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Home » Engineering » Chemical Engineering » Aptitude Test - 33
1.Which of the following materials may prove unsuitable for handling acetic acid (glacial & anhydrous) at 40�C ?
A. Silicone rubber, teflon, porcelain and wood
B. Nickel, monel, stainless steel and graphite
C. Aluminium, copper, high silicon iron
D. Silicone rubber, teflon, porcelain and wood
2.The softest material just next to talc in the Mhos scale is____?
A. Quartz
B. Gypsum
C. Feldspar
D. Quartz
3.In drop forging process, the forging is done by dropping the _____ at high velocity?
A. Hammer
B. Workpiece
C. Die with hammer
D. Hammer
4.Thermal shield used in high powered nuclear reactor to protect the walls of the reactor from radiation damage is made of__?
A. Concrete
B. Steel
C. Zircaloy
D. Concrete
5.The preferred material of construction for storage tanks for 98% sulphuric acid is___?
A. Aluminium
B. Lead
C. Stainless steel 316
D. Aluminium
6.Which of the following has the least carbon percentage ?
A. Low carbon steel
B. Mild steel
C. Wrought iron
D. Low carbon steel
7.Locomotive boiler tubes are made of ______ alloys?
A. Arsenic copper
B. Magnesium
C. Aluminium
D. Arsenic copper
8.Wood is corroded by____?
A. Hydrochloric acid
B. SO2 (dry or wet)
C. Chlorine (dry or wet)
D. Hydrochloric acid
9.Pipes for bi-cycle frames are made of ___ steel?
A. Hot rolled
B. Chrome carbon
C. Cold rolled
D. Hot rolled
10.Fatigue strength of a material increases by__?
A. Having notches in the specimen
B. Rise in temperature
C. Under stressing the specimen
D. Having notches in the specimen
11.An elastic behaviour of materials is expressed in terms of___?
A. Hysteresis loop area
B. Stress-strain curve
C. Relaxation time
D. Hysteresis loop area
12.The formation of oxide film on a metal due to atmospheric exposure reduces its_?
A. Toughness
B. Stiffness
C. Creep limit
D. Toughness
13.Which of the following would not be a suitable material of construction for handling aqueous hydrofluoric acid (HF) at 100�C ?
A. Monel
B. Stainless steel
C. Graphite
D. Monel
14.Most suitable material of construction for the storage of concentrated nitric acid is__?
A. Cast iron
B. Monel
C. Karbate
D. Cast iron
15.A suitable material of construction to use with fuming sulphuric acid is___?
A. Carbon steel
B. Stainless steel type 304
C. Nickel
D. Carbon steel
16.Steel tower used for the storage of oleum___?
A. Is lined with lead
B. Need not be lined
C. Is lined with rubber
D. Is lined with lead
17.Nickel made/clad equipments are suitable for handling___?
A. Ammonia (both aqueous & anhydrous)
B. Sulphuric acid (concentrated)
C. Nitric acid & hydrochloric acid (concentrated)
D. Ammonia (both aqueous & anhydrous)
18.Aluminium as a material of construction suffers from the disadvantage of___?
A. Very high cost
B. Scarce availability
C. Rather low tensile strength
D. Very high cost
19.Which metal is protected by the layer of its own oxide ?
A. Iron
B. Silver
C. Calcium
D. Iron
20.In the Contact process of sulphuric acid manufacture, 98% acid cooler is made of__?
A. Stainless steel
B. Cast iron
C. Lead lined steel
D. Stainless steel
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