Discussion
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- Question
A machine which is not capable of doing any work in the reversed direction, after the effort is removed, is called a reversible machine.
Options- A. True
- B. False
- Correct Answer
- False
- 1. The Parsons' reaction turbine has
Options- A. only moving blades
- B. only fixed blades
- C. identical fixed and moving blades
- D. fixed and moving blades of different shape Discuss
- 2. Galvanising is a
Options- A. zinc diffusion process
- B. process of coating zinc by hot dipping
- C. process used for making thin phosphate coating on steel
- D. none of the above Discuss
- 3. Supercharging __________ the power developed by the engine.
Options- A. has no effect on
- B. increases
- C. decreases Discuss
- 4. The exhaust gas from petrol engine contains
Options- A. petrol vapours
- B. water vapours
- C. carbon monoxide
- D. all of these Discuss
- 5. The stiffness is the ability of a material to resist
Options- A. deformation under stress
- B. fracture due to high impact loads
- C. externally applied forces with breakdown or yielding
- D. none of the above Discuss
- 6. A nozzle is said to be a divergent nozzle
Options- A. when the cross-section of the nozzle increases continuously from entrance to exit
- B. when the cross-section of the nozzle decreases continuously from entrance to exit
- C. when the cross-section of the nozzle first decreases from entrance to throat and then increases from its throat to exit
- D. none of the above Discuss
- 7. When the gas is heated at constant volume, the heat supplied increases the internal energy of the gas.
Options- A. True
- B. False Discuss
- 8. The amount of heat generated per kg of fuel is known as
Options- A. calorific value
- B. heat energy
- C. lower calorific value
- D. higher calorific value Discuss
- 9. Which of the following statement is correct for steam turbines as compared to reciprocating steam engines?
Options- A. A steam turbine develops higher speeds
- B. The efficiency of steam turbine is higher
- C. The steam consumption is less
- D. all of these Discuss
- 10. The specific weight of water in S.I. units is taken as
Options- A. 9.81 kN/m3
- B. 9.81 x 103 kN/m3
- C. 9.81 x 10-6 N/mm3
- D. any one of these Discuss
More questions
Correct Answer: identical fixed and moving blades
Correct Answer: process of coating zinc by hot dipping
Correct Answer: increases
Correct Answer: all of these
Correct Answer: deformation under stress
Correct Answer: when the cross-section of the nozzle increases continuously from entrance to exit
Correct Answer: True
Correct Answer: calorific value
Correct Answer: all of these
Correct Answer: 9.81 kN/m3
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