With increase in steam pressure, its specific volume decreases ____________________?
(A) Rapidly first and then slowly
(B) Linearly
(C) Slowly first and then rapidly
(D) Exponentially
Powder metallurgy process does not make metal powder by_________________________?
(A) Atomisation
(B) Grinding/milling
(C) Hammering
(D) Electrolytic deposition
Vernier calipers cannot be used to measure the______________________?
(A) I.D. & O.D. of the shaft
(B) Thickness of parts
(C) Depth of holes
(D) Clearance between two mating surfaces
Heating the Hypo-eutectoid steels to 30°C above the upper critical temperature line, soaking at that temperature and then cooling slowly to the room temperature to form a pearlite & ferrite structure is called_______________________?
(A) Tempering
(B) Hardening
(C) Annealing
(D) Normalising
The difference in one unit of Rockwell hardness number corresponds to a difference in the depth of indentation of ______________ mm ?
(A) 0.001
(B) 0.01
(C) 0.002
(D) 0.02
Electrical conductivities of semi-conductors are of the order of ______________ ohm/cm ?
(A) 10-3
(B) 103
(C) 10-15
(D) 1015
Maximum hardenability of steel depends upon its_______________________?
(A) Chemical composition
(B) Carbon content
(C) Grain size
(D) Alloying elements content
Angular displacement can be measured suitably by a______________________?
(A) Shaft encoder
(B) Linear variable differential transducer (LVDT)
(C) Stroboscope
(D) Tachometer
Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as_________________?
(A) Gr0.25, Gr
(B) Gr0.25, Gr0.33
(C) Gr, Gr0.25
(D) Gr0.33, Gr0.25
Titanium is added to molten aluminium alloys before casting for the purpose of_____________________?
(A) Grain refinement
(B) Increasing corrosion resistance
(C) Reducing porosity
(D) Improving fluidity