Chemical Engineering Mcqs

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

Answer

Submitted By :Ali Uppal

Powder metallurgy process does not make metal powder by_________________________?

• (A)  Atomisation
• (B)  Grinding/milling
• (C)  Hammering
• (D)  Electrolytic deposition

Answer

Submitted By :Ali Uppal

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

Answer

Submitted By :Ali Uppal

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

Answer

Submitted By :Ali Uppal

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

Answer

Submitted By :Ali Uppal

Electrical conductivities of semi-conductors are of the order of ______________ ohm/cm ?

• (A)  10-3
• (B)  103
• (C)  10-15
• (D)  1015

Answer

Submitted By :Ali Uppal

Maximum hardenability of steel depends upon its_______________________?

• (A)  Chemical composition
• (B)  Carbon content
• (C)  Grain size
• (D)  Alloying elements content

Answer

Submitted By :Ali Uppal

Angular displacement can be measured suitably by a______________________?

• (A)  Shaft encoder
• (B)  Linear variable differential transducer (LVDT)
• (C)  Stroboscope
• (D)  Tachometer

Answer

Submitted By :Ali Uppal

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

Answer

Submitted By :Ali Uppal

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

Answer

Submitted By :Ali Uppal