Foundry crucible is made of_________________?
Foundry crucible is made of_________________?
A. mild steel
B. german silver
C. lead
D. cast iron
E. graphite
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The surface hardness of the following order is achieved by nitriding operation__________________?
The surface hardness of the following order is achieved by nitriding operation__________________?A. 600 VPN
B. 1500 VPN
C. 1000 to 1100 VPN
D. 250 VPN
E. 2000 VPNChilled cast iron has____________________?
Chilled cast iron has____________________?A. no graphite
B. a very high percentage of graphite
C. a low percentage of graphite
D. graphite as its basic constituent of composition
E. none of the above is trueIron-carbon alloys containing 1.7 to 4.3% carbon are known as
Question: Iron-carbon alloys containing 1.7 to 4.3% carbon are known as
[A].eutectic cast irons [B].
hypo-eutectic cast irons [C].
hyper-eutectic cast irons [D].
none of these Answer: Option B
Explanation:
No answer description available for this question.
Addition of silicon to aluminium results in____________________?
Addition of silicon to aluminium results in____________________?A. improvement of casting characteristics
B. improvement of corrosion resistance
C. one of the best known age and precipitation-hardening systems
D. improving machinability
E. none of the aboveAccording to Indian standard specifications, a plain carbon steel designated by 40 C8 means that the carbon content is
Question: According to Indian standard specifications, a plain carbon steel designated by 40 C8 means that the carbon content is
[A].0.04% [B].
0.35 to 0.45% [C].
0.4 to 0.6% [D].
0.6 to 0.8% Answer: Option B
Explanation:
No answer description available for this question.
Malleability of a material can be defined as ______________________?
Malleability of a material can be defined as ______________________?A. ability to undergo large permanent deformations in compression
B. ability to recover its original form
C. ability to undergo large permanent deformations in tension
D. all of the above
E. none of the above