top 8 construction

A solar cooker contains a box made of insulating material, with its inner surfaces blackened. The top is closed by a glass sheet. The box is closed such that the inner part does not come in contact with the outside air, there by reducing heat loss due to convection currents. The glass ..

The biogas plant is a brick and cement structure having the following five sections: Mixing tank present above the ground level. Inlet chamber: The mixing tank opens underground into a sloping inlet chamber. Digester: The inlet chamber opens from below into the digester which is a huge tan..

To construct a perpendicular to a line at a point on i..

To construct a perpendicular to a line at a point on it A line AB and a point O on it. A perpendicular to AB at O. (i) With O as centre and any suitable radius, draw arcs to cut AB at points S and T. (ii) Take radius equal to more than half the length of ST. (iii) With this radius, taking..

To construct a triangle when the sum of two sides, the remaining side and the angle between them are given (We assume that the given angle can be constructed with ruler and compass alone) In BC = 3.8 cm, and AB + AC = 6.5 cm (1) Draw BC = 3.8 cm and at B make..

To construct when , AC = 4 cm, BC = 4.8 cm, two sides and the angle opposite to one of them are given. (1) Draw a straight line AX (2) At A, Construct (3) From A, cut off AC = 4 cm. (4) From C, cut off CB = 4.8 cm, B lying on AX. (5) Then D ABC is the require..

>(iii) With S as centre and radius equal to DE draw an arc to cut this arc at T. (iv) Join QT and produce it to ..

The floating gas holder type of biogas plant has the following chambers/ sections: Mixing Tank - present above the ground level. Digester tank - Deep underground well-like structure. It is divided into two chambers by a partition wall in between. It has two long cement pipes: i) Inlet pipe o..

Two towers are constructed on a plot of land. The angle of depression of the top of the second tower when seen from the top of the first tower is 40°. If the height of the first tower is 135 ft and the height of the second tower is 78 ft, then find the horizontal d..

A bird is sitting on the top of a fence 8 ft above the ground. It flies to the top of a tree branch 12 ft above the ground. Find the change in elevation from the first point to the next. => - 4 ft or 3 ft or - 3 ft or 4 ft..