A. Iron
B. Copper
C. Steel
D. Nickel
✅ The correct answer is option B.
Engineering
Boost your preparation with the latest Engineering MCQs with answers and explanations. Our collection covers civil engineering, electrical engineering, mechanical engineering, electronics, software engineering, and other core subjects. These multiple-choice questions are designed for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, CSS, PMS, PEC exams, university entry tests, and job interviews. Practice online with updated Engineering MCQs to strengthen concepts, improve technical knowledge, and perform better in exams and recruitment tests.
392. Solution loss reaction occurs
A. In the blast furnace shaft
B. During pretreatment of hot metal
C. In the L.D. process
D. During deoxidation in the ladle
✅ The correct answer is option A.
393. Magnesium addition to cast iron increases its
A. Corrosion resistance
B. Creep strength
C. Ductility and strength in tension
D. Hardness
✅ The correct answer is option C.
394. Increasing sulphur content in pig iron tends to make it
A. Soft
B. Hard
C. Tough
D. Ductile & malleable
✅ The correct answer is option B.
395. A material having good damping property is likely to have
A. Greater defect density
B. Fine grained structure
C. Lesser defect density
D. High tensile strength
✅ The correct answer is option A.
396. Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at
A. High vacuum
B. Zero pressure
C. 0°K
D. Earth
✅ The correct answer is option B.
397. The suction and delivery pressure for a two stage compressor are 1 and 25 atm respectively. The intermediate stage pressure would be around __________ atm.
A. 5
B. 10
C. 15
D. 20
✅ The correct answer is option A.
398. For efficient performance of a blast furnace, the extent of reduction of Wustite (FeO) should be
A. 100% indirect reduction
B. 100% direct reduction
C. 50-60% indirect reduction
D. 30-40% indirect reduction
✅ The correct answer is option C.
399. Which of the following is the most elastic material?
A. Plastic
B. Glass
C. Steel
D. Rubber
✅ The correct answer is option C.
400. Fatigue strength of a material can not be increased by
A. Cold working
B. Hot working
C. Shot peening
D. Any of these
✅ The correct answer is option B.