MCQOPTIONS
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MCQOPTIONS
This section includes 69 Mcqs, each offering curated multiple-choice questions to sharpen your Food Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Statement 1: In nusselt’s film theory, velocity of the falling film is not affected by the velocity of the vapors.Statement 2: LMTD can be used provided the overall heat transfer co-efficient is constant over a large range of temperatures. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 52. |
Find heat transfer in an agitated jacketed vessel if Nᵣₑᵢ is 1.5 * 105 and Nₚᵣ is 20. |
| A. | 0.9 |
| B. | 1.2 |
| C. | 1.8 |
| D. | None of the mentioned |
| Answer» B. 1.2 | |
| 53. |
Statement 1: Nₚᵣ= (Cₚm)/klStatement 2: Stanton number is a product of Nᵣₑ and Nₚᵣ. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» D. False, True | |
| 54. |
Statement 1: G is known as the mass flux and it is the product of density and velocity.Statement 2: Grashof number is associated with forced convection. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» B. True, True | |
| 55. |
Which of the following is NOT a real dimensionless number? |
| A. | Pectit number |
| B. | Stanton number |
| C. | Graetz number |
| D. | Grashof number |
| Answer» B. Stanton number | |
| 56. |
Statement 1: The factor Fₒ shows the microbial safety in the food item at the coldest point.Statement 2: Fₒ takes the time-temperature data at that particular point and compares conventional heating to microwave heating. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 57. |
Statement 1: α=k/(ρCₚ)Statement 2: α stands for thermal conductivity. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» B. True, True | |
| 58. |
Фᵥ is generally taken as 1 in food processing as generally very high wall temperatures aren’t reached and hence (µ/µw) * 0.14 is 1 as there isn’t much difference in µ and µw. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 59. |
Statement 1: NFo stands for Fourier number.Statement 2: NFo= (αtₜ)/s² |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 60. |
The reciprocal of heat transfer co-efficient is _____ |
| A. | Conductance |
| B. | Resistance |
| C. | Density |
| D. | Temperature difference |
| Answer» C. Density | |
| 61. |
Which of the following reason does NOT affect radiation between two parallel bodies? |
| A. | Angle of vision |
| B. | Orientation of surfaces |
| C. | Emissivity of both |
| D. | Smoothness and roughness |
| Answer» B. Orientation of surfaces | |
| 62. |
Statement 1: The heat transfer co-efficient in ice is four times that of water.Statement 2: k in conductance is for thermal conductivity. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 63. |
Which of the following is true about Plate heat exchangers? |
| A. | They’re used for Ultra high temperature treatment |
| B. | Used for high temperature and short time |
| C. | They’re used for Ultra high temperature treatment and also Used for high temperature and short time |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 64. |
Statement 1: Plate heat exchangers are used in heat sensitive foods like milk.Statement 2: Principle behind plate heat exchangers is that there is very less space between the plates and hence quick heating can take place. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 65. |
The equationdq/dA= (k(-dT))/dx is called _____ |
| A. | Kirchhoff’s law of conduction |
| B. | Fourier’s law conduction |
| C. | Kirchhoff’s & Fourier’s law conduction |
| D. | None of the mentioned |
| Answer» C. Kirchhoff’s & Fourier’s law conduction | |
| 66. |
X-axis is temperature and Y-axis is pressure.Which of the following curves is followed for freeze drying of prawns? |
| A. | AA’ |
| B. | BB’ |
| C. | ABO |
| D. | A’OB’ |
| Answer» C. ABO | |
| 67. |
The x- axis is the moisture content on dry basis. The y-axis is the equilibrium moisture content.Which of the following shows Bound moisture content? |
| A. | AIEG |
| B. | GIBF |
| C. | GFHC |
| D. | EGHD |
| Answer» B. GIBF | |
| 68. |
In the below figure, ‘a’ refers to ______ and ‘b’ refers to _____. |
| A. | Steady state heat transfer, Unsteady state heat transfer |
| B. | Unsteady state heat transfer, Steady state heat transfer |
| C. | None of the mentioned |
| D. | All of the mentioned |
| Answer» B. Unsteady state heat transfer, Steady state heat transfer | |
| 69. |
Y axis is the density function for volume fraction. X axis is Fₒ.Curve a represents the microwave heating curve and curve b represents the conventional heating pattern. Which of the following statements are true for the below graph? |
| A. | Microwave heating shows a smaller spread hence more uniform heating |
| B. | Heat transfer in microwave heating is faster than in conventional heating |
| C. | Heat transfer in microwave heating is safer than in conventional heating |
| D. | All of the mentioned |
| Answer» E. | |