Practice Test: Question Set - 50
1. The 'laughing gas' is
- (A) Nitrous oxide
- (B) Nitric oxide
- (C) Nitrogen trioxide
- (D) Nitrogen pentoxide
2. Natural water contains approximately __________ percent of heavy water.
- (A) 0.015
- (B) 0.71
- (C) 1.2
- (D) 3.5
3. Heat transfer by __________ is almost absent in case of fluidized bed drying operation.
- (A) Radiation
- (B) Conduction
- (C) Convection
- (D) Both (b) & (c)
4. If a solid is compressed adiabatically in its elastic range, its __________ remains constant
- (A) Internal energy
- (B) Enthalpy
- (C) Entropy
- (D) Temperature
5. What is the range of tempering temperature (°C) for most of the materials?
- (A) 75-100
- (B) 200-300
- (C) 350-450
- (D) 500-600
6. At absolute zero temperature, for any reaction involving condensed phases
- (A) Δ G° = 0, Δ H° = 0
- (B) Δ H° = 0, Δ S° = 0
- (C) Δ S° = 0, Δ E° = 0
- (D) Δ S° = 0, Δ Cp° = 0
7. Boiler draught of 10 mm water column is equivalent to
- (A) 1 kgf/m2
- (B) 10 kgf/m2
- (C) 10 kgf/mm2
- (D) 1 kgf/mm2
8. Insulation of liquid surface can be achieved by __________ on top of its surface.
- (A) Floating hollow polypropylene spheres
- (B) Spraying alumina powder
- (C) Putting cement
- (D) None of these
9. Surface tension of a liquid
- (A) Is due to intermolecular forces of cohesion
- (B) Decreases with rise in temperature
- (C) Is responsible for the spherical shape of an isolated liquid drop
- (D) All (a), (b) & (c)
10. The activity co-efficient of the solute in a dilute solution
- (A) Decreases with the increase of concentration of the solute
- (B) Increases with the increase of concentration of the solute
- (C) Remains constant
- (D) Is unity at infinite dilution
11. Gas turbine normally employs a constant __________ cycle.
- (A) Pressure
- (B) Temperature
- (C) Volume
- (D) None of these
12. __________ property of a material is determined by the Herbert Pendulum device.
- (A) Hardness
- (B) Tensile
- (C) Toughness
- (D) Compressive
13. Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________ method.
- (A) Diminishing balance
- (B) Sinking fund
- (C) Multiple straight line
- (D) Sum of the years digit
14. Pick out the wrong statement.
- (A) Molecules with symmetrical arrangements (e.g. CH4 or
CCl4) are non-polar
- (B) Generally, non-polar compounds are chemically inactive, conduct
electricity poorly and do not ionize
- (C) Most of the hydrocarbons are non-polar
- (D) None of these
15. An example of unsteady non uniform flow is the flow of liquid under pressure through a
- (A) Tapering pipe at constant flow rate
- (B) Tapering pipe at either decreasing or increasing flow rate
- (C) Long pipeline of constant diameter
- (D) None of these
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