61. The preventive ASCU treatment for timber is given against
- Dampness
- Fire attack
- Chemical attack
- Termite attack
62. The minimum number of plies in plywood is
- 6
- 5
- 3
- 2
63. Thin sheet of superior quality wood of 0.4 to 6 mm thickness is called as
- Particle board
- Veneers
- Fiber wood
- Plywood
64. Tensile strength of wood is
- maximum in the direction parallel to grains
- minimum in the direction parallel to grains
- maximum in the direction across the grains
- the same in all the directions
65. The drawback of electric seasoning of timber is
- Checks
- Splitting
- Cracks
- Reduced strength
66. An assembled product made up of veneers and adhesives are called
- Plank
- Board
- Batten
- Plywood
67. The central part of a tree is called
- Heart wood
- Cambium
- Pith
- Sap wood
68. Between teak and shisham,
- teak is more resistant to white ants than shisham
- shisham is more resistant to white ants than teak
- the resistance to white ants is the same
- none of the above
69. Which of the following trees yield soft wood?
- Shisham
- Sal
- Teak
- Chir
70. The timber whose moisture content has been reduced to the specified minimum under more or less controlled processes of drying is called
- Sleeper
- Shook
- Shingle
- Seasoned timber