A load of "W" kN is acting on a tyre having 160 mm nominal...

All Subjects Engineering Mathematics & Statistics Electrical Engineering, Instrumentation & Computers Thermodynamics, Fluid Mechanics & Theory of Machines Soil Mechanics, Engineering Mechanics & Strength of Materials Farm Machinery, Farm Power & Renewable Energy Engineering Processing and Food Engineering Soil and Water Conservation & Irrigation and Drainage Engineering

ICAR AIEEA PG 2024 - Agricultural Engineering and Technology

MCQ (Single Correct)

A spark ignition engine is idling at 500 rpm. If the average flame speed is \(10\text{ m}\cdot\text{s}^{-1}\) and the flame front must travel 50 mm from the spark plug to consume 85% of the fuel-air mixture, how much spark advance is needed if 85% of the fuel is to be consumed before the crankshaft reaches 10° after TDC?

एक स्पार्क इग्निशन इंजन 500 rpm पर आइडलिंग कर रहा है। यदि औसत ज्वाला गति (flame speed) \(10\text{ m/s}\) है और 85% ईंधन-हवा मिश्रण को जलाने के लिए फ्लेम फ्रंट को स्पार्क प्लग से 50 मिमी की दूरी तय करनी होगी, तो 85% ईंधन को क्रैंकशाफ्ट के टीडीसी (TDC) के बाद 10° तक पहुंचने से पहले समाप्त करने के लिए कितने स्पार्क एडवांस (spark advance) की आवश्यकता होगी?

5° 5° 15° 15° 5° 5° 5° 5°

Step-by-step spark advance calculation:

Engine rotational speed: \(N = 500\text{ rpm}\). - Angular speed in degrees per second: \[ \omega = \frac{500 \times 360^\circ}{60} = 3000^\circ/\text{s} \]
Time for flame to travel 50 mm:
\[ t = \frac{\text{Distance}}{\text{Flame Speed}} = \frac{0.050\text{ m}}{10\text{ m/s}} = 0.005\text{ seconds} \]
Crank angle rotated during flame travel:
\[ \Delta \theta = \omega \times t = 3000^\circ/\text{s} \times 0.005\text{ s} = 15^\circ \]
Spark timing calculation:
- Burning must finish at \(10^\circ\) After Top Dead Centre (ATDC). - Therefore, the spark must be initiated \(15^\circ\) prior to \(10^\circ\) ATDC: \[ \text{Spark Timing} = 10^\circ \text{ ATDC} - 15^\circ = -5^\circ = 5^\circ \text{ Before Top Dead Centre (BTDC)} \]

Thus, a spark advance of \(5^\circ\) is required.

गणना:

क्रैंकशाफ्ट की कोणीय गति \(= \frac{500 \times 360^\circ}{60} = 3000^\circ/\text{सेकंड}\) 2. ज्वाला द्वारा 50 मिमी तय करने में लगा समय \(= \frac{0.05\text{ m}}{10\text{ m/s}} = 0.005\text{ सेकंड}\) 3. 0.005 सेकंड में क्रैंक का घूर्णन कोण \(= 3000^\circ \times 0.005 = 15^\circ\)
यदि दहन TDC के 10° बाद समाप्त होना है, तो स्पार्क को TDC से \(15^\circ - 10^\circ = 5^\circ\) पहले (BTDC) होना चाहिए। अतः स्पार्क एडवांस 5° है।

Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report

ICAR AIEEA PG 2024 - Agricultural Engineering and Technology

MCQ (Single Correct)

A pair of straight teeth spur gears is transmitting power at 600 rpm and the pinion has 21 standard full depth involute teeth of module 7 mm. The pitch line velocity of the pinion is:

सीधे दांतों वाले स्पर गियर्स का एक युग्म 600 rpm पर शक्ति संचारित कर रहा है और पिनियन में 7 मिमी मॉड्यूल के 21 मानक पूर्ण गहराई वाले इनवोल्यूट दांत हैं। पिनियन का पिच लाइन वेग (pitch line velocity) क्या है?

