Mechanical Department (Indian Railways) Test - Set 7

🚆 Mechanical Department (Indian Railways) Test - Set 7

1. What is the primary function of a flywheel in an internal combustion engine?

Increase torque Reduce emissions Maintain rotational inertia Pump fuel

2. Which process is used to harden the surface of steel components?

Annealing Normalizing Carburizing Tempering

3. The efficiency of a diesel engine is generally in the range of:

20–25% 30–35% 35–45% 50–60%

4. What is the main advantage of using hydraulic brakes in locomotives?

Lower maintenance cost More braking power Uniform braking force Less weight

5. What component measures the speed of a rotating shaft in locomotives?

Tacho-generator Speedometer Odometer Encoder

6. What is cavitation in pumps?

Overheating of pump Sudden drop in pressure causing vapor bubbles Leakage of oil Corrosion due to chemicals

7. What is the function of a governor in an engine?

Start the engine Maintain engine temperature Regulate engine speed Supply fuel to cylinders

8. Which of the following is used for measuring pressure in boilers?

Thermometer Manometer Barometer Hygrometer

9. Which thermodynamic cycle is used in diesel engines?

Otto cycle Diesel cycle Carnot cycle Rankine cycle

10. The term "BHP" in engines stands for:

Basic Horse Power Brake Horse Power Boosted Horse Power Base Horse Power