Road Construction Material MCQ – Highway Engineering

Spot test is used to detect

  1. impurity in bitumen
  2. cohesion in bitumen
  3. cracked bitumen
  4. softening point of bitumen
Answer. c

According to IS 73, the minimum penetration of VG 30 grade bitumen tested at 25 degree C is

  1. 80
  2. 60
  3. 45
  4. 35
Answer. c

Softening point of bitumen to be used for road construction at a place where maximum temperature is 40°C should be

  1. greater than 40°C
  2. less than 40°C
  3. equal to 40°C
  4. none of these
Answer. a

Bitumen grade 70/90 indicates

  1. dynamic viscosity
  2. kinematic viscosity
  3. specific gravity
  4. penetration
Answer. d

According to the Indian standard, which of the following Bitumen is suitable for 7-day average maximum air temperature of 46°C?

  1. VG10
  2. VG20
  3. VG30
  4. VG40
Answer. d

Usually, what is the maximum permissible Los Angles abrasion value (%) for dense bituminous macadam?

  1. 45
  2. 25
  3. 35
  4. 55
Answer. c

Which of the following grades of bitumen is the most suitable for a 7 days maximum average air temperature of 15°C?

  1. VG 30
  2. VG 40
  3. VG 10
  4. VG 20
Answer. c

The consistency and flow resistance of bitumen can be determined from which of the following?

  1. Penetration test
  2. Ductility test
  3. Softening point test
  4. Viscosity test
Answer. d

Among the following which one is not a desirable property of the subgrade soil to be used as a highway material?

  1. Stability
  2. Ease of compaction
  3. Good drainage
  4. Bitumen adhesion
Answer. d

According to IS 73, the paving bitumen should be homogeneous and shall not foam when heated to

  1. 160 degree C
  2. 170 degree C
  3. 180 degree C
  4. 200 degree C
  5. 175 degree C
Answer. e

As per IRC, in surface dressing, the quantity of Bitumen used for every 10 m2 of the surface in first coat on WBM road is

  1. 17-19.5 kg
  2. 10 12 kg
  3. 12- 17 kg
  4. 19 -22 kg
Answer. a

In 85/25 grade of Bitumen, the figure of 25 represents

  1. Softening point in °C
  2. Melting point in °C
  3. Flash point in °C
  4. Penetration
Answer. d

Consider the following statements in the context of properties of bitumen.

Statement-1: The softening point of bitumen is the time taken by the balls in the ring-and-ball apparatus to touch the lower plate of the apparatus.
Statement-2: Oxidation leads to softening of the bitumen.

Which of the following is CORRECT?

  1. Statement-1 is TRUE and Statement-2 is FALSE
  2. Both statements are False
  3. Both statements are True
  4. Statement- 1 is FALSE and Statement-2 is TRUE
Answer. b