09 m/s 09 m/s 22 m/s 22 m/s 32 m/s 32 m/s 62 m/s 62 m/s

Prev Next

53

ICAR AIEEA PG 2024 - Agricultural Engineering and Technology
MCQ (Single Correct)

English हिन्दी

A load of "W" kN is acting on a tyre having 160 mm nominal width. The effective friction coefficient of tyre and ground interaction is "\(\mu\)" and the kingpin offset is 10 mm. Assuming the tyre impression on ground as circle with diameter equal to nominal tyre width, the kingpin torque of the tyre in N·m will be:

160 मिमी नाममात्र चौड़ाई वाले टायर पर "W" kN का भार कार्य कर रहा है। टायर और जमीन के बीच प्रभावी घर्षण गुणांक "\(\mu\)" है और किंगपिन ऑफसेट 10 मिमी है। जमीन पर टायर के संपर्क क्षेत्र को नाममात्र टायर चौड़ाई के बराबर व्यास वाला वृत्त मानते हुए, N·m में टायर का किंगपिन टॉर्क क्या होगा?

\(W \mu \sqrt{3210}\) \(W \mu \sqrt{3210}\) Correct Incorrect \(\frac{W \mu \sqrt{3210}}{1000}\) \(\frac{W \mu \sqrt{3210}}{1000}\) Correct Incorrect \(W \mu \sqrt{3300}\) \(W \mu \sqrt{3300}\) Correct Incorrect \(\frac{W \mu \sqrt{3300}}{1000}\) \(\frac{W \mu \sqrt{3300}}{1000}\) Correct Incorrect

EXPLANATION Tractor Mechanics: Traction Mechanics, Stability, Center of Gravity, PTO, Hitching and Ergonomics

In steering geometry and tractor mechanics:
For a circular tyre contact patch of radius
\(R = \frac{160}{2} = 80\text{ mm}\), the square of the polar radius of gyration of the contact area is: \[ r_p^2 = \frac{R^2}{2} = \frac{80^2}{2} = \frac{6400}{2} = 3200\text{ mm}^2 \]
Given kingpin offset
\(e = 10\text{ mm}\), \(e^2 = 100\text{ mm}^2\). The combined effective radius arm for the kingpin pivoting resistance is: \[ r_{\text{eff}} = \sqrt{e^2 + r_p^2} = \sqrt{100 + 3200} = \sqrt{3300}\text{ mm} = \frac{\sqrt{3300}}{1000}\text{ m} \]
Vertical wheel load
\(= W\text{ kN} = 1000 W\text{ N}\). Kingpin torque (\(T_k\)): \[ T_k = \mu \times (1000 W) \times \frac{\sqrt{3300}}{1000} = W \mu \sqrt{3300}\text{ N}\cdot\text{m} \]
Thus, the torque in N·m is \(W \mu \sqrt{3300}\).

किंगपिन टॉर्क की गणना:

वृत्ताकार संपर्क सतह के लिए परिभ्रमण त्रिज्या का वर्ग \(r_p^2 = \frac{R^2}{2} = \frac{80^2}{2} = 3200\text{ mm}^2\) 2. किंगपिन ऑफसेट \(e = 10\text{ mm} \implies e^2 = 100\text{ mm}^2\)

प्रभावी भुजा \(= \sqrt{100 + 3200} = \sqrt{3300}\text{ mm}\) 4. भार \(W\text{ kN} = 1000 W\text{ N}\), अतः टॉर्क \(T = \mu \times (1000 W) \times \frac{\sqrt{3300}}{1000} = W \mu \sqrt{3300}\text{ N}\cdot\text{m}\)।

Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report

Prev Next

54

ICAR AIEEA PG 2024 - Agricultural Engineering and Technology
MCQ (Single Correct)

English हिन्दी

A 2WD tractor with a total weight of 20 kN has static weight distribution of 25% and 75% at the front and rear axles, respectively. When the tractor is operated on level ground, the maximum tractive force developed is 10 kN. If external weight of 5 kN is added to the rear axle, neglecting weight transfer, the change in maximum tractive force in kN is:

