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Code : 9ME-34 Register Number

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III

Semester Diploma Examination, ApriVMay -2016

Time:3Hoursl

I

l. (a)

Fill in the blanks : measured quantity.

Plain plug gauges are generally used for checking the

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(ii)

is the fit established when a positive, clearance exist between

(iii)

hole and shaft.

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(iv) device is used for measurement (v) Quartz is a material. (b)

- II, III & IV.

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(i) Section -l is compulsory. (ii) Answer any two full questions each from Sections

Mar Marks : 100

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Note:

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MECHANICAL MEASUREMENTS AND METROLOGY

a

of humidity.

What are the uses of comparators ?

)

Explain systematic error and random error.

I I

List the factors while selecting measuring instrument

f,

Explain with block diagram generalized measuring systern.

w (a) (b) (c)

With

a neat diagram

explain screw thread micrometer

6

With.a neat sketch explain the working of mechanical reed type comparator.

5

State the advantages and disadvantages of electrical compar€tor.

4

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(a) O) (c)

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SECTION.II

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4. (a) Explain with sketch shaft basis systern. O) What is Tolerance ? Explain types of Tolerance system. (c) Write a note on interchangeability.

6 4

[Turn over

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eME-34

(a)

Explain with neat diagram checking of run out of axis of centre in lathe.

6

(b)

Explain with sketch vertical straightness of knee of milling machine.

5

(c)

List the various testing instruments for machine tools alignment testing.

4

S

4

Explain the workingof Mcleod pressure gauge with sketch.

(a)

.. ring. '(b) With a neat sketch explain working of proving (c)

6 5

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7.

6

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6. (a) Explain Piezo electric transducer with a neat sketch. (b) Explain with a neat diagram of a two element rosette shain gauge. (c) State the requirernorts of transducer.

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s.

SECTION.III

What is Tachometer ? Write classification of Tachometer.

4

SECTION.IV

Explain with sketch the working of float and cone rotometer.

I

What are the advantages of resistance thermometer

4

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6

?

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(a) Sketch and explain hydrometer. (b) Explain sight glass for liquid level measurernent. (c) What are advantages and disadvantages of LVDT ? Write short notes on any three of the following:

(a) Hair Hygrometer O) Feeler gauge (c) Eddy current Tachometer (d) Co-ordinate measuring machine (e) Hydraulicdynamometer

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3x5=15

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10.

rlrelnh the the working,of rvnrlrinc n optical pyrometer. Explain with sketch

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9.

(a) O) (c)

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8.

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