Practice Test: Question Set - 29
1. Which of the following alloy steels is the most suitable for making gun barrels and projectiles?
- (A) Tungsten steel
- (B) Molybdenum steel
- (C) Nickel-chrome steel
- (D) Cobalt steel
2. White cast iron is not
- (A) Malleable
- (B) Whitish in color
- (C) Brittle
- (D) Strong and hard
3. Specify the material of construction suitable for handling concentrated HNO3 at 100°C.
- (A) High silicon iron, Kel-F and Teflon
- (B) Tin and wood
- (C) Silicone rubber
- (D) Stainless steel
4. 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) Rubber lined steel
5. Nickel (56%) and molybdenum (17%) alloys are called
- (A) Monel
- (B) Hastelloy C
- (C) Inconel
- (D) Bronzes
6. Which metal is protected by the layer of its own oxide?
- (A) Iron
- (B) Silver
- (C) Calcium
- (D) Aluminium
7. Carbon percentage is the same in cast iron and
- (A) Wrought iron
- (B) Pig iron
- (C) Mild steel
- (D) High silicon (14%) iron
8. Aluminium as a material of construction suffers from the disadvantage of
- (A) Very high cost
- (B) Rather low tensile strength
- (C) Very low strength to weight ratio
- (D) Scarce availability
9. Babbitt metals used for making bearings are
- (A) Tin or lead based alloys
- (B) Short of anti-frictional properties
- (C) Having homogenous microstructure
- (D) Yellow metals
10. Nickel made/clad equipments are suitable for handling
- (A) Ammonia (both aqueous & anhydrous)
- (B) Fruit juices, milk & its products and caustic soda solution
- (C) Nitric acid & hydrochloric acid (concentrated)
- (D) Sulphuric acid (concentrated)
11. Acetylene gas holder is made of
- (A) Copper
- (B) Cast iron
- (C) Steel
- (D) Monel metal
12. 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 acid-proof bricks
13. Presence of 0.3 to 0.5% arsenic in copper increases its
- (A) Ductility
- (B) Malleability
- (C) Tenacity & hardness
- (D) Electrical conductivity
14. A suitable material of construction to use with fuming sulphuric acid is
- (A) Carbon steel
- (B) Stainless steel type 304
- (C) Nickel
- (D) Monel
15. Photographic plates are coated with
- (A) Silver nitrate
- (B) Silver halide
- (C) Calcium silicate
- (D) Metallic silver
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