A. Reduced chance of gas porosity
B. Greater dimensional stability of the casting
C. Uniform flow of molten metal into the mould cavity
D. Less sand expansion type of casting defect
Related Mcqs:
- Sand used to stop the green sand from sticking to the pattern is termed as the ______________ sand?
A. Parting
B. Synthetic
C. Loam
D. Dry - The passage between the nozzle and the _______________________ is called ‘sprue’ in case of injection moulding?
A. Runner
B. Cylinder
C. Mold
D. None of these - An approximately _____________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section ?
A. Adiabatic
B. Isothermal
C. Isentropic
D. Isochoric - 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 - During decarburising of a plain carbon steel, the thickness of ferrite layer growth is proportional to____________________?
A. Time
B. Square root of time
C. Square of time
D. Cube of time - Function of gear box is to____________________?
A. Reduce the speed
B. Obtain variable speed
C. Increase the speed
D. Produce high torque - Preheating before welding is done to____________________?
A. Make the plate softer
B. Burn oil & grease sticking to plate surfaces
C. Avoid plate distortion
D. Prevent cold cracks - A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to____________________?
A. √(Particle diameter)
B. Particle diameter
C. (Particle diameter)2
D. (Particle diameter)3 - An example of unsteady non uniform flow is the flow of liquid under pressure through a__________________?
A. Tapering pipe at constant flow rate
B. Tapering pipe at either decreasing or increasing flow rate
C. Long pipeline of constant diameter
D. None of these - Batch process is preferred over continuous process, when the___________________?
A. Product yields and quality cannot be achieved in continuous process, because of long
residence time
B. Sales demand of product is not steady
C. Same equipment cannot be used for several processes of the same nature
D. All (A), B. & (C)
