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.Management Sciences
Category: Chemical Engineering Basics
Shrinkage allowance on pattern is provided to compensate for shrinkage when the _____________________?
A. Metal changes from liquid state to solid state at freezing temperature
B. Solid phase temperature drops from freezing temperature to the room temperature
C. Liquid metal temperature drops from pouring temperature to room temperature
D. Liquid metal temperature drops from pouring temperature to freezing temperature
Which of the following if present in iron ore, enhances its value ?
A. Alumina
B. Alkali oxide
C. Lime & Magnesia
D. None of these
The product out from a cupola is called ____________________?
A. Wrought iron
B. Pig iron
C. Cast iron
D. None of these
Moist climate is the most favourable factor in the site selection far a_________________?
A. Steel plant
B. Textile factory
C. Petroleum refinery
D. Coke oven battery
Oxide layer formed on the non-ferrous metal surface after its annealing is__________________?
A. Removed by acid pickling
B. Hammered into the surface
C. Removed with coarse emery cloth
D. Left as such to protect the surface
For the Stoke’s law to be valid in the case of a falling sphere in a fluid, the_____________________?
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
Cold chisel‟s hammers are made of___________________?
A. High speed steel
B. High carbon steel
C. Forged steel
D. Mild steel
Adhesives__________________?
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
Moist air is cooled along the line of constant ________________ , when it is passed over a cold & dry cooling coil, such that no condensation occurs ?
A. Enthalpy
B. Relative humidity
C. Wet bulb temperature
D. Dew point temperature
In electrical resistance welding, distortion results from the use of improper________________?
A. Clamping methods
B. Electrodes
C. Current
D. Filler material
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