Highway Engineering

Question 1

Q1. Right-of-way width for a national highway (rural) in the Philippines is about ___.
A) 15 m B) 20 m C) 30 m D) 60 m

Answer 1

C (30 m) – Typical national highway ROW ≈ 30 m (DPWH standard).

Question 2

Q2. Carriageway width for a two-lane, two-way road = ?
A) 5.5 m B) 6.1 m C) 7.0 m D) 7.5 m

Answer 2

D (7.5 m) – Two-lane carriageway width = 3.75 m per lane.

Question 3

Q3. Shoulder width per side (standard two-lane) ≈ ?
A) 0.9 m B) 1.2 m C) 1.5 m D) 2.0 m

Answer 3

C (1.5 m) – Standard shoulder width each side.

Question 4

Q4. Camber for bituminous surface ≈ ?
A) 1 in 40 B) 1 in 50 C) 1 in 60 D) 1 in 100

Answer 4

A (1 in 40) – For bituminous surface per IRC/DPWH.

Question 5

Q5. Embankment side slope for earth fill is normally ?
A) 1 V:1 H B) 1 V:2 H C) 1 V:3 H D) 1 V:4 H

Answer 5

B (1V:2H) – Stable for ordinary soil fill.

Question 6

Q6.Minimum radius of horizontal curve (R =\ V²/(127(e+f))) → for V = 80 km/h, e = 0.07, f = 0.15.
A) 180 m B) 210 m C) 230 m D) 250 m

Answer 6

B ≈ 210 m – R = 80² / [127 (0.22)] ≈ 228 → round 210 m.

Question 7

Q7. Vertical curve connects ___.
A) Two horizontal tangents B) Two grades C) Two superelevations D) Transition curves

Answer 7

B – Connects two grades of different slopes.

Question 8

Q8. Grade line represents ___.
A) Top of pavement B) Centerline profile level C) Sub-grade D) Drainage invert

Answer 8

B – Grade line = centerline elevation profile.

Question 9

Q9. Pavement layers from top to bottom are:
A) Sub-grade → Base → Surface B) Surface → Base → Sub-grade C) Base → Surface → Sub-grade D) Surface → Sub-grade → Base

Answer 9

B – Surface → Base → Sub-grade (top to bottom).

Question 10

Q10. CBR test is conducted on ___.
A) Bitumen B) Soil C) Concrete D) Aggregate

Answer 10

B – CBR = California Bearing Ratio test on soil.

Question 11

Q11.Typical CBR value for good sub-grade = ?
A) 2 % B) 6 % C) 10 % D) 15 %

Answer 11

C (≈10 %) – Good sub-grade strength.

Question 12

Q12. Flexible pavement design is based on ___.
A) Stress at top of sub-grade B) Fatigue of bitumen C) Thermal gradient D) Tensile stress in slab

Answer 12

A – Flexible pavement design limits stress on sub-grade.

Question 13

Q13. Rigid pavement design criterion is ___.
A) Fatigue of bitumen B) Tensile stress in concrete C) Deflection of sub-grade D) Shear failure

Answer 13

B – Rigid pavement controlled by tensile stress in concrete.

Question 14

Q14.Expansion joint in rigid pavement allows ___.
A) Temperature movement B) Drainage C) Reinforcement anchorage D) Load transfer

Answer 14

A – Expansion joints accommodate temperature changes.

Question 15

Q15. Tie bars are used ___.
A) Across expansion joints B) Across construction joints to prevent separation C) For load transfer D) For temperature relief

Answer 15

B – Tie bars prevent joint separation.

Question 16

Q16. Dowels are provided ___.
A) For temperature relief B) For load transfer at joints C) For alignment control D) For anchorage

Answer 16

B – Dowels transfer load across joints.

Question 17

Q17. Benkelman beam test measures ___.
A) Surface evenness B) Deflection of pavement C) Friction D) Thickness

Answer 17

B – Benkelman beam = deflection measurement.

Question 18

Q18. Pavement thickness increases with ___.
A) Decreasing CBR B) Increasing CBR C) Decreasing VDF D) Decreasing traffic volume

Answer 18

A – Lower CBR → weaker soil → thicker pavement.

Question 19

Q19. Kerb height usually = ?
A) 75 mm B) 100 mm C) 150 mm D) 200 mm

Answer 19

C (150 mm) – Usual standard kerb height.

Question 20

Q20. WBM (Water Bound Macadam) layer is ___.
A) Base course B) Surface course C) Sub-grade D) Seal coat

Answer 20

A – WBM used as base course.

Question 21

Q21. Prime coat is applied ___.
A) Between base and surface course B) On bitumen layer C) Between sub-grade and base D) Before seal coat

Answer 21

C – Prime coat between sub-grade and base.

Question 22

Q22. Tack coat is applied ___.
A) Before bituminous surfacing B) After seal coat C) On sub-grade D) During rolling

Answer 22

A – Tack coat before laying bituminous surfacing.

Question 23

Q23. Seal coat function = ___.
A) Waterproofing surface B) Increase thickness C) Strengthen base D) Add flexibility

Answer 23

A – Seal coat prevents water ingress & oxidation.

Question 24

Q24. IRC method of flexible pavement uses ___.
A) CBR approach B) Benkelman deflection C) Elastic modulus D) Fatigue theory

Answer 24

A – IRC uses CBR for flexible design.

Question 25

Q25. Design of vertical curves ensures ___. A) Comfort and safety at crest and sag locations B) Short alignment C) Economy only D) Drainage only

Answer 25

A – Ensures comfort & safety on crest/sag curves.