Worksheetsmetrology
Total questions: 30
Worksheet time: 15mins
Which of the following is the most important characteristics of a measuring instrument in general?
Precision
Accuracy
Repeatability
Sensitivity
Readability
Systematic errors are
Randomly distributed
Regularly repetitive in nature
Distributed on both positive and negative sides of mean value
Unknown errors
Unpredictable in nature
Tolerances are specified
to obtain desired fits
because it is not possible to manufacture a size exactly
to obtain high accuracy
to have proper allowance
to have proper inspection
Light year is a measurement of
Speed of Aeroplanes
Speed of light
Stellar distance
Speed of rockets
Name the instrument used to measure the relative humidity
Hydrometer
Hygrometer
Barometer
Mercury thermometer
The following is a line standard of measurement
Measuring tape
Slip gauge
Micrometer
End bars
The purpose of ratchet screw in micrometer screw gauge is
To lock a dimension
To impart blow motion
To maintain sufficient and uniform measuring pressure
To take care of wear of screw threads
To allow zero adjustment
The advantage of vernier caliper over micrometer is that it
It is easier and quicker to use
It is more accurate
It can be used to make both inside and outside measurements over a range of sizes
All of the above
The term traceability in Metrology is concerned with
Measuring machines
Optical instruments
Pneumatic comparator
Standards
Limits and fits
In selective assembly
Parts in an assembly can be replaced by a similar part without any further alteration
Parts are produced on hole basis system
All the parts are always interchangeable
The size of one of the components is measured accurately and then mating component is made to match with this
The parts of any one type are classified into several groups according to size
The following type of gauges has gauging sections combined on one end
Combination gauge
Limit gauge
GO and NO - GO gauge
Fixed gauge
Progressive gauge
Which of the following is not the accessory of slip gauges?
Scribing and centre points
Measuring jaws
Holder
Calipers
Base
Which of the following methods is not used for testing straightness?
Spirit level method
Autocollimator
Interference method
Beam comparator
Laser
Clinometer is related with
Engineer's parallels
Angle gauges
Spirit level
Bevel protractor
Tolerance
If the fringe pattern on an optical flat is as shown, the surface under flat would be
Perfectly flat
Cylindrical
Spherical
Ridge or Valley
Convex
The angles of angle gauges in the degrees series are
1,3,9,25,42
1,3,9,27,81
1,3,9,27,41
1,5,10,25,45
2,3,5,27,41
According to Taylor's principle, NO - GO gauge checks
Only one feature at a time
Only important dimensions at a time
All the dimensions at a time
Only the related dimensions at a time
As many dimensions as possible at a time
In interferometric methods, the path difference between one bright band and the next is varied by
Half wave length
Two half wave lengths
One quarter wavelength
Two wavelengths
None of the above
Gear tooth vernier is used to measure
Gear tooth profile
Gear tooth thickness
Pitch line thickness of gear tooth
Module
Addendum and dedendum
Pick up the correct statement in connection with surface finish
Pitch of secondary texture is same as pitch of primary texture
Pitch of secondary texture is more than pitch of primary texture
Pitch of secondary texture is less than pitch of primary texture
Pitch of primary and secondary texture can't have any relationship
Pitch of primary and secondary textures is related mathematically
Match the following group 1 and group 2 elements
Group 1
- Flaw
- Actual surface
- Nominal surface
- Waviness
- Roughness
Group 2
A. Secondary texture
B. Surface which does not exist
C. Primary texture
D. Designer prescribes the surface
E. Irregularities occurring at one place
1 - A, 2 - B, 3 - D, 4 - C, 5 - E
1 - D, 2 - E, 3 - D, 4 - C, 5 - C
1 - E, 2 - D, 3 - B, 4 - A, 5 - C
1 - C, 2 - A, 3 - D, 4 - B, 5 - E
A feeler gauge is used to check
Radius
Screw pitch
Surface roughness
Unsymmetrical shape
Thickness of clearance
The thread micrometer measures
The major diameter of the thread
The minor diameter of the thread
The effective diameter of the thread
The root diameter of the thread
All the diameters of the thread
All the thread characteristics can be measured precisely with
Screw pitch gauge
Micrometer with V-anvil
Tool room microscope
Thread gauge
Thread measuring machine
Which of the following statement is true for force?
Force is a scalar quantity
Force is a vector quantity
Force is a dimensionless quantity
None of the mentioned
___________ is used for measuring torque in rotating parts in machines
Accelerometer
Dynamometer
Tachometer
None of the mentioned
The pitot tube is used to measure
Velocity at stagnation point
Stagnation pressure
Static pressure
Dynamic pressure
A Rotameter is a device used to measure
Velocity of fluid in pipes
Velocity of gauges
Vortex flow
Flow of fluids
Density of fluids
Which of the following is true for bimetallic type thermometer?
Two metals have same temperature coefficients
Two metals have different temperature coefficient
One metal is cooled always
None of the mentioned
When calibrating an instrument, you may detect the presence of hysteresis error by
Comparing the instrument against a known standard that is free from any hysteresis
Comparing accuracy at certain points both going up and down the calibration scale
Measuring error before and after turning the “deadband” adjustment screw
Checking for calibration drift at certain points over long periods of time
Shaking the instrument and listening for the rattling sound of loose parts
