MCQOPTIONS
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MCQOPTIONS
This section includes 55 Mcqs, each offering curated multiple-choice questions to sharpen your Electronic Devices Circuits knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A system undergoing change in state from A to B along path ‘X’ receives 100 J heat and does 40 J work. It returns to state A from B along path ‘Y’ with work input of 30 J. Calculate the heat transfer involved along the path ‘Y’. |
| A. | – 60 J |
| B. | 60 J |
| C. | – 90 J |
| D. | 90 J |
| Answer» D. 90 J | |
| 2. |
A sealed rigid vessel has volume of 1 m3 and contains 2 kg of water at 100°C. The vessel is now heated. If a safety pressure valve is installed, at what pressure should the valve be set to have a maximum temperature of 200°C ? |
| A. | 431.3 kPa |
| B. | 531.3 kPa |
| C. | 631.3 kPa |
| D. | 731.3 kPa |
| Answer» B. 531.3 kPa | |
| 3. |
Calculate the change in enthalpy of carbon dioxide from 30 to 1500°C at 100 kPa at constant specific heat. |
| A. | 2237.7 kJ/kg |
| B. | 1637.7 kJ/kg |
| C. | 1237.7 kJ/kg |
| D. | 2337.7 kJ/kg |
| Answer» D. 2337.7 kJ/kg | |
| 4. |
A piston-cylinder device initially contains air at 150 kPa and 27°C. At this state, the volume is 400 litre. The mass of the piston is such that a 350 kPa pressure is required to move it. The air is now heated until its volume has doubled. Determine work done by the air. |
| A. | 120 kJ |
| B. | 130 kJ |
| C. | 100 kJ |
| D. | 140 kJ |
| Answer» E. | |
| 5. |
A piston-cylinder device initially contains air at 150 kPa and 27°C. At this state, the volume is 400 litre. The mass of the piston is such that a 350 kPa pressure is required to move it. The air is now heated until its volume has doubled. Determine the final temperature. |
| A. | 1400 K |
| B. | 400 K |
| C. | 500 K |
| D. | 1500 K |
| Answer» B. 400 K | |
| 6. |
The pressure gauge on an air tank shows 60 kPa when the diver is 8 m down in the ocean. At what depth will the gauge pressure be zero? |
| A. | 34.118 m |
| B. | 24.118 m |
| C. | 14.118 m |
| D. | none of the mentioned |
| Answer» C. 14.118 m | |
| 7. |
Find the pressure of water at 200°C and having specific volume of 1.5 m3/kg. |
| A. | 0.9578 m3/kg |
| B. | 0.8578 m3/kg |
| C. | 0.7578 m3/kg |
| D. | 0.6578 m3/kg |
| Answer» B. 0.8578 m3/kg | |
| 8. |
A 5 m long vertical tube having cross sectional area 200 cm2 is placed in a water. It is filled with 15°C water, with the bottom closed and the top open to 100 kPa atmosphere. What is the pressure at the bottom of tube? |
| A. | 119 kPa |
| B. | 129 kPa |
| C. | 139 kPa |
| D. | 149 kPa |
| Answer» E. | |
| 9. |
A 5 m long vertical tube having cross sectional area 200 cm^2 is placed in a water. It is filled with 15°C water, with the bottom closed and the top open to 100 kPa atmosphere. How much water is present in tube? |
| A. | 99.9 kg |
| B. | 109.9 kg |
| C. | 89.9 kg |
| D. | 79.9 kg |
| Answer» B. 109.9 kg | |
| 10. |
A piston/cylinder with a cross-sectional area of 0.01 m^2 is resting on the stops. With an outside pressure of 100 kPa, what should be the water pressure to lift the piston? |
| A. | 178kPa |
| B. | 188kPa |
| C. | 198kPa |
| D. | 208kPa |
| Answer» D. 208kPa | |
| 11. |