20 kN के कुल भार वाले एक 2WD ट्रैक्टर का फ्रंट और रियर एक्सल पर स्थिर वजन वितरण क्रमशः 25% और 75% है। जब ट्रैक्टर को समतल जमीन पर संचालित किया जाता है, तो विकसित अधिकतम कर्षण बल 10 kN होता है। यदि वजन हस्तांतरण की उपेक्षा करते हुए, पिछले धुरे (rear axle) पर 5 kN का अतिरिक्त भार जोड़ा जाता है, तो अधिकतम कर्षण बल में परिवर्तन (kN में) क्या होगा?

33 33 Correct Incorrect 33 33 Correct Incorrect 33 33 Correct Incorrect 33 33 Correct Incorrect

EXPLANATION Tractor Mechanics: Traction Mechanics, Stability, Center of Gravity, PTO, Hitching and Ergonomics

Step-by-step tractive force calculation:

Initial rear axle static load (\(W_{r1}\))\lt /strong\gt : \[ W_{r1} = 0.75 \times 20\text{ kN} = 15\text{ kN} \]

Traction coefficient (\(\mu\))\lt /strong\gt on the rear drive wheels: \[ \mu = \frac{\text{Maximum Tractive Force}}{W_{r1}} = \frac{10\text{ kN}}{15\text{ kN}} = \frac{2}{3} \]

New rear axle normal load (\(W_{r2}\))\lt /strong\gt after adding 5 kN ballast: \[ W_{r2} = 15\text{ kN} + 5\text{ kN} = 20\text{ kN} \]

New maximum tractive force (\(F_2\))\lt /strong\gt : \[ F_2 = \mu \times W_{r2} = \frac{2}{3} \times 20\text{ kN} = \frac{40}{3} = 13.33\text{ kN} \]

Change in maximum tractive force (\(\Delta F\))\lt /strong\gt : \[ \Delta F = F_2 - F_1 = 13.33\text{ kN} - 10\text{ kN} = 3.33\text{ kN} \]

Thus, the increase in maximum tractive force is 3.33 kN.

गणना:

पिछले पहियों पर प्रारंभिक भार \(= 0.75 \times 20 = 15\text{ kN}\)

कर्षण गुणांक \(\mu = \frac{10}{15} = \frac{2}{3}\) 3. 5 kN अतिरिक्त भार जोड़ने पर नया कर्षण बल \(= \mu \times (15 + 5) = \frac{2}{3} \times 20 = 13.33\text{ kN}\)

कर्षण बल में परिवर्तन \(= 13.33 - 10 = 3.33\text{ kN}\)।

Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report

Prev Next

55

ICAR AIEEA PG 2024 - Agricultural Engineering and Technology
MCQ (Single Correct)

English हिन्दी

The bulk temperature reached by the heat absorbing elements of a clutch after and before engagement are 200°C and 50°C respectively. The total mass of the heat absorbing elements is 10 kg. If "Q" joules of heat is generated in the clutch, required specific heat of heat-absorbing elements (in \(\text{J}\cdot\text{kg}^{-1}\cdot{}^\circ\text{C}^{-1}\)) will be:

क्लच के जुड़ने (engagement) के बाद और पहले ऊष्मा अवशोषित करने वाले तत्वों द्वारा प्राप्त किया गया तापमान क्रमशः 200°C और 50°C है। ऊष्मा अवशोषित करने वाले तत्वों का कुल द्रव्यमान 10 kg है। यदि क्लच में "Q" जूल ऊष्मा उत्पन्न होती है, तो ऊष्मा-अवशोषक तत्वों की आवश्यक विशिष्ट ऊष्मा (\(\text{J}\cdot\text{kg}^{-1}\cdot{}^\circ\text{C}^{-1}\) में) क्या होगी?

