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Past Questions — 2026
The extra width provided for Single lane pavement for curve radius between 61 to 100m is:
A)
Nil
B)
0.6m
C)
0.9m
D)
1.2m
In highway engineering, extra widening on curves for a single-lane pavement depends on the curve radius. For a radius of 61 to 100 m, the standard extra width provided is 0.6 m. Hence, option (b) is correct. The other options do not match the standard widening table used for single-lane roads.
The rolling speed for rolling Bituminous concrete is:
A)
Not more than 10km/hr
B)
Between 5 – 10 km/hr
C)
Not more than 5km/hr
D)
Not more than 7km/hr
For laying and compacting bituminous concrete, rolling is done at a slow speed to avoid displacement of the mix and to achieve proper compaction. Standard highway engineering practice specifies that the rolling speed should not exceed 5 km/hr. Hence, option (c) is correct. The other options are either too high or give a range that is not the usual specification for bituminous concrete rolling.
Based on structural behavior, pavements are generally classified into two categories, namely:
A)
Bituminous & Concrete
B)
Flexible and rigid
C)
WBM & WMM
D)
All weather and fair weather
Pavements are classified based on structural behavior into two main types: flexible pavements and rigid pavements. Flexible pavements distribute wheel loads through layer interlocking and grain-to-grain contact, while rigid pavements distribute loads over a wider area due to their slab action. Bituminous and concrete are materials used in pavement construction, not the behavioral classification. WBM and WMM are types of base courses, and all-weather/fair-weather refers to road usability, not structural behavior.
Causeway is one type of:
A)
Pavement
B)
Subsurface drainage
C)
Cross drainage
D)
Temporary crossing on river
A causeway is a raised roadway or passage across low-lying land or a shallow watercourse, often used as a temporary or low-cost crossing over a river or stream. In highway engineering, it is commonly treated as a type of temporary crossing. Pavement is the road surface, subsurface drainage deals with removing water from below the road, and cross drainage refers to structures like culverts and bridges that allow water to pass across a road alignment.
What is the number of bricks taken in analysis of cost for 1sqm half brick wall?
A)
49.5 nos
B)
52 nos
C)
52.5 nos
D)
56.5nos
For a half-brick wall, the nominal thickness is about 100 mm. For 1 sqm area, the volume of brickwork is 1 × 0.10 × 1 = 0.10 m³. Since 1 m³ of brickwork generally requires about 500 bricks, 0.10 m³ requires about 50 bricks; in standard estimation analysis, with mortar joints included, the adopted figure is about 52.5 bricks per 1 sqm of half-brick wall. Hence option (c) is correct. The other values are not the standard analysis figure used in estimation and costing.
Finer the cement, the need for water for hydration and workability:
A)
Reduces
B)
Same for all size of cement
C)
Reduces to great extent
D)
Increase
Finer cement has a larger surface area per unit mass. As a result, it requires more water for complete hydration and also more water to maintain workability. Hence, with increase in fineness, the need for water increases. Options (a), (b), and (c) are incorrect because fineness does not reduce the water requirement.
What is the unit weight of Bituminous pavement layer in kN/cum?
A)
24
B)
25
C)
22
D)
20
The unit weight of a bituminous pavement layer is commonly taken as about 20 kN/m³ (kN/cum) in highway engineering design and estimation. This is a standard approximate value used for flexible pavement calculations. The other options, 22, 24, and 25 kN/m³, are higher than the usual adopted value for bituminous layers.
Curing is of particular importance in situation where:
A)
The water-Cement ratio is high
B)
The water-Cement ratio is low
C)
Temperature of surrounding environment is low
D)
There is high humidity
Curing is especially important when the water-cement ratio is low because there is less free water available for complete hydration of cement. In such concrete, moisture can be lost quickly, so proper curing is needed to maintain hydration, strength gain, and durability.
Why the others are incorrect:
- (a) High water-cement ratio already has excess water, so curing is less critical than in low w/c mixes.
- (c) Low surrounding temperature affects setting and hardening, but the specific situation where curing becomes particularly important is low water-cement ratio.
- (d) High humidity reduces moisture loss, so curing demand is not as severe as in dry conditions.
