Heat Engines MCQs | Page - 3

Dear candidates you will find MCQ questions of Heat Engines here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

📊 Heat Engines
Q. A coal contains 3.5% sulphur by weight, as fired, and all the sulphur may be assumed to go to formation of sulphur dioxide. How many tonnes of SO2 are produced per day of the firing rate is 35 tonnes per hour
  • (A) 54.8
  • (B) 60.8
  • (C) 48.8
  • (D) 58.8
💬 Discuss
✅ Correct Answer: (D) 58.8
📊 Heat Engines
Q. The total length of 40 mid-ordinates on a simple steam engine indicator diagram is 17 cm. The pressure scale is 0.6 kg/sq-cm. The mean effective pressure would be
  • (A) 1.0 kg/sq-cm
  • (B) 1.7 kg/sq-cm
  • (C) 1.0 kg/sq-cm
  • (D) 10.2 kg/sq-cm
💬 Discuss
✅ Correct Answer: (C) 1.0 kg/sq-cm
📊 Heat Engines
Q. Free air is air at
  • (A) 1 kg/cm2 and 20?C
  • (B) 1 kg/cm2 and atmospheric temperature
  • (C) 1 kg/cm2 and 27?C
  • (D) Atmospheric conditions at any specific location
💬 Discuss
✅ Correct Answer: (D) Atmospheric conditions at any specific location
📊 Heat Engines
Q. De-Laval turbine is mostly used
  • (A) For small powers at high speeds
  • (B) For small powers at low speeds
  • (C) For high powers at low speeds
  • (D) For high powers at high speeds
💬 Discuss
✅ Correct Answer: (A) For small powers at high speeds
📊 Heat Engines
Q. Air fuel ratio for a jet engine is of the order of
  • (A) 15 ; 1
  • (B) 20 ; 1
  • (C) 60 ; 1
  • (D) 400 ; 1
💬 Discuss
✅ Correct Answer: (C) 60 ; 1
📊 Heat Engines
Q. Calorific value of methane gas can be determined by
  • (A) Bomb calorimeter
  • (B) Bunsen's apparatus
  • (C) Orsat's apparatus
  • (D) None of the above
💬 Discuss
✅ Correct Answer: (D) None of the above
📊 Heat Engines
Q. Which one of the following factors will not assist in improving thermal efficiency of a compression ignition engine?
  • (A) Fine atomisation and even distribution of fuel
  • (B) Minimum heat loss during combustion
  • (C) Clear exhaust
  • (D) High surface to volume ratio
💬 Discuss
✅ Correct Answer: (D) High surface to volume ratio
📊 Heat Engines
Q. A diesel power plant is best suited as
  • (A) Base load plant
  • (B) Stand by plant
  • (C) Peak load plant
  • (D) General purpose plant
💬 Discuss
✅ Correct Answer: (B) Stand by plant
📊 Heat Engines
Q. Excessive moisture in steam in a steam turbine is likely to result in
  • (A) Erosion of turbine blades
  • (B) Excess work done by rotor due to momentum of water particles
  • (C) Overheating of turbine blaces
  • (D) Reduced load on condenser
💬 Discuss
✅ Correct Answer: (A) Erosion of turbine blades
📊 Heat Engines
Q. According to Boyle's law
  • (A) At constant pressure the temperature of a gas varies inversely as its volume
  • (B) At constant pressure the absolute temperature of a gas varies inversely as its volume
  • (C) At constant temperature, the pressure of a gas varies inversely as its volume
  • (D) At constant temperature, the absolute pressure of a gas varies inversely as its volume
💬 Discuss
✅ Correct Answer: (D) At constant temperature, the absolute pressure of a gas varies inversely as its volume

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