\(\frac{10Q}{150}\) \(\frac{10Q}{150}\) Correct Incorrect \(\frac{Q}{1500}\) \(\frac{Q}{1500}\) Correct Incorrect \(\frac{10Q}{250}\) \(\frac{10Q}{250}\) Correct Incorrect \(\frac{Q}{2500}\) \(\frac{Q}{2500}\) Correct Incorrect

EXPLANATION Tractor Mechanics: Traction Mechanics, Stability, Center of Gravity, PTO, Hitching and Ergonomics

According to the principle of sensible heat transfer:
\[ Q = m \cdot c \cdot \Delta T \]
Given parameters:
Heat generated in clutch =
\(Q\) Joules Mass of absorbing elements, \(m = 10\text{ kg}\) Temperature change, \(\Delta T = T_{\text{after}} - T_{\text{before}} = 200^\circ\text{C} - 50^\circ\text{C} = 150^\circ\text{C}\) Solving for specific heat \(c\): \[ Q = 10 \times c \times 150 = 1500 \cdot c \] \[ c = \frac{Q}{1500}\text{ J}\cdot\text{kg}^{-1}\cdot{}^\circ\text{C}^{-1} \]
Thus, the specific heat is \(\frac{Q}{1500}\).

ऊष्मा हस्तांतरण सूत्र: \(Q = m \cdot c \cdot \Delta T\) \(\Delta T = 200 - 50 = 150^\circ\text{C}\)
\(Q = 10 \times c \times 150 = 1500 c \implies c = \frac{Q}{1500}\text{ J}\cdot\text{kg}^{-1}\cdot{}^\circ\text{C}^{-1}\)।

अतः सही उत्तर \(\frac{Q}{1500}\) है।

Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report

Prev Next

Prevपिछला Nextअगला

Prev Next

Paper Analysis
TOTAL QUESTIONS

Engineering Mathematics & Statistics 8

Electrical Engineering, Instrumentation & Computers 7

Thermodynamics, Fluid Mechanics & Theory of Machines 15

Soil Mechanics, Engineering Mechanics & Strength of Materials 8

Farm Machinery, Farm Power & Renewable Energy Engineering 28

Processing and Food Engineering 26

Soil and Water Conservation & Irrigation and Drainage Engineering 28

Agricultural Engineering and Technology Subjects

Browse all chapters by subject

Engineering Mathematics & Statistics
6 Topics

Descriptive Statistics, Measures of Central Tendency, Dispersion and Correlation Probability Theory, Theoretical Probability Distributions, Sampling and Hypothesis Testing Differential and Integral Calculus, Ordinary Differential Equations (ODEs) and Partial Differential Equations (PDEs) Linear Algebra, Matrices, Determinants, Eigenvalues and Linear Systems Vector Calculus, Coordinate Systems, Gradient, Divergence and Curl Numerical Analysis, Root Finding, Numerical Integration and Finite Differences

Electrical Engineering, Instrumentation & Computers
5 Topics

Electric Motors, Single-Phase and Three-Phase Induction Motors and Motor Starters Electric Power Generation, Transmission, Distribution, Wiring and Protective Fuses Direct Current (DC) and Alternating Current (AC) Circuits, Network Theorems and Power Factor Electronic Instrumentation, Sensors, Transducers, Signal Conditioning and Data Acquisition Computer Fundamentals, Operating Systems, Machine Languages and High-Level Programming

Thermodynamics, Fluid Mechanics & Theory of Machines
6 Topics

Theory of Machines: Kinematics, Mechanisms, Gear Trains, Belts, Cams and Governors Psychrometrics, Psychrometric Charts, Air Conditioning and Refrigeration Cycles Fluid Dynamics, Continuity Equation, Bernoulli Equation, Pipe Flow, Boundary Layer and Viscosity Heat Transfer: Conduction, Convection, Radiation, Heat Exchangers and Insulation Thermodynamics Fundamentals, Thermodynamic Laws, Processes and Gas Power Cycles Fluid Statics, Hydrostatic Pressure, Manometers, Buoyancy and Flotation

