Maharashtra State Board of Technical Education 2008 Diploma Mechanical Engineering (metrology and quality control ) - Question Paper

Sample ques. Paper-I
Course Name : Mechanical and Production Engineering / Production Technology
Course Code : ME/PT/PG/MH/MI
Semester : Fifth
Subject : Metrology and Quality Control
Marks : 80 Time: three Hours

Instructions:
1. All ques. are compulsory.
2. Illustrate your answers with neat sketches wherever necessary.
3. Figures to the right indicate full marks.
4. presume suitable data if necessary.
5. Preferably, write the answers in sequential order.

Q.1. Solve any 4 of the subsequent. (4x4=16)
a) describe the terms precision and accuracy with suitable example.
b) Differentiate ranging from ‘line standard’ and ‘End standard’.
c) elaborate pitch errors? discuss causes and effects of pitch errors in threaded components.
d) describe CLA and RMS values as applied to surface roughness measurement.
e) describe appraisal cost, prevention cost, failure cost and optimum cost applied to quality
control.
f) What is S.Q.C.? State it’s objectives.

Q.2. Solve any 2 of the subsequent. (6x2=12)
a) discuss with neat sketch construction & working of Dial indicator.
b) provide the working principle of floating carriage dial micrometer with neat sketch.
c) What is the task of S.Q.C.? elaborate the statistical tools available?

Q.3. Solve any 3 of the subsequent (4x3=12)
a) An angle of 350,12’, 12’’ is to be measured using subsequent standard set of angle gauges
[10,30,90,270,410] [1’,3’,9’,27’] [3’’,6’’,18”30”].Sketch the arrangement with minimum
number of gauges.
b) Draw a neat sketch of metric screw thread profile showing all the parameters.
c) define any 1 method to measure gear tooth thickness.
d) How the surface finish is designated on the drawing for a ground surface.
9097

Q.4. Solve any 2 of the subsequent (8x2=16)
a) i) Differentiate ranging from Hole base system and Shaft base system.
ii) define Taylor’s principle for design of limit gauges.
b) What is TQM? State it’s objective & tools.
c) The values of sigma x bar = 3569.2 & sigma R=196 are for a process for 20 subgroups with subgroup
size of 5.
(i) Determine the control limits of x bar and R charts.
(ii) Draw the x bar chart.
For subgroup size 5, A2=0.58, D3=0, D4=2.11

Q.5. Solve any 3 of the subsequent (4x3=12)
a) What geometric features are important for the subsequent applications giving definitions
i) surface plate ii) axis of spindle with surface table of vertical drilling machine
b) What is the effect of excessive run-out of spindle axis?
c) Comment on quality of design with suitable example.
d) define double sampling plan.

Q.6. Solve any 3 of the subsequent (4x3=12)
a) elaborate outstanding features of ISO-9000?
b) What do you mean by 6 sigma? define with suitable example.
c) What is an O.C. curve? Draw ideal and true O.C. curve.
d) Name the control charts for variables and attributes. provide suitable example of every.

Earning:   Approval pending.