Hiried Engineering Methodology Multiple choice Questions and Answers pdf

121.    Newall system of limits and fits is the oldest system working on hole basis system. The grades of holes and shafts specified respectively are
(a) 2, 6
(b) 1, 8
(c) 4, 12
(d) 6, 20
(e) 8,26.

122.    ISA tolerance system consists of following numbers of qualities of tolerance, and grades of fit respectively
(a) 6, 15
(b) 8, 20
(c) 12, 21
(d) 16, 21
(e) 21, 26.

123.    Expressing a dimension as 25.3* °05 mm is the case of
(a)    unilateral tolerance
(b)    bilateral tolerance
(c)    limiting dimensions
(d)    all of the above
(e)    none of the above.

124.    Surface roughness on a drawing is represented by
(a) triangles
(b) circles
(c) squares
(d) rectangles
(e) none of the above.

125.    Expressing a dimension as 32.5/32.3 mm is the case of
(a)    unilateral tolerance
(b)    bilateral tolerance
(c)    limiting dimension
(d)    all of the above
(e)    none of the above.

126.    A bore of 14.67 mm in a workpiece can be measured by
(a)     steel rule
(b)     vernier caliper
(c)    pneumatic gauge
(d)    micrometer
(e)    plug gauge.

127.    Tomlinson recorder is associated with measurement of
(a)    surface flaws
(b)    surface perpendicularity
(c)    surface finish
(d)    surface curvature
(e)    surface flatness.

128.    Which of the following methods is not concerned with surface finish measurement
(a)    spectrophotometry method
(b)    ultrasonic method
(c)    field emission method
(d)    critical angle of attack method
(e)    Talysurf principle.

130.    The diameter of finish turned shaft can best be checked with a
(a)    combination set
(b)    slip gauge   
(c)     height gauge
(d)    micrometer screw gauge
(e)    dial indicator.

131.    A photo-electric device in which the resistance of the metal changes directly proportional to the light striking on it, is known as
(a)    photo-cell
(b)    photo-emission cell
(c)    photo-voltaic cell
(d)    photo conductive cell
(e)    none of the above.

132.    Universal surface gauge is used for
(a)     checking straightness
(b)    checking flatness
(c)    checking parallelism
(d)    layout work and inspection
(e)    checking the surface finish.

133.  The only natural material producing a spectral line (6440° A red) almost completely symmetrical is
(a) Cadmium    
(b) Mercury
(c) Krypton
(d) Helium
(e) Neon.

134.    Accurate centring of work mounted in an independent chuck can be determined by using a
(a) centre gauge
(b) height gauge
(c) dial indicator
(d) surface gauge
(e) micrometer.

135.    In limits and fits system, basic shaft system is one whose
(a)    lower deviation is zero
(b)    upper deviation is zero
(c)    minimum clearance is zero
(d)    maximum clearance is zero
(e)    standard tolerance is zero.

136.    Which of the following is not the angle measuring device
(a)     angle plate  
(b)     sine bar
(c)    bevel protector
(d)    angle gauge
(e)    combination square.

137.    To check the diameter of a twist drill with a micrometer, the measurement must be taken across the
(a)    margins of the drill
(b)    flutes of the drill
(c)    cutting edges of the drill
(d)    lips of the drill
(e)    web of the drill.

138.    Pick out the wrong statement about gauges for internal threads.
(a)    The Go screw plug gauge is made to the minimum metal limit and of full form and checks the virtual effective diameter. Any error in the pitch or flank angle of screw affects the effec-tive diameter
(b)    The minimum limit of the major diameter and maximum size of the effective diameter are also checked.
(c)    Not Go screw plug gauge is made to the maximum effective diameter of the screw thread cleared at the root and crest.
(d)    The plain Go and Not Go gauges are used for checking the limits of the size of minor diameter.
(e)    The dimensions of Go and Not Go gauges correspond to maximum and minimum minor diameters.

139.    Expressing a dimension as 3^°o!o2 mm is the case of
(a)    unilateral tolerance
(b)    bilateral tolerance
(c)    limiting dimensions
(d)    all of the above
(e)    none of the above.

