A. less than one year
B. 1 to 5 years
C. 5 to 10 years
D. more than 10 years
Related Mcqs:
- 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 - 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 moisture content in a well seasoned timber is_______________?
A. 4% to 6%
B. 10% to 12%
C. 15% to 20%
D. 100% - The practical limit of moisture content achieved in air drying of timber is________________?
A. 5%
B. 15%
C. 25%
D. 35% - The type of joint commonly used at the junction of a principal rafter and tie beam in timber trussess is__________________?
A. mortise and tennon joint
B. oblique mortise and tennon joint
C. butt joint
D. mitred joint - The horizontal timber piece provided at the apex of a roof truss which supports the common rafter is called______________?
A. ridge board
B. hip rafter
C. eaves board
D. valley rafter - Plywood has the advantage of_____________?
A. greater tensile strength in longer direction
B. greater tensile strength in shorter direction
C. same tensile strength in all directions
D. none of the above - A first class brick when immersed in cold water for 24 hours should not absorb water more than______________?
A. 15%
B. 20%
C. 22%
D. 25% - Crushing strength of a first class brick should not be less than_____________?
A. 3.5 N/mm2
B. 7.0 N/mm2
C. 10.5 N/mm2
D. 14.0 N/mm2 - Which of the following sedimentary rocks changes into quartzite by metamorphic action ?
A. sand stone
B. lime stone
C. shale
D. gypsum
