Explanation:-

Answer: Option C. -> 2
Non-moving and Moving are two types of cracks in buildings. Non-moving cracks are usually shallow and are the result of shrinkage. Moving crack are wider and are caused due to excessive stress in concrete.

Explanation:-

Answer: Option D. -> Decrease in humidity
Creep is small deformation that formed due to concrete loading which is caused due to increase in temperature and decrease in humidity

Explanation:-

Answer: Option A. -> Low permeability
Less permeability leads to less chance of moisture, chemical absorption which is the factor for corrosion of steel bars.

Explanation:-

Answer: Option B. -> Sulphate
The main reason for cracks in masonry joints is Sulphate content. Cracks appear after 2-3 years of construction.

Explanation:-

Answer: Option D. -> Toothing
Shear cracks appears due to poor bonding between main and cross wall. This can be corrected using toothing.

Explanation:-

Answer: Option B. -> External bonding
The structural concrete slab panels can be repaired by external bonding of steel plates to the soffit by using epoxy adhesives and hollows.

Explanation:-

Answer: Option A. -> Steel reinforcement
The pachometer is used to locate the Steel reinforcement. A wide variety of electronic equipment is presently available in the market in many countries for monitoring and inspection of distress in different types of structures and ultrasonic meters are used to determine the degree of deterioration and distress and / or material imperfections that are relevant to the structural integrity of the structure to be inspected and pachometer is used to locate the steel reinforcements and measures the sizes of the bars embedded in concrete to an accuracy of 3m.

Explanation:-

Answer: Option A. -> Strain gauges
Strain gauges is one of the testing equipments used for inspection. Modern testing equipments which could be of use to the specialized inspection team are listed below:
Rebound hammer compressive strength (Schmidt hammer), ultrasonic pulse velocity detection of cracks, snooper-crawler and adjustable ladders, magnetic decor for measuring thickness of concrete cover and for locating reinforcement bars, mechanical extensometer, transparent templates and microscope for reading of crack widths on the surface of the concrete hydraulic jacks, pressure transducers or load cells for measurement of forces etc, electronic strain gauges for measurement of strain in concrete and steel, vibration measuring equipment, electrical resistance meter(for rust pockets).

Explanation:-

Answer: Option C. -> Major inspection
The inspection more intensive involving examination of structural elements is Major inspection. It even require setting up of special access facilities where required depending upon the importance of the structure. This inspection is generally spaced between 2 and 3 years.

Explanation:-

Answer: Option A. -> Surface cracks
In the form of surface cracks prestressed concrete structures shows visible signs of distress. Spalling of concrete should be special inspection using instruments to users the extent of damage to the structure.