The recommended values of camber for cement concrete and high type bituminous surface in heavy rainfall area is
A)
2.5%
B)
3.0%
C)
2.0%
D)
4.0%
For cement concrete and high-type bituminous surfaces, the recommended camber in heavy rainfall areas is 2.0%. Such impervious surfaces need comparatively less camber than earth or gravel roads, but in heavy rainfall a slightly steeper camber is preferred to ensure quick drainage. Hence, 2.0% is the correct standard value among the given options. The other options are either too steep for these surfaces or not the recommended value.
Proper grading of aggregates in concrete improves:
A)
Workability
B)
Slump
C)
Density
D)
Setting time of concrete
Proper grading of aggregates means having a suitable distribution of particle sizes. This reduces voids, improves packing, and makes the concrete mix easier to place and compact, thereby increasing workability. Slump may change as an indicator of workability, but it is not the direct property improved. Density may also improve slightly due to better packing, but the standard expected answer is workability. Setting time is controlled mainly by cement and admixtures, not aggregate grading.
The Flexible pavement consist the following components:
A)
Subgrade, GSB, BM & surface course
B)
Subgrade, Sub-base, Base & Surface course
C)
Subgrade, Dry Lean concrete, WBM, Wearing course
D)
Subgrade, WBM, WMM & Concrete
A flexible pavement is generally constructed in layers starting from the natural soil support and moving upward: subgrade, sub-base, base, and surface course. This is the standard component sequence in highway engineering. Option (a) is incomplete/mixed terminology, while (c) and (d) include rigid pavement or non-standard layer combinations.
The length of Cross drainage structure considered as culvert is:
A)
Upto 6m
B)
1.2m to 5m
C)
Upto 5m
D)
1m to 1.5m
In highway engineering, a cross-drainage structure is classified as a culvert when its span/length is up to 6 m. Structures with larger spans are generally treated as small bridges or bridges, depending on the standard followed. Hence, option (a) is correct. The other options give incorrect span ranges that do not match the standard culvert classification.
Rolling of Bituminous layer is done:
A)
From centre to edge
B)
From edge to centre
C)
In anyway the operator like but at required speed
D)
Start on the two edges and then to centre
In bituminous road construction, rolling is generally started from the centre of the pavement and progressed towards the edges. This helps in pushing the material outward, maintaining proper cross-fall and avoiding accumulation of material at the centre. Rolling from edge to centre is avoided because it can cause shoving and irregular surface formation. Hence, the correct answer is (a) From centre to edge.
What is the function of Catch water drain?
A)
To drain water from pavement surface
B)
It is another form of subsurface drainage
C)
To prevent water from hillside falling to road pavement
D)
To drain water coming from weep hole.
A catch water drain is provided on hill roads above the road formation to intercept and divert storm water flowing down the hillside before it reaches the road. Its purpose is to protect the pavement and side slopes from erosion and damage. Option (a) refers to surface drainage on the pavement, (b) refers to subsurface drainage, and (d) refers to drainage from weep holes in retaining structures.
The desired temperature range of Bitumen when mixing is:
A)
120 degree centigrade – 130 degree centigrade
B)
110 degree centigrade – 140 degree centigrade
C)
150 degree centigrade – 177 degree centigrade
D)
160 degree centigrade – 187 degree centigrade
In bituminous paving work, bitumen is generally heated to the mixing range of about 150°C to 177°C so that it attains proper fluidity and coats the aggregates uniformly. Lower ranges such as 110°C–140°C or 120°C–130°C are usually insufficient for proper mixing, while 160°C–187°C is too high and may cause excessive ageing of bitumen.
Codes specifies lower bond resistance for the top reinforcement in beam because.
A)
Top reinforcement in a beam is more important and hence lower bond resistance is given for having longer development length.
B)
There is a possibility of air trapped beneath the upper reinforcement and thereby weakening the bond.
C)
The higher part of concrete in a beam have lower strength.
D)
The top part is exposed to air after casting so the concrete on the upper part is weaker.
In RCC beams, the top bars are said to have lower bond resistance because of the 'top bar effect'. During casting, bleed water and settlement cause a weak laitance layer and slightly poorer compaction near the top surface of concrete. As a result, the concrete around top reinforcement is not as strong in bond as that around bottom bars, so codes provide lower bond stress for top reinforcement. Option (a) is wrong because the reason is not that top reinforcement is more important; (b) is not the standard code reason; and (c) is too vague and not the accepted explanation.
