Kerala PSC Tradesman Plumber Paper 2016

Kerala PSC Tradesman Plumber Paper 2016

Which valve is provided at intervals in long mains to prevent back pressure on the pump and in raising lines to prevent backflow of water?
(a) Gate valve
(b) Mud valve
(c) Reflux valve
(d) Pressure relief valve

What distribution system is suitable for towns growing irregularly ?
(a) Dead End System
(b) Grid Iron System
(c) Radial System
(d) Ring System

Spun Iron pipes used in water supply shall confirm to IS Number is
(a) 1534
(b) 1535
(c) 1536
(d) 1537

What fittings are used in pipelines, that easy to dismantle and repair ?
(a) Elbow
(b) Union
(c) Reducer
(d) Cap

What is the disadvantage of GI pipe ?
(a) It can be easily joined after threading
(b) It is easy to detach joint
(c) This pipe can be easily affected by acid or alkaline water
(d) It will not get rusted easily because of galvanisation

Which vice is used for holding round sections of metals, tubes and pipes?
(a) Pipe vice
(b) Bench vice
(c) Pin vice
(d) Hand vice

Soft solders whose melting points are below
(a) 300 degree Celcius
(b) 350 degree Celcius
(c) 400 degree Celcius
(d) 45o degree Celcius

The try square is used to
(a) Check the squareness
(b) Check the flatness
(c) Markline at 90 degree to the edges of work piece
(d) All the above

Calipers are classified according to thier
(a) Joints and thickness
(b) Thickness and width
(c) Joints and legs
(d) Leg and width

Metals which contain Iron as major content are called
(a) Non Ferrous Metals
(b) Ferrous Metals
(c) Non Metal
(d) Alloy

Which is used to cut external threads on cylindrical work pieces ?
(a) tap and wrench
(b) pipe wrench
(c) spanner
(d) die and stock

Melting point of Bronze is
(a) 1083 degree Celcius
(b) 1005 degree Celcius
(c) 983 degree Celcius
(d) 660 degree Celcius

Rolling thin layer of metal on to a base metal is known as
(a) Browning
(b) Enamelling
(c) Electroplating
(d) Cladding

Ordinary Portland cement is available in, How many grades ?
(a) 2
(b) 3
(c) 4
(d) 5

___________C.I cover provided for manholes constructed within width of road under vechicular traffic.
(a) Light duty
(b) Medium duty
(c) Heavy duty
(d) None of these