Category: Chemical Engineering Basics

A. Removed by acid pickling
B. Hammered into the surface
C. Removed with coarse emery cloth
D. Left as such to protect the surface

A. Reynolds number (based on sphere diameter) should be < 1
B. Flow around the sphere should be in turbulent region
C. Sphere must be metallic
D. Fluid density should be constant

A. High speed steel
B. High carbon steel
C. Forged steel
D. Mild steel

A. Can’t be used in the form of pressure sensitive tapes
B. Can’t join two dissimilar metals
C. Cure instantaneously after application on a surface
D. None of these

A. Enthalpy
B. Relative humidity
C. Wet bulb temperature
D. Dew point temperature

A. Clamping methods
B. Electrodes
C. Current
D. Filler material

A. Cast iron
B. Hypo-eutectoid steel
C. Hyper-eutectoid steel
D. Eutectoid steel

A. Decreases but dew point remains constant
B. Increases but dew point remains constant
C. Increases & the dew point decreases
D. Decreases & the dew point increases

A. Tensile strength
B. Compressive strength
C. Young’s modulus
D. Thermal co-efficient of expansion

A. Almost same for all metals
B. Different for different metals
C. Less for low melting point metals
D. Less for high melting point metals