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    AE May 2013 98 Civ B7

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    tirocki
    This document contains information for a 3 hour highway engineering examination, including 7 multi-part questions worth a total of 100 marks. It provides instructions for the exam, noting it is open book and calculators are permitted. The questions cover topics like storage capacity calculations, asphalt mix design, concrete pavement design, vertical curve design, soil compaction testing, and jointed concrete pavement thickness design.

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    © All Rights Reserved
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    AE May 2013 98 Civ B7

    Uploaded by

    tirocki
    11 views8 pages
    This document contains information for a 3 hour highway engineering examination, including 7 multi-part questions worth a total of 100 marks. It provides instructions for the exam, noting it is open book and calculators are permitted. The questions cover topics like storage capacity calculations, asphalt mix design, concrete pavement design, vertical curve design, soil compaction testing, and jointed concrete pavement thickness design.

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    canada professional engineering technical exam mentioned year and mentioned exam questions

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    AE-May-2013-98-Civ-B7

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    This document contains information for a 3 hour highway engineering examination, including 7 multi-part questions worth a total of 100 marks. It provides instructions for the exam, noting it is open book and calculators are permitted. The questions cover topics like storage capacity calculations, asphalt mix design, concrete pavement design, vertical curve design, soil compaction testing, and jointed concrete pavement thickness design.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    11 views8 pages

    AE May 2013 98 Civ B7

    Uploaded by

    tirocki
    This document contains information for a 3 hour highway engineering examination, including 7 multi-part questions worth a total of 100 marks. It provides instructions for the exam, noting it is open book and calculators are permitted. The questions cover topics like storage capacity calculations, asphalt mix design, concrete pavement design, vertical curve design, soil compaction testing, and jointed concrete pavement thickness design.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 8

    National Examinations - May 2013

    98-Civ-B7 Highway Engineering

    3 Hour Duration

    NOTES

    I. If doubt exists as to the interpretation of any question, the candidate is urged to submit with the
    answer paper a clear statement of any assumptions made.

    2. Any data, not given but required, can be assumed.

    3. This is an "OPEN BOOK" examination. Any non-communicating calculator is permitted.

    4. A total of five solutions is required. Only the first five as they appear in your answer book will
    be marked.

    5. All questions are of equal value.

    Page 1 of7
    [- - - -
    -------------------------- ----

    98-Civ-B7 May 2013 Highway Engineering Page 2 of7

    I. (a) Calculate the storage capacity of a rectangular pond given the following:

    Bottom elevation 100.000 m with cross sectional dimensions 100 m x 50 m


    Top elevation 120.000 m with cross sectional dimensions 200 m x 100 rn
    Straight sloping sides.
    What are the cross-sectional dimensions at elevations 105.000, 110.000. and 115.ODD?
    Use this cross-sectional data to calculate the storage capacity.

    (b) The cross-sectional areas along a proposed embankment as obtained with a planimeter
    are as follows:

    Station End area


    (m2)
    50+000 640
    51+000 1500
    52+000 800

    Calculate the total volume offill in cubic metres between stations 50+000 and
    52+000using
    (i the average end area method and
    (ii) the prismoidal formula.
    (Note: The distance between each station is 1000 m.)

    2. A compacted asphalt mixture has bulk specific gravity of 2.329.


    Specific gravity of asphalt = 1.017
    Binder = 6% by weight of total mix
    Aggregate effective specific gravity = 2.730
    Aggregate bulk specific gravity = 2.715
    Calculate
    (a) Percentage of binder by weight of aggregate
    (b) maximum specific gravity of the mix
    (c) Percent voids in mineral aggregate
    (d) Percent voids filled with asphalt
    (e) Percentage of absorbed binder
    98-Civ-D7 May 2013 Highway Engineering Page 3 of7

    3. With respect to concrete pavements:


    (a) Why is air-entrained concrete used?
    (b) What is the modulus of subgrade reaction?
    (c) What are transverse contraction joints? What is their purpose?
    (d) What are transverse construction joints? What is their purpose?
    (e) What are transverse expansion joints? What is their purpose?
    (1) What are longitudinal joints? What is their purpose?
    (g) Explain pumping of joints.
    (h) Why is curing of concrete necessary?
    (i) What are the various methods of curing of concrete pavements?
    U) Define fineness modulus of fine aggregate ..

