The cracks which extend from bark towards the sap wood in the cross section of a tree, are called
Radial shakes
Star shakes
Heart shakes
Cup shakes
Correct Answer :
B. Star shakes
Related Questions
Which of the following is a mineral?
Basalt
Granite
Quartz
Syenite
Mild steel is used for
Structural works in beams, joints and girders
Small sized water pipes
Columns and struts
None of these
The amount of water used for one kg of distemper is
0.2 liter
0.4 liter
0.6 liter
0.8 liter
Second class bricks
Are of dark brown colour
Produce a metallic sound when struck
Are well burnt
Are under burnt
The wedging is adopted for quarrying costly stratified rock such as
Laterite
Marble
Limestone
All the above
Pick up the correct statement from the following: Method of sawing timber
Tangentially to annual rings, is known as tangential method
In four quarters such that each board cuts annual rings at angles not less than 45°, is known as quarter sawing method
Cut out of quarter logs, parallel to the medullary rays and perpendicular to annual rings, is known as radial sawing
All the above
The base material for distemper, is
Chalk
Lime
Lime putty
Cement wash
The softest rock is
Marble
Diamond
Talc
Quartz
For one cubic metre of brick masonry, number of bricks required, is
400
425
450
500
The operation of removal of impurities or clay adhering to iron ores, is known as
Dressing
Calcination
Roasting
Smelting
For a 50 kg cement bag water required, is
16.5 litres
18.5 litres
20.5 litres
22.5 litres
Most commonly used solvent in oil paints, is
Petroleum
Spirit
Coal tar
Turpentine
Pick up the correct statement from the following:
Quick lime is obtained by burning pure lime stone
Hydraulic lime is obtained by burning lime stone containing clay 5% to 30%
Poor lime is obtained by burning lime stone containing impurities more than 5%
All the above
A badly mixed cement concrete results in
Segregation
Bleeding
Honey combing
None of these
Granite mainly composed of quartz and feldspar particles, is obtained from
Sedimentary rocks
Metamorphic rocks
Igneous rocks
All the above
The colour of statuary marble used for sculptor's work, is
Red
Blue
White
Green
The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:
15, 75, 10
75, 10, 15
10, 15, 75
10, 75, 15
For testing compressive strength of cement, the size of cube used is
50 mm
70.6 mm
100 mm
150 mm
Pick up the correct statement from the following:
Slaked lime contains calcium hydroxide
Quick lime contains calcium oxide
Slaked lime may be obtained from quick lime
All the above
The silica is used for preparing
Silica bricks
Coke oven
Lining for glass furnaces
All of these
Fibre boards can be
Distempered
Painted
Painted and distempered
Used for furniture
Lime concrete is generally used for
Wall foundations
Flooring at ground level
Both (A) and (B)
Neither (A) nor (B)
Pick up the correct statement from the following:
The free quartz suddenly expands at a temperature lower than 600°C
The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO2
The sand stone with silicates resist a fire in a better way
All the above
The fire clay contains pure
Lime
Oxide of iron
Hydrated aluminium silicate
Magnesium
Which of the following ingredients of the brick earth enables the brick to retain its shape?
Alumina
Silica
Iron
Magnesia
Formula for quick lime, is
CaCO3
Ca(OH)2
CO3CO2
None to these
Quartzite, a metamorphic stone is
Hard
Brittle
Crystalline
All the above
For obtaining vinyl chloride acetate, the method used, is
Addition polymerization
Condensation polymerization
Co-polymerization
None of these
The weight of 1 m3 of brick earth, is about
1200 kg
1500 kg
1800 kg
2000 kg
Which of the following timbers is suitable for making sports goods?
Mulberry
Mahogany
Sal
Deodar