Engineering properties of agriculture produce - Agricultural Process Engineering - Agricultural Engineering Previous Year Questions

1

2007 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2007

An ellipsoidal object has three axes measuring 40 cm, 20 cm and 20 cm respectively. The volume of the object is

A

4.23 litres

B

8.38 litres

C

12.63 litres

D

17.05 litres

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2

2007 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2007

At 65 °C, Henderson constants C and n are 7.4 × 10⁻⁵ K⁻¹ and 0.56 respectively. The equilibrium moisture content corresponding to 40% relative humidity is

A

38% (wet basis)

B

78% (dry basis)

C

87% (wet basis)

D

358% (dry basis)

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3

2008 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2008

Water activity (a_w) is a ratio of

A

vapour pressure of water to partial pressure of water in the product

B

partial pressure of water in air to partial pressure of air at saturation

C

vapour pressure of water in equilibrium with the food to vapour pressure of pure water at the same temperature

D

vapour pressure of pure water to vapour pressure of water in equilibrium with food

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4

2008 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2008

For foods whose composition is known, the following equation holds good
\(C_p = 1.424 m_c + 1.594 m_p + 1.675 m_f + 0.837 m_a + 4.187 m_m\)
where, \(C_p\) is specific heat in kJ kg⁻¹ K⁻¹, and \(m_c, m_p, m_f, m_a\) & \(m_m\) are mass fractions of carbohydrates, proteins, fats, ash & moisture, respectively.
The specific heat of a food containing 40% carbohydrates, 20% protein, 10% fat, 5% ash and 25% moisture will be

A

1.42

B

2.14

C

4.21

D

6.41

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5

2008 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2008

One hundred kilogram of a food grain is dried from 18% wb to 13% wb moisture content. The total amount of water removed from the grain is

A

6.82 kg

B

6.28 kg

C

5.75 kg

D

5.57 kg

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6

2008 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2008

The results of sieve analysis of a food powder are presented in the following two tables.

Sieve aperture (μm)	Mass retained (%)
12.5	13.8
7.5	33.6
4.0	35.2
2.5	12.8
0.75	4.6

Average diameter of particles, d (μm)	Mass retained on the sieve, x (%)	(d) (x) = dx
0.375	4.6	1.725
1.625	12.8	20.800
3.250	35.2	114.4
5.750	33.6	193.2
10.000	13.8	138.0
Total	100	468.125

The mass mean diameter of the sample will be

A

8.46 μm

B

6.48 μm

C

4.86 μm

D

4.68 μm

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7

2008 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2008

The temperature at the sublimation front will be

A

-73.5 °C

B

-35.7 °C

C

-25.28 °C

D

-15.72 °C

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8

2009 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2009

If the length, breadth and thickness of a rice grain are 7 mm, 3 mm and 2 mm respectively, the sphericity of the grain is

A

0.33

B

0.50

C

0.67

D

0.75

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9

2009 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2009

Wheat weighing 4900 N at moisture content of 25% on wet basis is to be dried to moisture content of 10% on dry basis. The amount of moisture evaporated from the wheat in kg is

A

87

B

103

C

116

D

156

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10

2009 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2009

If bulk density of a particulate material is 600 kg m⁻³ and true density is 1000 kg m⁻³, the porosity of the material is

A

20%

B

40%

C

60%

D

80%

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11

2009 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2009

An insulating material has a thermal conductivity of 0.03 W m⁻¹ K⁻¹. If 60 mm of this material is applied as insulation on a heat transfer surface, the R-value of the insulation in m² K W⁻¹ is

A

1

B

2

C

3

D

6

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12

2009 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2009

Bulk density of paddy with 28% moisture content on wet basis is 650 kg m^-3. The dry solid bulk density of paddy in kg m^-3 is

A

468

B

508

C

832

D

904

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13

2009 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2009

If absolute humidity at saturation and percentage humidity of air are 0.075 kg water vapour (kg dry air)^-1 and 60% respectively, the relative humidity of air is

A

57.4%

B

60.0%

C

62.7%

D

74.5%

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14

2009 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2009

Vegetable seeds are stored at absolute temperature of 320 K and relative humidity of 20%. If Henderson equation for equilibrium relationship is valid for this case where the values of constants C and n are 6.5 × 10^-6 and 1.8 respectively, the equilibrium moisture content of the seeds will be

A

5.6%

B

10.2%

C

13.4%

D

20.5%

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15

2010 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2010

Air at 40°C temperature has partial vapour pressure of 2.4 kPa. If universal gas constant is 8.314 kJ kg mole^-1 K^-1 and total pressure is 101.325 kPa then humid volume of air in m³ (kg dry air)^-1 is

A

0.809

B

0.908

C

1.089

D

1.098

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16

2010 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2010

20% sucrose solution is boiled and frozen separately. If latent heat of vaporization at 100°C and the latent heat of crystallization at 0°C are 2257 and 334 kJ kg^-1, respectively, then the ratio of freezing point depression to boiling point elevation is

A

6.3

B

4.2

C

3.6

D

2.4

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17

2010 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2010

Modern warfare has changed from large scale clashes of armies to suppression of civilian populations. Chemical agents that do their work silently appear to be suited to such warfare; and regretfully, there exist people in military establishments who think that chemical agents are useful tools for their cause.

Which of the following statements best sums up the meaning of the above passage:

A

Modern warfare has resulted in civil strife.

B

Chemical agents are useful in modern warfare.

C

Use of chemical agents in warfare would be undesirable.

D

People in military establishments like to use chemical agents in war.

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18

2011 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2011

The sieve analysis of a finely ground rice powder is represented by a straight line from zero percent mass at 1 μm particle size to 100 percent mass at 101 μm particle size. The volume-surface mean diameter in μm is

A

14.6

B

19.2

C

21.7

D

25.3

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19

2011 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2011

Sphericity of a particle is defined as: (surface to volume ratio for a sphere having identical volume as that of the particle) / (the surface to volume ratio of the particle). The measure of sphericity of a cube shaped sugar crystal is

A

\(\left(\frac{\pi}{6}\right)^{1/3}\)

B

\(\left(\frac{\pi}{6}\right)^{2/3}\)

C

\(\left(\frac{\pi}{4}\right)^{1/3}\)

D

\(\left(\frac{\pi}{4}\right)^{2/3}\)

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20

2011 · Agricultural Engineering · Agricultural Process Engineering · Engineering properties of agriculture produce

Agricultural Engineering (AG) 2011

The question below consists of a pair of related words followed by four pairs of words. Select the pair that best expresses the relation in the original pair:
Gladiator : Arena

A

dancer : stage

B

commuter : train

C

teacher : classroom

D

lawyer : courtroom

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