Projection welding & stud welding is categorised as the _______________ welding?
(A) Pressure
(B) Thermit
(C) Resistance
(D) Arc
The following thermocouple may be used for measuring temperature upto 1873°K__________________?
(A) Chromel-alumel
(B) Copper-constantan
(C) Platinum-platinum rhodium
(D) Iron-constantan
Drossing is a _______________________ operation?
(A) Smelting
(B) Dressing
(C) Roasting
(D) Dressing
Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel & copper having relatively higher melting points. Which of the following is not a hot dipping process ?
(A) Galvanising
(B) Tinning
(C) Sherardizing
(D) None of these
The underground well of a bio gas plant is called the________________?
(A) Septic tank
(B) Oxidation well
(C) Digestor
(D) Lagoon
A fire tube boiler is limited to a maximum steam pressure of about ______________ kg/cm2 ?
(A) 6
(B) 18
(C) 38
(D) 52
Water hammer is caused in steam carrying pipelines, because of ______________________?
(A) Partial condensation of steam
(B) Vibration of the pipeline
(C) High degree of superheat of steam
(D) Its exposure to torrential rain
The mechanism involved in the removal of metal in drilling operation is by_________________?
(A) Compression
(B) Extrusion
(C) Shearing
(D) Both B & C
Out of the following _______________ iron has the best capability to bear sudden & excessive shocks?
(A) White
(B) Cast
(C) Wrought
(D) Pig