Most Important & Most Repeated MCQs

Heinrich Hertz proved first time presence of electromagnetic waves.

An American Scientist, Joseph Henry invented first electric doorbell.

Faisal Masjid was opened for public in 1986.
On 18th June 1988, First Prayer was held in Faisal Masjid.

Proton was discovered by Ernest Rutherford in 1900s.
Joseph John Thomas discovered Electron in 1897.

Flexibility
Durability
Resistance to rot
Frictional Loss
Weight

Roll Method
Dutch Roll Method
Flake Roll
Figure of Eight Method
Roll Method
Its Simple method on ground. This Roll Method starts from Female side coupling.
Dutch Roll Method
There will be distance of 3 feet between male and female end and both will be same side.
Flaking Method
This method is often used in Hospitals.
Figure of Eight Method
In this method coupling will be in the center of 8.

The coupling diameter is 2.5 inch.
Fire Hose can bear temperature upto 60 C.

There is used Canvas, Rubber and Polyester in Hose manufacturing.

Delivery Hose
Suction Hose