1201. Materials used for making permanent magnets containing iron and nickel are made by __________ technique.
A. Powder metallurgy
B. Casting
C. Forging
D. None of these
✅ The correct answer is option C.
Engineering
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1202. Which of the following material handling equipments is not suitable for moving materials in varying paths?
A. Hand trolley
B. Belt conveyor
C. Crane
D. Truck
✅ The correct answer is option B.
1203. Which of the following relatively employs the highest heat transfer surface area in a high pressure boiler ?
A. Airpreheater
B. Economiser
C. Steam superheater
D. Furnace water wall
✅ The correct answer is option A.
1204. Chlorine acts as a bleaching agent only in the presence of
A. Dry air
B. Pure oxygen
C. Moisture
D. Sunlight
✅ The correct answer is option C.
1205. Fog is an example of colloidal system of
A. Solid dispersed in gas
B. Solid dispersed in liquid
C. Liquid dispersed in gas
D. Gas dispersed in liquid
✅ The correct answer is option C.
1206. The maximum axial compression stress during cold upsetting of a cylinderical rod of radius (r) occurs at
A. The outer edge of the rod
B. R/3 from the centre
C. R/2 from the centre
D. The centre
✅ The correct answer is option D.
1207. Window panes of aeroplanes are normally made of
A. Perspex (PMMA)
B. Teflon (PTFE)
C. Bakelite (phenol formaldehyde)
D. Polystyrene
✅ The correct answer is option A.
1208. Liquid nitrogen containers can be made from
A. Ferritic stainless steel
B. HSLA steel
C. Titanium
D. Austenitic stainless steel
✅ The correct answer is option B.
1209. Compression ratio of an I.C. engine is the ratio of the
A. Clearance volume to the volume swept by piston per stroke
B. Volume of air in cylinder before compression to that after compression
C. Pressure after compression to that before compression
D. None of these
✅ The correct answer is option B.
1210. Lap joints are preferred over butt joints in soldering/brazing, because these joints are
A. Weaker in tension but stronger in shear
B. Weaker in shear but stronger in tension
C. Stronger in both shear and tension
D. The lap joints are easily made
✅ The correct answer is option D.