Which of the following is used to produce draught in the locomotive boilers ?
(A) Chimney
(B) Induced draught fan
(C) Forced draught fan
(D) Steam jet arrangement
Which of the following materials has the least scrap value ?
(A) Aluminium
(B) Stainless steel
(C) Brass
(D) Copper
Young’s modulus of a material is the measure of its ___________________?
(A) Stiffness
(B) Malleability
(C) Creep resistance
(D) Tensile strength
Tumbling is the process of improving the ________________ of the materials/parts ?
(A) Surface finish
(B) Fatigue limit
(C) Creep limit
(D) Surface cleanliness
Which of the following is not categorised as the ore agglomeration process ?
(A) Nodulising
(B) Pelletising
(C) Balling
(D) Briquetting
In Newton’s law of viscosity, which states that the shear stress is proportional to the _____________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, Vg = velocity gradient) ?
(A) V2
(B) 1/V2
(C) 1/Vg
(D) Vg
Sub zero treatment of steel is done to____________________?
(A) Suppress martensite transformation
(B) Enhance its working performance in sub zero atmosphere
(C) Reduce the retained austenite in hardened steel
(D) Induce temper brittleness after its hardening
The most detrimental impurity in high pressure boiler feed water is ___________________?
(A) Suspended salt
(B) Dissolved salt
(C) Silica
(D) Turbidity
Boiler tube size is specified by its thickness and _____________________ diameter ?
(A) Outside
(B) Inside
(C) Mean
(D) None of these
Dowtherm is a____________________?
(A) High temperature heating medium (a petroleum product)
(B) Product of coal tar distillation
(C) Very heat sensitive material
(D) None of these