1. A fire tube boiler is limited to a maximum steam pressure of about __________ kg/cm².
A. 6
B. 18
C. 38
D. 52
✅ The correct answer is option B.
Chemical Engineering
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2. Transformer cores are normally made from
A. Soft ferrites
B. High purity iron
C. Grain oriented Fe-Si alloy
D. Al-Ni-Co alloy
✅ The correct answer is option C.
3. In which of the following reactions, application of vacuum will help ?
A. Number of gas molecules in the product side is more than that on the reactant side
B. Number of gas molecules in the reactant side is more than that on the product side
C. Number of gas molecules are the same on both the reactant & the product side
D. None of the above
✅ The correct answer is option D.
4. The minimum and the maximum number of members required to form a Private Limited Joint Stock Company are respectively
A. 7 and 30
B. 10 and 50
C. 2 and 50
D. 13 and 55
✅ The correct answer is option C.
5. Boiler tube size is specified by its thickness and __________ diameter.
A. Outside
B. Inside
C. Mean
D. None of these
✅ The correct answer is option A.
6. Out of the following, the best material capable of withstanding shock & vibration without the danger of cracking is
A. Malleable iron
B. Grey cast iron
C. Chilled cast iron
D. White cast iron
✅ The correct answer is option A.
7. As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the __________ joint.
A. Butt
B. Lap
C. Welded
D. None of these
✅ The correct answer is option B.
8. In multipass welds, shot peening is done after each pass to
A. Close the surface porosity
B. Break the continuity of columnar grains
C. Flatten the weldment
D. Introduce texture in the weld
✅ The correct answer is option A.
9. Machinability of hard alloys & tool steels is improved by
A. Spherodising
B. Annealing
C. Tempering
D. Normalising
✅ The correct answer is option B.
10. The leaching solvent used in Baeyer’s process for the purification of bauxite is
A. Ammonium hydroxide
B. Sodium carbonate
C. Sodium hydroxide
D. Ammonium carbonate
✅ The correct answer is option B.