The type of joint used for metallic sewer is __________
(a) Collar joint
(b) Flexible joint
(c) Mechanical joint
(d) Simplex joint
The question was asked by my college professor while I was bunking the class.
This intriguing question originated from Joints and Shapes of Sewers and Cleaning, Maintenance and Ventilation of Sewer in chapter Construction of Sewers, Sewer Appurtenances and Sewage Pumping of Environmental Engineering