MCQOPTIONS
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MCQOPTIONS
This section includes 4 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A 2-stroke oil engine has bore of 20 cm, stroke 30 cm, speed 350 r.p.m, i.m.e.p. 275 kN/m2, net brake load 610 N, diameter of brake drum 1 m, oil consumption 4.25 kg/hr, calorific value of fuel 44 × 103 kJ/kg. The indicated thermal efficiency will be |
| A. | 29.1% |
| B. | 31.3% |
| C. | 33.5% |
| D. | 35.7% |
| Answer» B. 31.3% | |
| 2. |
In an IC engine, combustion was found to proceed during the expansion stroke also. The reason could be: |
| A. | rich mixture with ignition advance |
| B. | high calorific value of the fuel |
| C. | weak mixture with ignition advance |
| D. | weak mixture without ignition advance |
| Answer» E. | |
| 3. |
In steam power cycle, the process of removing non-condensable gases is called |
| A. | scavenging process |
| B. | deaeration process |
| C. | exhaust process |
| D. | condensation process |
| Answer» C. exhaust process | |
| 4. |
In CI engines the ignition delay period is counted from the start of injection to the: |
| A. | start of after burning |
| B. | start of controlled combustion |
| C. | end of combustion |
| D. | point where the pressure-time curve separates from the motoring curve |
| Answer» E. | |