This set of Pavement Design Multiple Choice Questions & Answers (MCQs) focuses on “Highway Maintenance – Quality Control – 1”.
1. What are the key components of quality control?
a) Target and strategy
b) Target and variability
c) Strategy and result
d) Result and variability
Explanation: There are two key components of quality control. They are target and variability. These two components ensure the quality control of the processes – construction, maintenance and rehabilitation of highways.
2. Which code is referred to for the guidelines regarding quality control?
Explanation: IRC:SP:11-1984 is the code used to refer to while performing quality checks on the pavements. It is a handbook of quality control for the construction of roads and runways. IRC:SP:12-2015 gives the guidelines on parking.
3. What are the different types of quality control?
a) Process control and target control
b) Operation control and target control
c) Process control and end result control
d) Operation control and end result control
Explanation: There are two different types of quality control methods being used over the years. They are process control and end result control. They have been outlined in detail in the IRC code.
4. ______ is an example of the end result method of quality control.
c) Soil compaction
Explanation: The end result method uses both field and lab tests to ensure the quality of the work. The check for unevenness of the completed pavement is one such test. Slump, soil compaction and concreting are all examples of the process control method.
5. Who is responsible for the decision to be taken on the end result method of quality control?
c) Chief engineer
d) Construction agency
Explanation: In the method of end result quality control, the decisions are taken by the construction agency. The agency is responsible for making decisions regarding the selection of the construction method and the equipment for the same.
6. What are the main parameters to be tested for ensuring quality in the earthwork?
a) Borrow materials and compaction
b) Moisture content and compaction
c) Material properties and depth of earthwork
d) Density and deleterious materials
Explanation: The earthwork is the first step in the road construction process and its quality is of utmost importance. The tests on the properties of the borrow materials and the compaction are the main parameters to be checked.
7. The quality control test for the rate of spread of binder is done based on IS 2386-1963.
Explanation: The quality control test for the rate of the binder is to be carried out according to Appendix 4 IRC:SP:11-1984 using the tray test vide. The frequency of the test is different for every type of material being used in pavement construction.
8. Which of the below is not a type of test performed on coarse aggregates in the rigid pavement for quality control?
a) Alkali-aggregate reaction
b) Los Angeles abrasion
c) Chemical test
Explanation: The various tests to be performed on each material used in the rigid pavement are mentioned in Table 6.1 of IRC:SP:11-1984. In the table, for coarse aggregates, alkali-aggregate reaction, Los Angeles abrasion, impact and soundness tests are specific to it. The chemical test is done for ensuring water quality.
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