One kg of diatomic Oxygen is present in a 500 L tank. Find the specific volume on both mass and mole basis. |
| A. | 0.6 m3/kg , 0.260 m3/mole |
| B. | 0.5 m3/kg , 0.0160 m3/mole |
| C. | 0.56 m3/kg , 0.0215 m3/mole |
| D. | 0.7 m3/kg , 0.0325 m3/mole |
| Answer» C. 0.56 m3/kg , 0.0215 m3/mole | |
| 12. |
A capacitor is charged by a constant current of 2 mA and results in a voltage increase of 12 V in a 10 sec interval. The value of capacitance is ________ |
| A. | 0.75 mF |
| B. | 1.33 mF |
| C. | 0.6 mF |
| D. | 1.67 mF |
| Answer» E. | |
| 13. |
The energy required to charge a 10 µF capacitor to 100 V is ________ |
| A. | 0.1 J |
| B. | 0.05 J |
| C. | 5 x 10(-9) J |
| D. | 10 x 10(-9) J |
| Answer» C. 5 x 10(-9) J | |
| 14. |
In the circuit the dependent source __________ |
| A. | supplies 16 W |
| B. | absorbs 16 W |
| C. | supplies 32 W |
| D. | absorbs 32 W |
| Answer» E. | |
| 15. |
What will be the value of Req in the following Circuit? |
| A. | 11.86 ohm |
| B. | 10 ohm |
| C. | 25 ohm |
| D. | 11.18 ohm |
| Answer» E. | |
| 16. |
Consider the circuit graph shown in figure below. Each branch of circuit graph represent a circuit element. The value of voltage V1 is: |
| A. | 30 V |
| B. | 25 V |
| C. | 20 V |
| D. | 15 V |
| Answer» E. | |
| 17. |
Concrete is weak in? |
| A. | Compression |
| B. | Tension |
| C. | Loading |
| D. | Bending |
| Answer» C. Loading | |
| 18. |
Development of early cracks in reinforced concrete is due to ___________ |
| A. | Strains of steel |
| B. | Stresses of steel |
| C. | Ultimate load |
| D. | Bending of steel |
| Answer» B. Stresses of steel | |
| 19. |
In reinforced concrete members, the prestress commonly introduced is ___________ |
| A. | Tensioning steel reinforcement |
| B. | Tensioning wood reinforcement |
| C. | Tensioning rings |
| D. | Tensioning plates |
| Answer» B. Tensioning wood reinforcement | |
| 20. |
The attempt to introduce permanently acting forces in concrete to resist the elastic forces is ___________ |
| A. | Prestressing |
| B. | Loading |
| C. | Pre-straining |
| D. | Bending |
| Answer» B. Loading | |
| 21. |
The earliest examples of wooden barrel construction by force-fitting of metal bands and shrink-fitting of metal tiers of wooden wheels indicate the art of ___________ |
| A. | Prestressing |
| B. | Tensioning |
| C. | Stress |
| D. | Straining |
| Answer» B. Tensioning | |
| 22. |
The prestressing of concrete member is carried out to reduce ___________ |
| A. | Compressive stresses |
| B. | Tensile stresses |
| C. | Bending stresses |
| D. | Shear force |
| Answer» B. Tensile stresses | |
| 23. |
In reinforced concrete members the prestress is commonly introduced by ___________ |
| A. | Tensioning the steel reinforcement |
| B. | Tendons |
| C. | Shortening of concrete |
| D. | Rings |
| Answer» B. Tendons | |
| 24. |
The phenomena of development of internal tensile stresses in a concrete member by means of tensioning devices are called as ____________ |
| A. | Pre-tensioning |
| B. | Post-tensioning |
| C. | Prestressing of concrete |
| D. | Thermoelectric prestressing |
| Answer» D. Thermoelectric prestressing | |
| 25. |
THE_PRESSURE_GAUGE_ON_AN_AIR_TANK_SHOWS_60_KPA_WHEN_THE_DIVER_IS_8_M_DOWN_IN_THE_OCEAN._AT_WHAT_DEPTH_WILL_THE_GAUGE_PRESSURE_BE_ZERO??$ |
| A. | 34.118 m |
| B. | 24.118 m |
| C. | 14.118 m |
