Practice Test: Question Set - 41
1. The amount of different substances produced, when the same quantity of electricity is passed through different solutions are proportional to their
- (A) Equivalent weight
- (B) (Equivalent weight)2
- (C) Molecular weight
- (D) (Molecular weight)2
2. Viscoelastic behavior is observed in __________ materials.
- (A) Non-crystalline organic polymeric
- (B) Ceramic
- (C) All crystalline
- (D) All amorphous
3. __________ furnace is generally used in the non-ferrous foundries.
- (A) Direct arc
- (B) Indirect arc
- (C) Resistance
- (D) Induction
4. Load cells used for the measurement of weight has
- (A) Compact & rugged construction with an accuracy of 0.1 to 1%
- (B) No moving parts and incurs negligible deflection under load
- (C) Provision of thermal compensation and is hermetically sealed
- (D) All 'a', 'b' & 'c'
5. Volumetric composition of flue gas analyzed with the Orsat apparatus is:
CO2 = 12%, O2 = 8%, CO = nil, N2 = 80%. This flue gas composition indicates that
- (A) Pure oxygen has been used for combustion
- (B) Nitrogen percentage in the fuel is very high
- (C) Excess air has been used for combustion
- (D) Hydrogen is not present in the fuel
6. The order of a chemical reaction
- (A) Can be determined only experimentally
- (B) Can be determined from the stoichiometry
of the reaction
- (C) Cannot be zero
- (D) Can be fractional
7. In a good rimming steel
- (A) Carbon and silicon should be low
- (B) Silicon should be low but carbon should be high
- (C) Both silicon & carbon should be high
- (D) Silicon should be high but carbon should be low
8. With increase in temperature, the electrical conductivity of a __________ decreases.
- (A) Semi-conductor
- (B) Metal or alloy
- (C) Dielectric
- (D) None of these
9. Out of the following the refractive index is the highest for
- (A) Glass
- (B) Diamond
- (C) Brine
- (D) Kerosene
10. For an ideal gas, Cp - Cv is
- (A) R
- (B) -R
- (C) 0
- (D) (3/2) R
11. Which of the following if present in iron ore, enhances its value?
- (A) Alumina
- (B) Alkali oxide
- (C) Lime & Magnesia
- (D) None of these
12. Pick out the wrong statement.
- (A) Seam welding, projection welding & spot welding are the classification
of electrical resistance welding
- (B) Electrode tip in spot welding is of copper and the tip diameter
should be equal to t (where, t = plate
thickness to be welded)
- (C) In spot welding, two pieces to be joined are
overlapped and placed between two electrodes
- (D) Mild steel sheet cannot be spot welded
13. Name the safety device used to protect the boiler, when the water level falls below a minimum level.
- (A) Blow down valve
- (B) Blow off cock
- (C) Fusible plug
- (D) Safety valve
14. Which of the following materials has the poorest electrical conductivity?
- (A) Carbon
- (B) Aluminium
- (C) Silver
- (D) Stainless steel
15. __________ rubber is generally used for making 'O' rings used for vacuum sealings.
- (A) Natural
- (B) Neoprene
- (C) Butadiene
- (D) Nitrile
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