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WorksheetsMETROLOGY AND MEASUREMENT
Total questions: 50
Worksheet time: 8mins
What is the relation between variation due to observation, manufacturing process and measuring process of a product?
σobservation = σprocess + σmeasurement
σobservation = σprocess – σmeasurement
σobservation = σprocess * σmeasurement
σobservation = σprocess / σmeasurement
Which of the following is used to check change in ocular lines position due to column rotation in universal micrometer?
Dial indicator
Slip gauges
Control shaft
Universal microscope
Error of measurement =
True value – Measured value
Precision – True value
Measured value – Precision
None of the above
Which of the following instrument is of the highest accuracy?
Digital length gauge
Inside micrometer
Universal measuring instrument
Universal height micrometer
A universal measuring instrument can withstand up to which temperature for correct reading?
100oC
75oC
65oC
50oC
Which of the following is not a name of slip gauges?
Gauge Blocks
Johannsen Gauges
Gage Blocks
Linear Gauges
How many grades or classes of slip gauges are present?
3
5
6
4
Which of the following is used for manufacturing of length bars?
Hardened steel
High carbon high chromium steel
Tungsten carbide
Ceramic
Which of the following is not the most important feature of slip gauge?
Length between measuring surface
Flatness
Surface conditions of measuring surface
Adhereness efficiency
What is the effect of improper alignment of each tooth?
Tooth thickness increases
Face width decreases
Load will not distributed evenly
Pitch of teeth reduced
Measuring mechanism whose mobile component attains its equilibrium position without oscillations round new position is called
Damped mea,suring mechanism
Aperiodic measuring mechanism
Stable measuring mechanism
Precise measuring mechanism
Which of the following is not a fundamental quantity?
length
angle
time
luminous intensity
Which standard is fixed and used for industrial laboratories?
international standard
primary standard
secondary standard
working standard
Which of the following option is true for given statements about gear measurement?
Statement 1: There is no effect of cutter accuracy on the accuracy of gear.
Statement 2: Accuracy of individual elements is necessary for precision gears.
T, F
F, F
T, T
F, T
Which of the following is the best for the examination of surface finish?
Touch inspection
Visual inspection
Scratch inspection
Microscopic inspection
Which of the following material is not used for rubbing on the surface to be inspected in scratch inspection?
Softer material
Hard material
Plastic
Lead babbitt
What is the limitation of microscopic inspection to check surface finish?
An average value is needed
Small portion of surface can be detected at a time
A master finish surface is also needed
It is necessary to inspect whole surface together
In case of vertical illumination in measuring surface finish with surface photographs, which will appear as bright area?
Flat portion
Scratch
Irregularity
Hills
Which of the following is a destructive method in measuring surface finish?
Gloss measurement
Taper sectioning
Diffraction technique
Micro interferometer
Which of the following is the difference between test indicator and dial indicator?
Test indicator has lever type contacts
Dial indicator is lighter than test indicator
Dial indicator is smaller than test indicator
Stylus is present in dial indicator but not in test indicator
What is the range of measurement in a single setting of internal dial gauge with scale division value of 0.002 mm?
±0.06 mm
±0.02 mm
±0.01 mm
±0.1 mm
Upto which depth dial caliper gauge can reach ?
60 mm
80mm
20mm
10mm
How many tolerance pointers are provided on the scale of passmeter?
1
2
3
4
How many contacts are present in internal dial gauges?
1 which is fixed
2, one fixed and other movable
3, two fixed and one movable
4, two fixed and two movable
What is the actual deviation?
Algebraic sum between actual size and corresponding basic size
Algebraic difference between actual and corresponding basic size
Average of actual and basic size
Algebraic difference between upper and lower deviation
What is axial play ?
Freedom of spindle movement in axial direction
Freedom of spindle movement perpendicular to axial direction
Freedom of spindle movement in direction of cutting forces
Freedom of spindle movement in horizontal direction
Which of the following is not used in testing the pitch accuracy of lead screw?
A negative stop
Slip gauge
Length bars
Dial gauge
Which gauges are present in the first series (degree) of angle gauges?
5°, 10°, 15°, 25° and 40°
1°, 3°, 9°, 27° and 41°
1°, 5°, 9°, 25° and 45°
5°, 10°, 15°, 30° and 45°
What are the two grades of angle gauges?
Master and tool room
Precise and Normal
Standard and Industrial
High and low
Which of the following is incorrect about micrometer?
Thimble and barrel should have a dull finish
Total travel of the measuring spindle is called measuring range
Graduated surface diameter of barrel should be 5 mm
Screw has 10 or 20 threads per cm
Which of the following is not a name of the major diameter of an external thread?
Outside diameter
Crest diameter
Full diameter
Cone diameter
Which of the following is not correct when minor and major diameter have errors?
Will cause interference between mating parts
Flank contact increases
Less root section
Less wall thickness
Which of the following is not related to the drunken thread?
Periodic pitch error
Erratic pitch error
Progressive pitch error
Irregular pitch error
Why Wide tolerance on core diameter of internal threads is given?
To prevent binding at the root of the tap
To prevent binding at the crest of the tap
To prevent binding at the flank of the tap
To prevent binding at the face of the tap
What is the alternate name of amplitude grating?
Ronchi ruling
Prismatic grating
Phase grating
Index grating
What is the length of Prismatic grating?
500 mm
400 mm
300 mm
200 mm
For bi-directional fringe counting, how many detectors are placed for better balance?
3
4
5
6
Up to which accuracy length can be measured by laser interferometer?
1 part in 108
2 part in 108
1 part in 106
2 part in 106
What is the main use of steel cube reflector in autocollimator?
To provide a 90 degree standard in 3 planes
For general bench use
Calibrate surface plate
For setting but not checking perpendiculars
What is the alternate name of constant deviation prism?
Optical square
Dowell prism
Circular prism
Reflector prism
What is the angle between the two surfaces of an angle plate?
45 degree
120 degree
90 degree
180 degree
How many faces are there in multipurpose angle plate?
About 50 faces
About 40 faces
About 30 faces
About 10 faces
How many pins are used in the method of determination of an angle of a dovetail?
1
2
3
4
What is the shape of tails and pins in an internal dovetail joint?
Circle
Square
Rectangle
Trapezoidal
Which of the following is used to measure the distance across the pins when included angle of the dovetail is determining by using pins?
Vernier
Micrometer
Screw gauge
Slip gauge
Which of the following method is used for the determination of flatness when the surface is irregular?
Half grid method
Grid method
Contact method
Non contact method
What are the requirements for the measurement of flatness using light?
Monochromatic light and a pair of optical flats
Dichromatic light and sets of optical flats
White light and a pair of optical flats
Monochromatic light and sets of optical flats
What is the range of the diameter of optical flats used in testing the flatness?
25mm to 300mm
1mm to 100mm
50mm to 500mm
1mm to 10mm
Which light is preferred if three dimensional features are being inspected?
Front lighting
Side lighting
Backlighting
Any lighting is suited
Which of the following option is correct for velocity type pneumatic gauge?
Operate by sensing momentary rate of flow of air
Response speed is less than back pressure type
Low amplification
Filter is placed after pressure reducing unit
