A. Zinc, copper & nickel
B. Cobalt, chromium & tungsten
C. Zinc, aluminium & nickel
D. Nickel, cobalt & vanadium
Related Mcqs:
- Alloying elements present in Haynes stellite, which has superior performance than high speed steel, are____________________?
A. Nickel, cobalt & chromium
B. Tungsten, chromium & cobalt
C. Manganese, chromium & cobalt
D. Tungsten, molybdenum & nickel - Powder metallurgy technique is used in the production of ____________________ tools ?
A. Tungsten carbide
B. High carbon steel
C. High speed steel
D. Drilling - In TIG welding, thoriated tungsten electrodes are used, because it ____________________?
A. Has higher current carrying capacity
B. Has better electron emissivity
C. Is stronger than ordinary tungsten
D. Is easy to prepare - Pressure required to increase the density of water by about 1% is ____________________ atmosphere?
A. 10
B. 50
C. 200
D. 1000 - ____________________ are normally subjected to sub-zero treatment?
A. Highly stressed parts
B. Gauges or precision parts
C. Cold rolled sheets
D. Non machinable materials - ____________________ of hard alloy and tool steel is done to make it easily machinable ?
A. Case carburising
B. Tempering
C. Normalising
D. Annealing - One ton of refrigeration is not equivalent to the heat removal rate of ____________________?
A. 200 BTU/minute
B. 50 kcal/minute
C. 50 kJ/sec
D. 3.5 KW - In the diving apparatus, helium is used along with oxygen, because it is ____________________?
A. Easily available
B. Not soluble in blood at high pressure
C. Lighter than nitrogen
D. Completely miscible with oxygen - Addition of ____________________ to steel does not help in improving its machinability?
A. Sulphur
B. Silicon
C. Lead
D. Phosphorous - Blow off cock is provided in steam boiler to ____________________?
A. Guard the boiler in case of abnormal rise in steam pressure
B. Drain out water and sludge during its repair
C. Regulate the supply of water in boiler
D. Put out the fire in the furnace when the water level in the boiler falls to unsafe limit