The desired temperature range of Bitumen when spreading at the location of laying is:
A)
121 degree centigrade – 163 degree centigrade
B)
110 degree centigrade – 140 degree centigrade
C)
150 degree centigrade – 177 degree centigrade
D)
160 degree centigrade – 187 degree centigrade
For bituminous work, the temperature at the site of laying/spreading is generally kept around 110°C to 140°C so that the binder remains workable and provides proper coating and compaction. Temperatures much lower than this make the bitumen too stiff, while much higher temperatures may lead to excessive aging and loss of desirable properties. Hence, option (b) is correct.
What length of bridge is considered a minor bridge?
A)
Above 5 m to 25m
B)
Above 6m to 60m
C)
7m to 80m
D)
10m to 60m
In highway engineering, a bridge with a length more than 5 m but not exceeding 25 m is classified as a minor bridge. Bridges up to 5 m are usually culverts, while longer bridges are classified as major bridges. Therefore, option (a) is correct.
Joints in cement Concrete Pavement are provided:
A)
To give aesthetic look of the pavement.
B)
To reduce temperature stresses
C)
To allow drainage
D)
For ease of construction
Joints in cement concrete pavements are mainly provided to control cracking caused by temperature changes and shrinkage. Concrete expands and contracts with temperature variation, and joints relieve the resulting stresses. Hence, the correct answer is (b). Options (a) and (c) are unrelated, and (d) is not the primary purpose of pavement joints.
For complete hydration of cement the water cement ratio required is about:
A)
0.25
B)
0.35
C)
0.15
D)
0.40
Option D is correct: 0.40.
The standard weight of 1m length 12mm dia reinforcing bar is:
A)
1. 59 kg
B)
1.58kg
C)
0.89 kgs
D)
0.62 kgs
Option B is correct: 1.58kg.
Water absorbtion for 1st class bricks used should not be more than
A)
12%
B)
15%
C)
20%
D)
25%
According to the Indian Standard (IS) specifications for bricks, bricks are classified based on their quality, strength, and water absorption properties. For a First Class Brick, the standard requirement is that it should not absorb more than 20% of its own dry weight when immersed in water for 24 hours.
Breakdown of classes:
1. First Class Bricks: Water absorption should not exceed 20% of dry weight. They are thoroughly burnt, have a ringing sound, and sharp edges.
2. Second Class Bricks: Water absorption should not exceed 22% of dry weight.
3. Third Class Bricks: Water absorption is generally higher and they are used for temporary structures or non-load bearing walls.
Therefore, option (c) 20% is the correct technical specification for first-class bricks.
The strirrups most commonly used in building in Mizoram is:
A)
3 legged
B)
2 legged
C)
4 legged
D)
1 legged
In reinforced concrete construction, stirrups are used to resist shear forces and hold the longitudinal reinforcement in place. A '2-legged stirrup' is the most standard and common configuration used in residential and commercial building beams and columns. It consists of a single loop of steel that wraps around the longitudinal bars, creating two vertical 'legs' that intersect the shear plane. While 4-legged or multi-legged stirrups are used in heavy-duty industrial structures or areas with extremely high shear stress, the vast majority of standard building construction in Mizoram (and generally across India following IS 456 standards) utilizes 2-legged stirrups for typical structural members. A 1-legged stirrup is not a standard structural configuration for shear reinforcement.
For construction lime is also used and it is suitable for:
A)
Ordinary construction works
B)
All construction works
C)
Only Masonry works
D)
Recommended for RCC works
Option A is correct: Ordinary construction works.
What is the unit weight of steel in kg/cum?
A)
7400
B)
6500
C)
7850
D)
7500
In material science and civil engineering, the unit weight (or density) of mild steel is a standard constant used for structural calculations. The density of steel is approximately 7850 kg/m³ (kilograms per cubic meter).
Step-by-step verification:
1. The density of iron is roughly 7874 kg/m³.
2. Steel is an alloy of iron and carbon; for most engineering purposes, the standard value adopted for the unit weight of steel is 7850 kg/m³.
3. Comparing this to the options:
- Option (a) 7400: Incorrect, too low.
- Option (b) 6500: Incorrect, too low.
- Option (c) 7850: Correct, matches the standard engineering constant.
- Option (d) 7500: Incorrect, too low.