WorksheetsINTERVIEW LAB HIGHWAY & TRAFFIC
Total questions: 25
Worksheet time: 25mins
PENETRATION TEST : Penetration test on bitumen is used for determining its ______.
Grade
Viscosity
Ductility
Temperature susceptibility
PENETRATION TEST : Higher values of penetration indicate the softer consistency.
True
False
PENETRATION TEST : The following apparatus used in the penetration test EXCEPT
Needle
Water Bath
Tamping rod
Penetration test apparatus
PENETRATION TEST : Find the value of TA’ if the subgrade CBR is 10%
10
20
34
25
PENETRATION TEST : The consistency of bitumen related with the _______changes.
Viscosity
Temperature
Stiffness
Penetration
SOFTENING POINT TEST: Softening point of bitumen is used for determining it’s ______ at which the material attains a certain degree of softness under specified conditions of test.
Temperature
Viscosity
Ductility
Grade
SOFTENING POINT TEST: The following apparatus used in ball and ring test EXCEPT
Ring
Ball
Holder
Penetrometer
SOFTENING POINT TEST: The rate of rise temperature shall be uniform and not be averaged over the period of the test. The maximum permissible variation shall be at ______________per minute.
3 ± 0.5 °C
2 ± 0.5 °C
5 ± 0.5 °C
4 ± 0.5 °C
SOFTENING POINT TEST: Before apply the heat, the specimen starting temperature should be start at _______.
2 °C
3 °C
4 °C
5 °C
SOFTENING POINT TEST: The different temperature for first and second ball touches the bottom plates should be below than ______________.
1 °C
2 °C
3 °C
4 °C
SPOT SPEED STUDY: Which from the following are among the objectives of the spot speed study?
i. To determine the mean speed of traffic
ii. To determine the median speed of traffic
iii. To determine the 85th percentile speed of traffic
iv. To determine the red-light running speed of traffic
v. To justify the speeding issue at the location of study
i & ii
i, ii, iii & v
i, ii, iii & iv
All of the above
SPOT SPEED STUDY: What is the precaution that has been mentioned in the procedure of spot speed for the operator of the laser gun?
Make sure that the operator wears appropriate outfit
Make sure that the operator is not seen by the motorists
Make sure that the operator faces the back of moving vehicles
Make sure the operator is at a minimum angle from the roadside
SPOT SPEED STUDY: What is the different in term of data to be recorded in Form SS1 and SS2?
Form SS1 is for measurement data while Form SS2 is for similar data which categorise in respective speed classes
Form SS1 is for first operator while Form SS2 is for second operator
Form SS1 is for empirical data while Form SS2 is for theoretical data
No different at all
SPOT SPEED STUDY: Which diagrams need to be plotted to analyse spot speed data?
i.Frequency Histogram
ii. Frequency Distribution Curve
iii.Cumulative Frequency Distribution Curve
iv. Cumulative Frequency Distribution Histogram
i & ii
i & iv
i, ii & iii
All of the above
SPOT SPEED STUDY: Which speed characteristic can be determined using both from graph and formula?
Mean speed
Mode speed
Median speed
85th percentile speed
AGGREGATE SHAPE TEST: Which statements of the Flakiness and Elongation Index test are correct?
i. Flakiness index takes into account the slot-passing aggregates
ii. Rounded aggregates improve workability of concrete pavement
iii. Elongation index takes into account the slot-retained aggregates
iv. Flaky and elongation aggregates cause weakness to the pavement
v. Regular shapes particles increase stability in interlocking for granular base course
i & ii
i, ii, iii & v
i, ii, iii & iv
All of the above
AGGREGATE SHAPE TEST: What is the aim of distributing suitable aggregates grain size?
To obtain minimum voids in the dry mix on the maximum density
To obtain minimum cost in the dry mix
To obtain optimum binder content
To avoid using more binder
AGGREGATE SHAPE TEST: Aggregate is considered as flaky if _____________.
passing 6.30 mm or retained on 50 mm sieves
passingn6.30 mm and retained as 63.0 mm sieves
has a length of more than 1.8 of their mean sieve size
has a thickness of less than 0.6 of their mean sieve size
AGGREGATE SHAPE TEST: How elongation index is calculated?
Percentage of total weight on aggregate in each fraction passing thickness gauge divide the total weight of the individual size fraction
Percentage of total weight on aggregate in each fraction retained on length gauge divide the total weight of the individual size fraction
Percentage of total weight of the individual size fraction divide the total weight on aggregate in each fraction passing thickness gauge
Percentage of total weight of the individual size fraction divide the total weight on aggregate in each fraction retained on length gauge
AGGREGATE SHAPE TEST: Which guideline is correct?
i. For flakiness index, aggregate size fraction passing at 28mm and retained at 20mm sieves, the minimum mass for subdivision shall be 35 kg.
ii. For flakiness index, aggregate size fraction passing at 14mm and retained at 10mm sieves, the minimum mass for subdivision shall be 1000 g.
iii. For elongation index, aggregate size fraction passing at 37.5mm and retained at 28mm sieves, the minimum mass
iv. For elongation index, aggregate size fraction passing at 20mm and retained at 14mm sieves, the minimum mass for subdivision shall be 2000 g.
i & ii
i, ii & iii
ii, iii & iv
All of the above
AIV TEST: Below are the procedures of conducting the Aggregate Impact Value (AIV) test EXCEPT:
Sieve the material through 12.5 mm and 10.0mm IS sieves. The aggregates passing through 12.5mm sieve and retained on 10.0mm sieve comprises the test material.
Pour the aggregates to fill about just 1/3 rd depth of measuring cylinder.
Compact the material by giving 15 gentle blows with the rounded end of the tamping rod.
Add two more layers in similar manner, so that cylinder is full.
AIV TEST: Aggregate impact value is used to classify the stones in respect of their toughness property. If the AIV obtain is more than 35 %, what that mean?
Exceptionally strong
Satisfactory for road surfacing
Strong
Weak for road surfacing
AIV TEST: The uses of the AIV test are EXCEPT:
To determine the impact value of the aggregates used in pavement construction(Road)
To assess their suitability in road layers (base course, surface course) construction on the basis of impact value.
To determine the flakiness index of the aggregates used in pavement construction.
To check the classification of the aggregate and with respect to their toughness property
AIV TEST: Below are the theory of the Aggregate Impact Value test EXCEPT:
The aggregates should therefore have sufficient toughness to resist their disintegration due to impact. This characteristic is measured by impact value test.
The aggregate impact value is a measure of resistance to sudden impact or shock, which may same from its resistance to gradually applied compressive load.
The property of a material to resist impact is known as toughness. Due to movement of vehicles on the road the aggregates are subjected to impact resulting in their breaking down into smaller pieces.
Their suitability in road construction will be assess based on the basis of impact value.
AIV TEST: After completing blows by releasing the hammer on the aggregate, the crushed aggregate was removed from the cup and sieve it through ____________ IS sieves until no further significant amount passes in one minute. Weigh the fraction passing the sieve to an accuracy of 1 gm. Also, weigh the fraction retained in the sieve.
12.5 mm
6.3 mm
10.0 mm
2.36 mm
