Question No:-31

Carbonate stress corrosion cracking usually occurs at welds or cold worked areas that __________.   1. Have been stressed relieved   2. Have not been stressed relieved   3. Have high residual stress   4. Have high-applied stress  View Answer Answer:-3. Have high residual stress

Question No:-32

Nitriding is usually confined to the surface of most components and will have a dull, ______ appearance. In more advanced stages, the material will exhibit very hard surface hardness.   1. Gray   2. Black   3. Brown   4. White  View Answer Answer:-1. Gray

Question No:-33

Carbon steel is susceptible to SCC when used in ___________ service.   1. Hydrogen   2. Ammonia   3. High temperature   4. High pressure  View Answer Answer:-2. Ammonia

Question No:-34

The grain size has an important influence on the high temperature ductility and on the reheat cracking susceptibility. A ________ grain size results in _______ ductile heat affected zones, making the material more susceptible to reheat cracking.   1. Large, More   2. Small, Less   3. Large, Less   4. Small, More  View Answer Answer:-3. Large, Less

Question No:-35

Equipment that is temper embrittled may be susceptible to _______ during start-up and shutdown.   1. Creep   2. Thermal fatigue   3. Brittle fracture   4. Stress fatigue  View Answer Answer:-3. Brittle fracture