Steam Nozzles and Boilers Mechanical Engineering Questions - Set 32

Practice Test: Question Set - 32

1. The shell diameter of a Locomotive boiler is
    (A) 1 m
    (B) 1.5 m
    (C) 2 m
    (D) 2.5 m

2. The equivalent evaporation of a boiler is a measure to compare
    (A) The given boiler with the model
    (B) The two different boilers of the same make
    (C) Two different makes of boilers operating under the same operating conditions
    (D) Any type of boilers operating under any conditions

3. Water at pressure of 4 kg/cm² and 160°C temperature when exposed to atmosphere will
    (A) Boil
    (B) Flash i.e. get converted into steam
    (C) Remain as it was
    (D) Cool down

4. Locomotive type' boiler is
    (A) Horizontal multi-tubular water tube boiler
    (B) Water wall enclosed furnace type
    (C) Vertical tubular fire tube type
    (D) Horizontal multi-tubular fire tube type

5. The function of injector used in small steam plants is to
    (A) Create vacuum in furnace
    (B) Create vacuum at turbine exhaust
    (C) Pump feed water
    (D) Dose chemicals in feed water

6. The function of injector used in small capacity boilers is to
    (A) Create vacuum
    (B) Inject chemical solution in feed pump
    (C) Pump water, similar to boiler feed pump
    (D) Add make up water in the system

7. Caking coals are those which
    (A) Form lumps or masses of coke
    (B) Burn freely
    (C) Show little or no fusing action
    (D) Burn completely

8. The balanced draft furnace is one using
    (A) Induced draft fan and chimney
    (B) Induced draft fan and forced draft fan
    (C) Forced draft fan and chimney
    (D) Any one of the above

9. Reheating of steam under ideal conditions takes place at constant
    (A) Entropy
    (B) Enthalpy
    (C) Pressure
    (D) Temperature

10. If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by
    (A) Throttling calorimeter
    (B) Separating calorimeter
    (C) Combined separating and throttling calorimeter
    (D) Bucket calorimeter

11. The specific heat of superheated steam in kcal/kg is generally of the order of
    (A) 0.1
    (B) 0.3
    (C) 0.5
    (D) 0.8

12. On Mollier chart, flow through turbine is represented by
    (A) Horizontal straight line
    (B) Vertical straight line
    (C) Straight inclined line
    (D) Curved line

13. A wet vapor can be completely specified by
    (A) Pressure only
    (B) Temperature only
    (C) Dryness fraction only
    (D) Pressure and dryness fraction

14. Water boils when its vapor pressure
    (A) Equals that of the surroundings
    (B) Equals 760 mm of mercury
    (C) Equals to atmospheric pressure
    (D) Equals the pressure of water in the container

15. An ideal regenerative cycle is
    (A) Equal to Carnot cycle
    (B) Less than Carnot cycle
    (C) More than Carnot cycle
    (D) Could be anything

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