    4(a) From comfort consideration, what is the minimum length of a parabolic sag vertical
    curve connecting a -4% and +3% grades? Running speed of vehicle = 80 kmIh
    Permissible centripetal acceleration = 0.3 mJs2

    4 (b) CDR Test results:

    Stress (MPa) Penetration (mm)

    50*0.0069 0.05*25.4

    75*0.0069 0.075*25.4

    125*0.0069 0.1*25.4

    400* 0.0069 0.2*25.4

    700*0.0069 0.3*25.4

    860*0.0069 0.4*25.4

    890"'0.0069 0.5*25.4

    (i) Plot stress-penetration curve using the data from the above table
    (ii) Correct for concave upward shape. Redefme the origin.
    (iii) Using the corrected curve, what is the stress corresponding to corrected 0.1 *25.4
    mm penetration? .
    (iv) If the standard stress causing 0.1 *25.4 mm penetration is 1000*0.0069 MPa,
    calculate the CBR value of the sample.
    98-Civ-B7 May 2013 Highway Engineering Page 4 of7

    5. Proctor Compaction Test

    (a) The following information is from a compaction test performed in the laboratory by the
    Standard Proctor compaction procedure. Show all the calculations and draw the moisture-
    density curve and determine the optimum moisture content and maximum density for this
    soil.

    (b) Assuming that the above soil has a specific gravity of2.80, make the necessary
    calculations and draw "the zero air voids curve" on the same moisture-density curve
    drawn above.

    Mass of mould = 2,450 g

    Trial # Mass of compacted soil + Moisture content (%)


    mould (g)

    1 4,150 10.0

    2 4,210 11.0

    3 4,320 12.0

    4 4,420 13.0

    5 4,410 14.0

    6 4,360 15.0

    6. Vertical curve
    (a) A plus 4% grade intersects a minus 3% grade at station 15 + 00 rn (distance between
    stations is 100 m) at an elevation of 400.00 m. Given that 1000 m length of vertical
    curve connects the two grades, determine the station and elevation of PVC and PVT.
    (b) Calculate the elevations at 100 m intervals
    (c) What is the available stopping sight distance on the curve?
    (d) Locate the station and elevation of zero grade on the curve,
    (e) What is the rate of change of grade?
    98-Civ-B7 May 2013 Higbwa Engine-ering

    7. Design the thickness ofajointed concrete pavement with untied asphalt shoulders,
    given the following:
    Four lane divided rural highway
    Design life = 2 years
    First year traffic estimated = 150,000 ESAL
    Expected traffic growth = 4%
    Design reliability = 95%
    Overall standard deviation = 0.4
    Initial serviceability index = 4.5
    Terminal serviceability index = 2.5
    Subbase is granular material
    Compressive strength of concrete = 35 MPa
    Modulus of rupture = 4.0 MPa
    Modulus of sub grade reaction = 1.0 MPa
    Drainage is fair (moisture levels approaching saturation 10% of the time)
    ______ ~9~8~-C~iv_-B~7
    __ ~M~ay2013 Highway Engineering Page 6 of7-
    98-Civ-B7 May 2013 Page 70f7
    --- -------------------------------------------------------------------

    National Examinations - May 2013

    98-Civ-B7 Highway Engineering

    Grading Scheme

    1 (a) 10 marks
    (b) 10 marks

    2 (a) through (e) - 4 marks each

    3 (a) to G) - 2 marks each

    4 (a) 10 marks
    (b) 10 marks

    5 (a) 10 marks
    (b) 10 marks

    6 (a) through (e) - 4 marks each

    7.20 marks

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