. Temperature decrease
Answer: B
100. Electrolysis is used in:
A. Metal extraction
B. Refining
C. Electroplating
D. All
Answer: D