| D. | none of the mentioned |
| Answer» C. 14.118 m | |
| 26. |
A_CAPACITOR_IS_CHARGED_BY_A_CONSTANT_CURRENT_OF_2_MA_AND_RESULTS_IN_A_VOLTAGE_INCREASE_OF_12_V_IN_A_10_SEC_INTERVAL._THE_VALUE_OF_CAPACITANCE_IS_________?$ |
| A. | 0.75 mF |
| B. | 1.33 mF |
| C. | 0.6 mF |
| D. | 1.67 mF |
| Answer» E. | |
| 27. |
DEVELOPMENT_OF_EARLY_CRACKS_IN_REINFORCED_CONCRETE_IS_DUE_TO:?$ |
| A. | Strains of steel |
| B. | Stresses of steel |
| C. | Ultimate load |
| D. | Bending of steel |
| Answer» B. Stresses of steel | |
| 28. |
A piston-cylinder device initially contains air at 150 kPa and 27°C. At this state, the volume is 400 litre. The mass of the piston is such that a 350 kPa pressure is required to move it. The air is now heated until its volume has doubled. Determine work done by the air.$# |
| A. | 120 kJ |
| B. | 130 kJ |
| C. | 100 kJ |
| D. | 140 kJ |
| Answer» E. | |
| 29. |
A piston-cylinder device initially contains air at 150 kPa and 27°C. At this state, the volume is 400 litre. The mass of the piston is such that a 350 kPa pressure is required to move it. The air is now heated until its volume has doubled. Determine the final temperature.$# |
| A. | 1400 K |
| B. | 400 K |
| C. | 500 K |
| D. | 1500 K |
| Answer» B. 400 K | |
| 30. |
Concrete_is_weak_in?$ |
| A. | Compression |
| B. | Tension |
| C. | Loading |
| D. | Bending |
| Answer» C. Loading | |
| 31. |
A system undergoing change in state from A to B along path ‘X’ receives 100 J heat and does 40 J work. It returns to state A from B along path ‘Y’ with work input of 30 J. Calculate the heat transfer involved along the path ‘Y’.$ |
| A. | – 60 J |
| B. | 60 J |
| C. | – 90 J |
| D. | 90 J |
| Answer» D. 90 J | |
| 32. |
A sealed rigid vessel has volume of 1 m3 and contains 2 kg of water at 100°C. The vessel is now heated. If a safety pressure valve is installed, at what pressure should the valve be set to have a maximum temperature of 200°C ?$ |
| A. | 431.3 kPa |
| B. | 531.3 kPa |
| C. | 631.3 kPa |
| D. | 731.3 kPa |
| Answer» B. 531.3 kPa | |
| 33. |
Calculate the change in enthalpy of carbon dioxide from 30 to 1500°C at 100 kPa at constant specific heat.$ |
| A. | 2237.7 kJ/kg |
| B. | 1637.7 kJ/kg |
| C. | 1237.7 kJ/kg |
| D. | 2337.7 kJ/kg |
| Answer» D. 2337.7 kJ/kg | |
| 34. |
Find the change in u for carbon dioxide between 600 K and 1200 K for a constant Cv0 value. |
| A. | 291.8 kJ/kg |
| B. | 391.8 kJ/kg |
| C. | 491.8 kJ/kg |
| D. | 591.8 kJ/kg |
| Answer» C. 491.8 kJ/kg | |
| 35. |
A 100 m tall building receives superheated steam at 200 kPa at ground and leaves saturated vapour from the top at 125 kPa by losing 110 kJ/kg of heat. What should be the minimum inlet temperature at the ground of the building so that no steam will condense inside the pipe at steady state? |
| A. | 363.54°C |
| B. | 263.54°C |
| C. | 163.54°C |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 36. |
The energy required to charge a 10 µF capacitor to 100 V is _______?# |
| A. | 0.1 J |
| B. | 0.05 J |
| C. | 5 x 10<sup>(-9)</sup> J |
| D. | 10 x 10<sup>(-9)</sup> J |
| Answer» C. 5 x 10<sup>(-9)</sup> J | |
| 37. |
In reinforced concrete members, the prestress commonly introduced is? |
| A. | Tensioning steel reinforcement |
| B. | Tensioning wood reinforcement |
