A. Silicon carbide
B. Corundum
C. Aluminium oxide
D. Boron carbide
Related Mcqs:
- The softness or hardness of a grinding wheel depends upon the type & amount of bonding material used. For general purpose cutter grinding _______________ grinding wheel is normally used ?
A. Hard
B. Soft
C. Silicon carbide
D. Aluminium oxide - For grinding of softer materials, the grinding wheel should have _________________ grain size ?
A. Finer
B. Coarser
C. Medium
D. Any type of - A cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson’s ratio of the rod is___________________?
A. 0
B. 0.33
C. 0.44
D. 0.25 - Which of the following has the least value of ultimate tensile strength (UTS) ?
A. Medium carbon steel
B. High carbon steel
C. Cast iron
D. Wrought iron - With increasing carbon percent in steel beyond 0.8%, its ultimate tensile strength (UTS) and _____________ is not affected ?
A. Impact strength
B. Percent elongation
C. Hardness
D. Both B & C - Principal alloying elements of cast tool alloys which have very high wear resistance & high temperature strength are ?
A. Cobalt, chromium & tungsten
B. Cobalt, chromium & nickel
C. Molybdenum, tungsten & chromium
D. Cobalt, zirconium & molybdenum - Which of the following material handling equipments is not suitable for moving materials in varying paths ?
A. Hand trolley
B. Belt conveyor
C. Crane
D. Truck - Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than ?
A. 5
B. 10
C. 20
D. 35 - The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the ‘Curie temperature’. Its value for cobalt is ______________ °C?
A. 768
B. 1127
C. 1359
D. 1480 - A dense structure of grinding wheel is not used for the_____________________?
A. Ductile material
B. Hard materials
C. Brittle materials
D. Finishing cuts
