III B.Tech II Semester Supplementary Examinations, April/May 2005 FOUNDRY TECHNOLOGY (Metallurgy & Material Technology) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ????? 1. (a) State and Explain the factors that determine the selection of a casting alloy and the casing process to be Employed. (b) What are the important sections of a Foundry? Briefly Explain the activities in each of the sections. 2. (a) Explain the importance of coal dust in the foundry sand. (b) What is the need of core-print. What considerations are to be looked into the calculation of core-print size. 3. (a) Discuss in detail the principle operation, advantages and limitations of CO2 process. (b) Is it possible to obtain a sound casting of a solid bar by centrifugal casting? Give reasons in support of your answer. (c) Explain why most die castings not made out of high strength materials. 4. Distinguish between pressurized and non-pressurized gating system used in foundry shop. Explain with ’suitable examples. 5. (a) Describe the important ways in which natural contraction of a casting on cooling might markedly affect it’s design. (b) Explain the major differences between an Embryo and Nucleus. Also explain what is the critical radius of a solidifying material. 6. (a) Why steel scrap is added in cupola and to what extent it can be accommodated in the cupola charge. (b) Enumerate the advantages of hot blast cupola over conventional cupola unit. 7. (a) Describe in detail about isocyanate process. (b) With a neat sketch explain the working principle of continuous casting of aluminium strips. 8. Explain the following casting defects: (a) (b) (c) (d)
Metal Penetration Core shift COLD SHUTS Pinhole porosity ????? 1 of 1
NR321803 III B.Tech II Semester Supplementary Examinations, April ...
(a) Why steel scrap is added in cupola and to what extent it can be accommodated in the cupola charge. (b) Enumerate the advantages of hot blast cupola over ...
3.a) Define a page fault. Explain various steps required to bring a desired page? b) Describe the process of segmentation? 4.a) What are the desirable ...
(b) Discuss and analyze about all the allocation strategies in run-time storage environment . 6. ... (a) Define Address Descriptor and Register Descriptor. (b) Why ...
b) Realize hybrid redundancy with triple modular redundancy core. 4.a) With an example explain the practical fault tolerant system? b) How do you enhance the ...
b) Derive an expression for the heat loss per square metre of the surface area for a · furnace wall when the thermal conductivity varies with temperature ...
With a brief note on decision functions, explain in detail about linear decision · functions. 2.a) Write a short note on cluster analysis. b) Explain a cluster-seeking ...
(b) Discuss briefly similarities and differences between FM and AM receivers. (c) Write in detail about the limiter used in FM receiver. 6. (a) Discuss the basic ...
LINEAR DIGITAL I.C. APPLICATIONS. ( Common to Electronics ... (a) Explain the operation of Monostable multivibrator using 555 timer. Derive the expression of ...
Calculate the internal shear flow for the multcell tube system subjected to a torsion of 10,000 N-cm, for 1 mm thick section ... BM of 120 N-m. The trace of the plane of loading is inclined at 450 to the V-V axis of the section. Locate the neutral ax
7. a) What is creep? Explain the effect of temperature and load on creep curves. b) Explain the various atomic mechanisms involved in deformation at high.
Inner radius Ra = 0.15m, outer radius Rb = 0.45m, Magnetic flux density. B0 = 1.2mW b/m2 i. Determine the Hull cut off voltage ii. Determine the cut off magnetic ...
0 (s)Q0(s), with P0(s) and Q0(s) rel- atively left prime and P0(s) row proper. Find the minimal realization. Determine the values of the controllability index and ...
(b) Pixel connectivity. (c) Distance measure. (d) Equivalence of pixels. 6. (a) Write a note on the following: i. image subtraction ii. image averaging. (b) Show that ...
(b) Distinguish between deterministic test pattern generation and probabilistic ... circuit by inserting addition control logic to the following function, obtain the.
(a) Apply the Bresenham's algorithm to turn up pixels along the line segment determined by points (5,7) and (12,11). (b) Give parametric equation of a line ...
error in the reading due to loading effect. 2. (a) Explain in detail the measurement of power using electrodynamometer. (b) Write short notes on watt-hour meter.