Which of the following represents a metamorphic rock? (1) slate (2) shale (3) quartzite . The correct answer is___________? A. only (3)B. both (1) and (3) C. both (2) and (3) D. all (1), (2) and (3)

In which of the following directions, the strength of timber is maximum ? A. parallel to grains B. 45° to grains C. perpendicular to grains D. same in all directions

The disease of dry rot in timber is caused by_____________? A. lack of ventilation B. alternate wet and dry conditions C. complete submergence in water D. none of the above

The radial splits which are wider on the outside of the log and narrower towards the pith are known as________________? A. heart shakes B. cupshakesC. starshakes D. rindgalls

Which of the following trees yields hard wood ? A. deodar B. chirC. shishum D. e

In which of the following pairs both trees yield soft wood ? A. deodar and shishum B. chir and sal C. sal and teakD. chir and deodar

Sapwood consists of______________? A. innermost annular rings around the pithB. portion of timber between heartwood and cambium layer C. thin layers below the bark D. thin fibre which extends from the pith outwards and holds the annular rings together

Which of the following timbers is suitable for making sports goods ? A. mulberry B. mahogany C. sal D. deodar

Spalling hammer is used for_____________? A. driving wooden headed chiselsB. rough dressing of stones C. carving of stones D. breaking small projection of stones

Crushing strength of a good building stone should be more than____________? A. 50 MPaB. 100 MPa C. 150 MPa D. 200 MPa