Practice Test: Question Set - 14
1. Monel metal is an alloy of
- (A) Molybdenum and nickel
- (B) Nickel and copper
- (C) Molybdenum and aluminium
- (D) Molybdenum and zinc
2. Trough of an apron conveyor is made of
- (A) Lead lined concrete vessel
- (B) Wood
- (C) Metal
- (D) Either (b) or (c)
3. Centrifugal pump made of pyrex or glass can't be used to pump
- (A) Milk and fruit juices
- (B) Alkaline solutions
- (C) Dilute H2SO4 at room temperature
- (D) Brine
4. The process of coating steel sheets by zinc to improve its corrosion resistance is called
- (A) Calorizing
- (B) Galvanizing
- (C) Zincification
- (D) Tempering
5. Maximum carbon content in any variety of steel can be upto 1.3%. Steel containing 0.4% Carbon is not used for making
- (A) Nuts
- (B) Bolts
- (C) Chisels
- (D) Studs
6. Polythene (low or high density) containers are not corroded by
- (A) Sulphuric acid (10%) at room temperature
- (B) Nitric acid (95%) at room temperature
- (C) Sulphur trioxide at 60°C
- (D) Any of these
7. Thermoplastic resins are those polymers, which
- (A) Has decreased plasticity at increasing temperature
- (B) Cannot be moulded
- (C) Easily deform under pressure at high temperature
- (D) None of these
8. Hydrocyanic acid is not shipped in
- (A) Cast iron vessels
- (B) Steel cylinders
- (C) Aluminium containers
- (D) Monel drums
9. Metal at the top of the electromotive series is
- (A) Least active
- (B) Most stable
- (C) Most active
- (D) Most noble
10. Constantan used in thermocouples is an alloy of
- (A) Iron & copper
- (B) Copper & aluminium
- (C) Lead & tin
- (D) None of these
11. Pick out the wrong statement.
- (A) Metal/alloys having hexagonal crystal lattice structure are less malleable than those having cubic crystal lattice structure
- (B) Metal/alloys having body centered cubic (bcc) crystal lattice structure is stronger & less ductile than those having face centered cubic (fcc) crystal lattice structure
- (C) Tungsten has a body centered cubic (bcc) crystal lattice structure
- (D) Both ferritic & austenitic stainless steel has a face centered cubic (fcc) crystal structure
12. Nickel and molybdenum are the basic constituents of
- (A) Hastelloy
- (B) German silver
- (C) Inconel
- (D) Solder
13. Carbon is present in the uncombined (graphitic) form in case of
- (A) Cast iron
- (B) Steel
- (C) Ferroalloy
- (D) None of these
14. Coke oven walls are lined with __________ bricks.
- (A) Silica
- (B) Tar-dolomite
- (C) Low thermal conductivity
- (D) Fire clay
15. Molybdenum steels containing 0.15 to 0.40% molybdenum
- (A) Are prone to temper brittleness
- (B) Are used for automobile parts like gears, axle, shaft, bearings etc.
- (C) Have very poor fatigue resistance
- (D) Do not contain nickel or chromium or both
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