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DIPLOMA ENGINEERING – SEMESTER – IV-EXAMINATION – WINTER 2015
Subject Code: 3341906 Date: 11/12/2015
Subject Name: Plant Maintenance and Safety
Time: 02:30 PM TO 5:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 Answer any Seven out of Ten. 14
(1) List the methods for selection of replacement. 02
(2) Write any five types of maintenance. 02
(3) List any four methods of wear detection. 02
(4) Define wear. How it can be reduced? 02
(5) Define the term scheduling. 02
(6) What is fault tracing? 02
(7) List the different methods for degreasing. 02
(8) List the types of fault arising in a machine tool. 02
(9) List various types of hazards. 02
(10) Define the industrial accident. 02
Q.2 (a) Define the term maintenance. Write any three aims of maintenance engineering. 03
OR
(a) State the factors affecting maintenance cost. 03
(b) Explain mechanical wear. 03
OR
(b) State the causes of wear. 03
(c) State at least any seven real examples of wear occur. 04
OR
(c) Differentiate between Galvanic and Biological corrosion. 04
(d) Enlist types of lubricants and explain any one of them. 04
OR
(d) What is stress corrosion? How it can be reduced? 04
Q.3 (a) Draw a decision tree for the petrol engine fails to start. 03
OR
(a) Explain how the decision tree helpful in fault tracing? 03
.
(b) Give reason for noisy operation of a pump. 03
OR
(b) Give reasons for increased fuel consumption of an engine. 03
(c) Define and state use of repair complexity. 04
OR
(c) State the rules for assembly and disassembly. 04
(d) Explain the need of preventive maintenance in industry. 04
OR
(d) Give the details for maintaining a pump. 04
Q.4 (a) Explain VEIN analysis. 03
.
OR
(a) Explain the relation between safety and inspection. 03
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(b) State the responsibilities of boiler inspector. 04
OR
(b) What safety precautions are necessary for lathe machine operation? 04
(c) State the advantages and limitations of welding as recovery method. 07
Q.5 (a) Define the term grouting and list the equipment used in erection work. 04
(b) List the responsibilities of maintenance department. 04
(c) List the materials used in foundation. 03
(d) State six types of foundation bolts used in practice. 03
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