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WorksheetsMetrology III
Total questions: 25
Worksheet time: 13mins
The case with which observations can be made accurately is called
Readability
Sensitivity
accuracy
repeatability
Autocollimator is used for
parallelism measurement
straightness measurement
flatness measurement
angular measurement
Match the following Group 1 items (Grades) with Group 2 items (application) and select the correct option
1. Grade I ----------------------------------- A. high precision task
2. Grade II ---------------------------------- B. comparators
3. Grade 00 --------------------------------- C. inspection department
4. Calibration grade ----------------------- D. production
1-A, 2-C, 3-D, 4-B
1-C, 2-D, 3-A, 4-B
1-B, 2-A, 3-C, 4-D
1-D, 2-B, 3-A, 4-C
Which of the following statements are true?
1. Mechanical comparators are compact and easy to handle
2. Parallax error is never observed in mechanical comparator
3. Sigma comparator is a type of mechanical comparator
4. Mechanical comparators have low inertia which makes them sensitive to vibrations
1 and 2
3 and 4
1 and 3
All of the above
V-block is used in the workshop to check
roundness of cylindrical work
surface roughness
taper on job
none of these
The following type of gauges has gauging sections combined on one end
combination gauge
limit gauge
go and no go gauge
progressive gauge
A comparator for its working depends on
accurately calibrated scale
comparison with standard such as slip gauges
accurate micrometer gauge
optical device
The figure shows the measurement of
roundness
radius of curvature
cylindricity
flatness
Surface roughness on a drawing is represented by
triangles
circle
square
lines
Accurate centering of work mounted in an independent chunk can be determined by using a
center gauge
height gauge
dial indicator
surface gauge
Basic shaft and basic hole are those whose upper deviations and lower deviations respectively are
+ve, -ve
+ve, +ve
-ve, -ve
zero,zero
For grade IT 7, value of tolerance is equal to
8i
10i
16i
24i
Clinometer is related with
Engineer's parallels
angle gauges
spirit level
bevel protractor
The essential condition for inter -ferometry measurement is
an air gap of varying thickness must exist between the two surfaces
an optical flat is required
work surface must be reflective
monochromatic source of light is used
All of these
Combination set can be used to
check angular surfaces
draw circles and arcs
scribe lines
all of these
Measuring instrument intended to define or present physically, conserve or reproduce the unit of measurement of a quantity (or a multiple or sub-multiple of that unit) and to transfer it to other measuring instruments by comparison is known as
Legal measuring standard
Standard
Working standard
Primary standard
What is the importance of the valley in any irregular surface?
Reduce metal to metal contact
Retain film of lubricating oil
Reduce stress concentration
Improve surface texture
Which of the following is not true about first order irregularities?
Arising due to irregularities in machine tool itself
Arising due to weight of material itself
Arise due to vibrations
May arises due to deformation of work under action
Under which group, does waviness in surface falls?
Primary texture
Secondary texture
Tertiary texture
Quaternary texture
What precise movement does CMM have?
Precise movement in x coordinate
Precise movement in x and y coordinates
Precise movement in y and z coordinates
Precise movement in x, y and z coordinates
How many measurement parameters are considered in checking axes accuracy of straightness in CMM?
2
4
6
8
Which of the following is provided in dial gauge to raise the plunger?
A finger lever
Probe
Spring
A pointer
Which of the following is a problem in using dial gauges?
Gauge wear
Effect of temperature variation
Economy
Oscillation in the pointer
Which of the following parameter is important for specifying surface roughness?
Size of irregularity
Spacing of irregularity
Height of irregularities
Height, spacing and form of irregularities
From which category ‘Sigma comparator’ belongs?
Optical comparator
Mechanical comparator
Mechanical-optical comparator
Pneumatic comparator
