MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Thermodynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When a battery(12 V) is charged with 6 amp for 3 hours how much energy is delivered? |
| A. | 477.6 kJ |
| B. | 577.6 kJ |
| C. | 677.6 kJ |
| D. | 777.6 kJ |
| Answer» E. | |
| 2. |
A force of 1.2 kN moves a car with 60 km/h up a hill. Find the power? |
| A. | 20 kW |
| B. | 30 kW |
| C. | 40 kW |
| D. | 50 kW |
| Answer» B. 30 kW | |
| 3. |
A work of 2.5 kJ is delivered on a rod from a piston/cylinder where the air pressure is 500 kPa. What should be the diameter of cylinder to restrict the rod motion to maximum 0.5 m? |
| A. | 0.013 m |
| B. | 0.113 m |
| C. | 0.213 m |
| D. | 0.313 m |
| Answer» C. 0.213 m | |
| 4. |
A 1200 hp engine drives a car with a speed of 100 km/h. Find the force between the tires and the road? |
| A. | 11.8 kN |
| B. | 21.8 kN |
| C. | 31.8 kN |
| D. | 41.8 kN |
| Answer» D. 41.8 kN | |
| 5. |
A 1200 hp engine has a drive shaft rotating at 2000 RPM. Find the torque on the shaft? |
| A. | 2214 Nm |
| B. | 3214 Nm |
| C. | 4214 Nm |
| D. | 5214 Nm |
| Answer» D. 5214 Nm | |
| 6. |
The work is equal to the integral of the product of an intensive property. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 7. |
The work done per unit volume on a magnetic material is dW=-Hdl where H is |
| A. | field strength |
| B. | magnetization field |
| C. | induced current |
| D. | none of the mentioned |
| Answer» B. magnetization field | |
| 8. |
The surface tension acts to make the surface area of the liquid |
| A. | maximum |
| B. | minimum |
| C. | zero |
| D. | none of the mentioned |
| Answer» C. zero | |
| 9. |
Work done in stretching a wire is given by |
| A. | -∫FdL |
| B. | -∫EɛALdɛ |
| C. | -AEL∫ɛdɛ |
| D. | all of the mentioned |
| Answer» E. | |
| 10. |
The infinitesimal amount of work done on changing the length of a wire with tension T from L to L+dL is |
| A. | -FdL |
| B. | FdL |
| C. | -2FdL |
| D. | 2FdL |
| Answer» B. FdL | |
| 11. |
Flow work is analogous to |
| A. | shaft work |
| B. | electrical work |
| C. | stirring work |
| D. | displacement work |
| Answer» E. | |
| 12. |
Shaft work is given bya) T*ωb) T*dθc) T*τd) none of the mentioned 4.The flow work is significant only in |
| A. | T*ωb) T*dθc) T*τd) none of the mentioned 4.The flow work is significant only ina) flow process |
| B. | T*dθc) T*τd) none of the mentioned 4.The flow work is significant only ina) flow processb) open system |
| C. | T*τd) none of the mentioned 4.The flow work is significant only ina) flow processb) open systemc) flow process & open system |
| D. | none of the mentioned 4.The flow work is significant only ina) flow processb) open systemc) flow process & open systemd) none of the mentionedView Answer |
| Answer» B. T*dθc) T*τd) none of the mentioned 4.The flow work is significant only ina) flow processb) open system | |
| 13. |
Shaft uses which kind of motion to do work? |
| A. | vertical motion |
| B. | horizontal motion |
| C. | rotational motion |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 14. |
The current flow, I, in amperes, is given by I=(dC)/(dτ) |
| A. | dC is the charge crossing a boundary |
| B. | time taken is dτ |
| C. | c is the charge in coulombs and t is time in seconds |
| D. | all of the mentioned |
| Answer» E. | |