| C. | Tensioning rings |
| D. | Tensioning plates |
| Answer» B. Tensioning wood reinforcement | |
| 38. |
Find the pressure of water at 200°C and having specific volume of 1.5 m^3/kg.# |
| A. | 141.6 kPa |
| B. | 111.6 kPa |
| C. | 121.6 kPa |
| D. | 161.6 kPa |
| Answer» E. | |
| 39. |
A 5m^3 container is filled with 840 kg of granite (density is 2400 kg/m^3) and the rest of the volume is air (density is 1.15 kg/m^3). Find the mass of air present in the container. |
| A. | 9.3475 kg |
| B. | 8.3475 kg |
| C. | 6.3475 kg |
| D. | 5.3475 kg |
| Answer» E. | |
| 40. |
Twelve 6 ohm resistors are used to form an edge of a cube. The resistance between two diagonally opposite corner of the cube (in ohm) is ________ |
| A. | 5/6 |
| B. | 6/5 |
| C. | 5 |
| D. | 6 |
| Answer» D. 6 | |
| 41. |
The attempt to introduce permanently acting forces in concrete to resist the elastic forces is: |
| A. | Prestressing |
| B. | Loading |
| C. | Pre-straining |
| D. | Bending |
| Answer» B. Loading | |
| 42. |
The concept which is used in many branches of civil engineering and building construction? |
| A. | Reinforced concrete |
| B. | Prestressed concrete |
| C. | Steel concrete |
| D. | Lump sum concrete |
| Answer» C. Steel concrete | |
| 43. |
Find the pressure of water at 200°C and having specific volume of 1.5 m3/kg.$ |
| A. | 0.9578 m<sup>3</sup>/kg |
| B. | 0.8578 m<sup>3</sup>/kg |
| C. | 0.7578 m<sup>3</sup>/kg |
| D. | 0.6578 m<sup>3</sup>/kg |
| Answer» B. 0.8578 m<sup>3</sup>/kg | |
| 44. |
The earliest examples of wooden barrel construction by force-fitting of metal bands and shrink-fitting of metal tiers of wooden wheels indicate the art of: |
| A. | Prestressing |
| B. | Tensioning |
| C. | Stress |
| D. | Straining |
| Answer» B. Tensioning | |
| 45. |
A 5 m long vertical tube having cross sectional area 200 cm2 is placed in a water. It is filled with 15°C water, with the bottom closed and the top open to 100 kPa atmosphere. What is the pressure at the bottom of tube ?$ |
| A. | 119 kPa |
| B. | 129 kPa |
| C. | 139 kPa |
| D. | 149 kPa |
| Answer» E. | |
| 46. |
The prestressing of concrete member is carried out to reduce: |
| A. | Compressive stresses |
| B. | Tensile stresses |
| C. | Bending stresses |
| D. | Shear force |
| Answer» B. Tensile stresses | |
| 47. |
A 5 m long vertical tube having cross sectional area 200 cm^2 is placed in a water. It is filled with 15°C water, with the bottom closed and the top open to 100 kPa atmosphere. How much water is present in tube?$ |
| A. | 99.9 kg |
| B. | 109.9 kg |
| C. | 89.9 kg |
| D. | 79.9 kg |
| Answer» B. 109.9 kg | |
| 48. |
The energy required to move 120 coulomb through 3 V is _________ |
| A. | 25 mJ |
| B. | 360 J |
| C. | 40 J |
| D. | 2.78 mJ |
| Answer» C. 40 J | |
| 49. |
Which of the following basic concept is involved in the analysis of prestressed concrete members? |
| A. | Combined and bending stresses |
| B. | Principle stresses |
| C. | Shear stresses |
| D. | Overhead stresses |
| Answer» B. Principle stresses | |
| 50. |
A large exhaust fan in a lab room keeps the pressure inside at 10 cm water relative vacuum to the hallway? What is the net force acting on the door measuring 1.9 m by 1.1 m? |
| A. | 2020 N |
| B. | 2030 N |
| C. | 2040 N |
| D. | 2050 N |
| Answer» E. | |