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MCQs 1: Cochran boiler is a__________________?

horizontal fire-tube boiler horizontal water-tube boiler veritcal water-tube boiler vertical fire tube boiler forced circulating boiler
Answer Explanation

MCQs 2: During polytropic process_________________?

heat transfer takes place across cylinder walls work is done steam may be wet, dry or superheated after expansion all of the above none of the above
Answer Explanation

MCQs 3: The evaporation of 15.653 kg of water per hour from and at 100°C is called_________________?

evaporative capacity factor of evaporation equivalent evaporation one boiler h.p. boiler efficiency
Answer Explanation

MCQs 4: Mechanical equivalent of heat for 1 kcal or Joule’s equivalent is equal to_________________?

421 kgm 421 kgm 539 kgm 102 kgm 75 kgm
Answer Explanation

MCQs 5: Pick up the wrong statement about critical condition of steam___________________?

latent heat is zero liquid directly becomes steam specific volume of steam and liquid is same this is the maximum pressure limit all properties of liquid and steam are same
Answer Explanation

MCQs 6: Adiabatic process is________________?

essentially an isentropic process non-heat transfer process reversible process constant temperature process constant enthalpy process
Answer Explanation

MCQs 7: While steam expands in turbines, theoretically the entropy________________?

remains constant increases decreases behaves unpredictably none of the above
Answer Explanation

MCQs 8: At which pressure the properties of water and steam become identical_________________?

0.1 kg/cm2 1 kg/cm2 100 kg/cm2 225.6 kg/cm2 it is never possible
Answer Explanation

MCQs 9: The latent heat of steam with increase of pressure__________________?

remains same increases decreases behaves unpredictably none of the above
Answer Explanation

MCQs 10: The pressure at which latent heat of vaporisation of water is zero, is_________________?

below atmospheric pressure 1 kg/cm2 100 kg/cm2 170 kg/cm2 225.6 kg/cm2
Answer Explanation

MCQs 11: In a throttling process________________?

steam temperature remaisn constant steam pressure remains constant steam enthalpy remains constant steam entropy remains constant steam volume remains constant
Answer Explanation

MCQs 12: Water at pressure of 4 kg/cm2 and 160°C temperature when exposed to atmosphere will_________________?

boil flash i.e. get converted into steam remain as it was cool down none of the above
Answer Explanation

MCQs 13: The bituminous coal is non-caking if its carbon content is_______________?

78-81% 81-85% 85-90% 90-95% 95-100%.
Answer Explanation

MCQs 14: On Millier chart, the constant pressure lines_________________?

diverge from left to right diverge from right to left are equally spaced throughout first rise up and then fall none of the above
Answer Explanation

MCQs 15: On Mollier chart, flow through turbine is represented by ________________?

horizontal straight line vertical straight line straight inclined line curved line none of the above
Answer Explanation

MCQs 16: The difference between cornish boiler and lancashire boiler is that_________________?

former is fire tube type and latter is water tube type boiler former is water tube type and latter is fire tube type former contains one fire tube and latter contains two fire tubes none/of the above
Answer Explanation

MCQs 17: If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by___________________?

throttling calorimeter separating calorimeter combined separating and throttling calorimeter bucket calorimeter none of the above
Answer Explanation

MCQs 18: The number of drums in Benson steam generator is_________________?

one two one steam drum and one water drum no drum none of the above
Answer Explanation

MCQs 19: The fusible plug in small boilers is located ________________?

in the drum in the fire tubes above steam dome over the combustion chamber at the inlet of chimney
Answer Explanation

MCQs 20: Boiler H.P. is defined as the ________________ ?

steam evaporation rate per kg of fuel fired work done in evaporating 1 kg of steam per hour from and at 100°C into dry saturated steam the evaporation of 15.65 kg of water per hour from and at 100°C into dry saturated steam work done by 1 kg of steam at saturation condition heat consumed in evaporating 1 kg water at 0°C to steam at 100°C and 1.033 kg/cm pressure
Answer Explanation

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