735. A fine grained grinding wheel should not be used for grinding __________ materials.
A. Hard
B. Brittle
C. Soft & ductile
D. None of these
✅ The correct answer is option C.
738. If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity
A. Is trebled
B. Remains unchanged
C. Decreases by a factor of √3
D. Decreases by a factor of 1/3
✅ The correct answer is option B.
674. Isotropic materials have the same __________ in all the directions.
A. Thermal properties
B. Elastic properties
C. Stresses
D. All of the above
✅ The correct answer is option B.
677. Swaging is a/an __________ operation.
A. Piercing
B. Forging
C. Extrusion
D. Drawing
✅ The correct answer is option B.
680. Which of the following is the most suitable abrasive for grinding high tensile strength materials?
A. Silicon carbide
B. Corundum
C. Aluminium oxide
D. Boron carbide
✅ The correct answer is option C.
683. Lead is added to 60:40 brass primarily to improve
A. Machinability
B. Corrosion resistance
C. Fluidity
D. Strength
✅ The correct answer is option A.
686. Value of a material is usually considered as a relationship between
A. Cost and profit
B. Utility and appearance
C. Utility and cost
D. Reliability and utility
✅ The correct answer is option C.
689. Aluminium oxide (an abrasive) is used for grinding
A. Ceramics
B. High speed steel
C. Cemented carbide
D. None of these
✅ The correct answer is option B.
692. Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter.
A. Bomb
B. Throttling
C. Junker’s
D. Boy’s
✅ The correct answer is option B.
694. Which of the following is not an ore of aluminium?
A. Troosite
B. Kaolin
C. Alunite
D. Cryolite
✅ The correct answer is option A.