140.    In instrumentation a correction is
(a)    an error
(b)    the revision applied to the indicated value so that the final result obtained improves the worth of the result
(c)    reading-error
(d)    range of error-degree of correctness
(e)    lowest value of input which does not indicate the result.

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Latest Engineering Methodology Multiple choice Questions and Answers pdf

81.    Error of measuring equipment is
(a)    the closeness with which a measure-ment can be read directly from a measuring instrument.
(b)    a measure of how close the reading is to the true size
(c)    the difference between measured value and actual value
(d)    the smallest change in measureand that can be measured
(e)    the capability to indicate the same reading again and again for a given measureand.

82.    Which of the following is not provided on combination set
(a) centre head  
(b) protractor head
(c) vernier scale
(d) spirit level
(e) squaring head.

83.    Universal surface gauge is used
(a)    for flatness testing
(b)    for layout work and inspection
(c)    for measuring profile of complex sur-face
(d)    for measuring surface roughness
(e)    for measuring concavity of surface.

84.    Accuracy is
(a)     the repeatability of a measuring process
(b)    error of judgement in recording an ob-servation
(c)    the ability of instrument to reproduce same reading under identical situations
(d)    agreement of the result of a measure-ment with the true value of the measured quantity
(e)    the least resolution of an instrument.

85.    Random errors follow the following distribution
(a) claussian 
(b) hyperbolic
(c) parabolic 
(d) t- student
(e) p-distribution.

86.    Which one of the following is the least accurate measuring device
(a)    air gauge
(b)    micrometer screw gauge
(c)    optical projector
(d)    vernier micrometer
(e)    steel scale.

87.    Pick up the wrong statement:
(a)    Accuracy of an instrument is closeness to the true dimension
(b)    Precision represents the degree of repetitiveness.
(c)    Sensitivity refers to minimum change in value that the instrument can reliab¬ly indicate.
(d)    As the sensitivity of an instrument in-crease, its range of measurement also increases.
(e)    If an instrument is not precise it will give different results for same dimen¬sion when measured again and again.

88.    Fiducial indicators contain
(a)    calibrated scale
(b)    a single index mark
(c)    micrometer screw movement
(d)    optical head
(e)    interferometric devices.

89.    A comparator for its working depends on
(a)    accurately calibrated scale
(b)    comparison with standard such as slip gauges
(c)    accurate micrometer gauge
(d)    optical devices
(e)    determining zero error of scale correct-

90.    Precision is
(a)    the repeatability of a measuring process
(b)    agreement of the result of a measure-ment with the true value of the measured quantity
(c)    the ability of a measuring device to detect small differences in a quantity being measured
(d)    the ability of .an instrument to reproduce same reading under identi¬cal conditions
(e)    error of judgment in reading an obser-vation.

91. The thickness of oil film at the surface of slip gauges is of the order of
(a) .005 micron 
(b) .1 micron
(c) 1 micron 
(d) 10 microns
(e) 100 microns.

92.    Pick up the wrong statement. Surface plates are usually made of granite because of following advantages
(a)    because of long period of time for relaxing, it is free from built in residual stresses. There is no corrosion effect also.
(b)    there is less tendency for it to warp
(c)    if a tool or workpiece drops accidently over its surface, residual stresses are not induced
(d)    it simply powders somewhat at the point of impact by falling object
(e)    it enables the phenomenon of wringing flat surfaces over it.

93.    Pick up the wrong statement.
(a)    Error is the disagreement between the result of measurement and actual value.
(b)    Random error are regularly repetitive in nature and result from improper conditions or procedures that are con-sistant in action
(c)    Parasitic error results from incorrect execution of measurement.
(d)    Uncertainty   of measurement  repre-sents the dispersion of the result of measurement defined by the limits of. the error.
(e)    Absolute error is the algebraic dif-ference between the result of measure-ment and the value of comparison.

96.    Which one of the following instruments is the most accurate
(a)    steel scale
(b)    micrometer screw gauge
(c)    vernier caliper
(d)    vernier dial gauge
(e)    optical projector.

98.    In the case of high precision surface plates of diameter upto 200 mm, the working surface should lie between two parallel planes,
whose maximum distance apart is
(a) 0.005 mm    
(b) 0.0005 mm
(c) 0.05 mm     
(d) 0.5 mm
(e) 0.001 mm.

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