MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Farm Machinery knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If L is the stroke and N is the rpm, mean piston speed of two stroke engine is _______ |
| A. | LN |
| B. | LN/2 |
| C. | 2LN |
| D. | 2LN/3 |
| Answer» D. 2LN/3 | |
| 2. |
The mechanical efficiency of a single cylinder four-stroke engine is 80%. The frictional power is estimated to be 25. Calculate the indicated and brake power developed by the engine. |
| A. | 106 kW;120 kW |
| B. | 125 kW;100 kW |
| C. | 120 kW;106 kW |
| D. | 100 kW;125 kW |
| Answer» C. 120 kW;106 kW | |
| 3. |
Who invented two-stroke engine in 1878? |
| A. | Dugald Clark |
| B. | Nikola Tesla |
| C. | Carl Sagan |
| D. | William Henry Bragg |
| Answer» B. Nikola Tesla | |
| 4. |
The pipe which connects the intake system to the inlet valve of the engine and through which air or air-fuel mixture is drawn into the cylinder is known as _______ |
| A. | Spark Plug |
| B. | Connecting Rod |
| C. | Camshaft |
| D. | Inlet Manifold |
| Answer» E. | |
| 5. |
Find the weight of air for complete combustion of 10 litres of petrol assuming air contains 22.7% oxygen. |
| A. | 106.10 kg |
| B. | 120kg |
| C. | 113.67 kg |
| D. | 115.79 kg |
| Answer» D. 115.79 kg | |
| 6. |
In which of the following condition the engine is known as over-square engine? |
| A. | d < L |
| B. | d > L |
| C. | d=0 |
| D. | L=0 |
| Answer» C. d=0 | |
| 7. |
A four-stroke diesel engine operating at 1200 rpm uses 0.1 kg of fuel in 5 minutes and has the brake specific fuel consumption equals to 0.1910 kg BHP h. Calculate the torque developed. |
| A. | 6.5 kg-m |
| B. | 8 kg-m |
| C. | 7.5 kg-m |
| D. | 5 kg-m |
| Answer» D. 5 kg-m | |
| 8. |
Which of the following is an indicator of the combustion speed of diesel fuel and compression needed for ignition? |
| A. | Cetane Number |
| B. | Octane Number |
| C. | Calorific Value |
| D. | Pre-Ignition |
| Answer» B. Octane Number | |
| 9. |
Which is largest piston driven aircraft having 36 cylinders? |
| A. | DKW |
| B. | Lycoming R-7755 |
| C. | Saab 92 |
| D. | Pratt and Whitney R-4360 |
| Answer» C. Saab 92 | |
| 10. |
Rapid explosion of air-fuel mixture within the cylinder, when ignited by a spark is known as _______ |
| A. | constant heat combustion |
| B. | constant pressure combustion |
| C. | constant volume combustion |
| D. | cut off ratio |
| Answer» D. cut off ratio | |