A. lack of ventilation
B. alternate wet and dry conditions
C. complete submergence in water
D. none of the above
Related Mcqs:
- 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% - First class timber has an average life of_____________?
A. less than one year
B. 1 to 5 years
C. 5 to 10 years
D. more than 10 years - 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 - The bearing capacity of a water logged soil can be improved by_____________?
A. compacting the soil
B. draining the soil
C. increasing the depth of foundation
D. grouting - Which of the following is a mineral ?
A. basalt
B. granite
C. quartz
D. syenite - The main ingredients of Portland cement are________________?
A. lime and silica
B. lime and alumina
C. silica and alumina
D. lime and iron - Paints with white lead base are suitable for painting of______________________?
A. wood work
B. iron work
C. both wood work and iron work
D. none of the above
