Tractors and Power tillers - Farm Power - Agricultural Engineering Previous Year Questions

1

2007 · Agricultural Engineering · Farm Power · Tractors and Power tillers

Agricultural Engineering (AG) 2007

A lubricating oil with high viscosity index is desirable for tractor engine due to

A

More variation of viscosity with temperature

B

Less variation of viscosity with temperature

C

High pour point

D

High cloud point

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2

2007 · Agricultural Engineering · Farm Power · Tractors and Power tillers

Agricultural Engineering (AG) 2007

In a tractor cab, the temperature comfort zone for the tractor operator is between

A

287 and 290 K

B

288 and 293 K

C

291 and 297 K

D

295 and 301 K

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3

2007 · Agricultural Engineering · Farm Power · Tractors and Power tillers

Agricultural Engineering (AG) 2007

As per ASABE standards, the three-point hitch of a two-wheel drive tractor with a maximum drawbar power of 45 kW comes under the category

A

I

B

II

C

III

D

IV

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4

2007 · Agricultural Engineering · Farm Power · Tractors and Power tillers

Agricultural Engineering (AG) 2007

A tractor engine developing 30 kW rejects heat at the rate of 0.58 kW per kW of engine output. A water cooling system is to be installed in the tractor. The expected temperature rise as air moves through the radiator is 20 K. The frontal area of the radiator is limited to 0.16 m\(^2\). If density of air is 1.29 kg m\(^{-3}\) and specific heat of air is 1.0 kJ kg\(^{-1}\) K\(^{-1}\), the amount of air to be blown per unit time through the radiator frontal area is

A

0.674 m\(^3\)s\(^{-1}\)

B

0.870 m\(^3\)s\(^{-1}\)

C

1.162 m\(^3\)s\(^{-1}\)

D

1.502 m\(^3\)s\(^{-1}\)

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5

2008 · Agricultural Engineering · Farm Power · Tractors and Power tillers

Agricultural Engineering (AG) 2008

The nature of variation of tractive efficiency (TE) with wheel slip (S) in a rear wheel driven tractor is

A

B

C

D

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6

2009 · Agricultural Engineering · Farm Power · Tractors and Power tillers

Agricultural Engineering (AG) 2009

As per BIS standard, the power tests for tractor PTO includes

A

Maximum power, varying load and varying speed tests

B

Varying speed and maximum power tests

C

Varying load and varying speed tests

D

Varying load and maximum power tests

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7

2010 · Agricultural Engineering · Farm Power · Tractors and Power tillers

Agricultural Engineering (AG) 2010

A two-wheel drive tractor has a PTO speed of 540 rpm and it produces 35 kW net engine power. Corresponding torque available at PTO in N m will be

A

435 – 457

B

465 – 485

C

495 – 505

D

535 – 558

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8

2013 · Agricultural Engineering · Farm Power · Tractors and Power tillers

Agricultural Engineering (AG) 2013

During a test, sound level was measured as 90 dB in the operator's cabin on a tractor. Taking reference sound pressure as \(2 \times 10^{-5} \text{ N m}^{-2}\), the measured RMS sound pressure in \(\text{N m}^{-2}\) is

A

6.32

B

\(6.32 \times 10^{-1}\)

C

\(1.8 \times 10^{-3}\)

D

\(6.32 \times 10^{-10}\)

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9

2013 · Agricultural Engineering · Farm Power · Tractors and Power tillers

Agricultural Engineering (AG) 2013

A two-wheel drive tractor pulls an implement that has a draft force of \(11.5 \text{ kN}\). The total motion resistance of the tractor is \(2.5 \text{ kN}\). Under these circumstances, the slip of the drive wheels is 20%. If the power loss in transmission is 20%, the percentage of power lost in converting engine power into drawbar power is ________

Check answer

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10

2026 · Agricultural Engineering · Farm Power · Tractors and Power tillers

Agricultural Engineering (AG) 2026

A tractor engine delivers 382 N.m brake torque at a rated speed of 2000 rpm. The radiator cooling fan draws 5% of the engine brake power. The fan pushes 2.8 m³.s⁻¹ of air against 0.9 kPa static pressure rise. Assuming air as incompressible, and ignoring other losses, the fan efficiency, in %, is nearest to
(Take π = 3.14)

A

58

B

60

C

63

D

65

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