Practice Test: Question Set - 24
1. The difference between gross & net calorific values of fuel is due to the
- (A) Sensible heat carried away by the flue gases
- (B) Heat carried away by the steam from the moisture content of the fuel
- (C) Heat lost by radiation
- (D) Heat carried away by steam from the combustion of hydrogen in the
fuel
2. A solar cell converts the sunlight directly into __________ energy.
- (A) Thermal
- (B) Electrical
- (C) Mechanical
- (D) Chemical
3. The starting of a car takes time in winter, because the
- (A) Octane number of fuel is decreased
- (B) Fuel supply for ignition is not sufficient
- (C) Vaporization of the fuel is decreased
- (D) Pour point of fuel decreases
4. The friction factor for the turbulent fluid flow in a rough pipe does not depend upon the
- (A) Pipe roughness & pipe diameter
- (B) Fluid velocity
- (C) Type of flowing fluid
- (D) Both 'b' & 'c'
5. An alloy of Fe - 0.4 % C is
- (A) Cast iron
- (B) Hypo-eutectoid steel
- (C) Hyper-eutectoid steel
- (D) Eutectoid steel
6. Which of the following does not discharge the dust collected as a dry solid?
- (A) Electrostatic precipitator
- (B) Wet scrubber
- (C) Bag filter
- (D) Gravity settling chamber
7. Pressure required to increase the density of water by about 1% is __________ atmosphere.
- (A) 10
- (B) 50
- (C) 200
- (D) 1000
8. If the demand for an item is trebled and the order cost is reduced to one third, then the economic order quantity
- (A) Is trebled
- (B) Remains unchanged
- (C) Decreases by a factor of 3
- (D) Decreases by a factor of 1/3
9. Hydro-cyclone is a
- (A) Crusher
- (B) wet classifier
- (C) Dry classifier
- (D) Magnetic separator
10. A dense structure of grinding wheel is not used for the
- (A) Ductile material
- (B) Hard materials
- (C) Brittle materials
- (D) Finishing cuts
11. Tin based white metals are used, where bearings are subjected to
- (A) High pressure & load
- (B) Low pressure & load
- (C) High temperature
- (D) Large surface wear
12. Direct conversion of thermal energy to electrical energy is facilitated by the
- (A) Fuel cells
- (B) Photo voltaic cell
- (C) Magneto hydrodynamic generator
- (D) None of these
13. The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________ BTU/hr.
- (A) 100
- (B) 200
- (C) 1000
- (D) 2000
14. Annealing of white cast iron produces __________ iron.
- (A) Grey
- (B) Nodular
- (C) Malleable
- (D) Spheroidal
15. For preparation of porous bearings by powder metallurgy, preferred particle shape is
- (A) Spherical
- (B) Nodular
- (C) Irregular
- (D) No preferred shape
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