Soil Mechanics, Engineering Mechanics & Strength of Materials
6 Topics

Soil Mechanics: Phase Relations, Soil Index Properties, Particle Size and Consistency Limits Engineering Mechanics: Statics, Force Systems, Equilibrium, Friction, Trusses and Centroids Shear Strength of Soil, Mohr-Coulomb Theory, Earth Pressure and Retaining Walls Soil Compaction, Permeability, Seepage and Consolidation Bending Moments, Shear Forces, Deflection of Beams and Torsion of Shafts Strength of Materials: Stress, Strain, Elastic Moduli and Hookes Law

Farm Machinery, Farm Power & Renewable Energy Engineering
8 Topics

Harvesting and Threshing Machinery: Reapers, Mowers, Combine Harvesters and Threshers Internal Combustion (IC) Engines: 2-Stroke, 4-Stroke, Engine Components, Cycles and Performance Primary Tillage Implements: Mouldboard Plough, Disc Plough, Subsoiler and Chisel Plough Renewable Energy: Solar Energy, Biomass, Biogas Plants, Gasifiers, Biofuels and Wind Energy Tractor Mechanics: Traction Mechanics, Stability, Center of Gravity, PTO, Hitching and Ergonomics Active Tractor Systems: Fuel, Cooling, Lubrication, Electrical, Transmission and Hydraulics Secondary Tillage, Sowing and Planting Equipment: Harrows, Cultivators, Seed Drills and Planters Plant Protection Equipment: Sprayers, Dusters, Nozzles, Calibration and Droplet Dynamics

Processing and Food Engineering
6 Topics

Milling and Processing of Agricultural Produce: Rice, Wheat, Pulses, Oilseeds and Thermal Food Processing Physical, Thermal, Aerodynamic and Mechanical Properties of Agricultural and Food Materials Cleaning, Grading, Sorting, Separation and Material Handling Equipment Grain Storage Structures, Bag and Bulk Storage, Silo Design (Janssen and Airy Theories) Drying and Dehydration of Grains: Thin Layer, Deep Bed, Drying Models and Grain Dryers Size Reduction, Crushing, Grinding Laws, Mixing and Mechanical Separation

Soil and Water Conservation & Irrigation and Drainage Engineering
7 Topics

Hydrology: Precipitation, Runoff Estimation, Hydrographs, Flood Routing and Groundwater Irrigation Engineering: Soil-Water-Plant Relationships, Crop Water Requirement and Evapotranspiration Surface and Pressurized Irrigation Systems: Border, Furrow, Basin, Sprinkler and Drip Irrigation Surveying and Levelling: Chain, Compass, Levelling, Contouring, Plane Table and Theodolite Soil Erosion Mechanics, Water Erosion, Wind Erosion and Universal Soil Loss Equation (USLE) Agricultural Drainage: Surface and Subsurface Drainage Systems, Hooghoudts Equation and Soil Salinity Control Soil and Water Conservation Structures: Bunds, Terraces, Gully Control, Drop and Chute Spillways

Official PYQ Papers

Previous Year Papers of Agricultural Engineering and Technology

Practice official shift-wise question papers with answer keys and detailed explanations on the actual exam pattern.

3

Total Available Previous Papers

2024 29-06-2024

ICAR AIEEA PG 2024 - Agricultural Engineering and Technology

120 Questions Bilingual

Practicing Now

2023 14-07-2023

ICAR AIEEA PG Agriculture Engineering 14 July 2023 (Shift 1) Paper

120 Questions Bilingual

Practice Now

2023 09-07-2023

ICAR AIEEA PG Agricultural Engineering & Technology 09 July 2023 (Shift 1) Paper

120 Questions Bilingual

Practice Now

Choose Exam
Exam Directory

Browse official Previous papers and mock tests

10 Major Agriculture Exams Available

RPSC Agriculture Exams

4 Exams

Assistant Agriculture Officer Agriculture Officer RPSC Agriculture Research Officer RPSC AARO

RSSB Agriculture Exams

1 Exam

RSSB Agriculture Supervisor

National & PG Entrances

4 Exams

ICAR AIEEA PG Active
CUET UG Rajasthan Agriculture Pre-PG ICAR JRF/SRF

Other Agriculture Examinations

1 Exam

Food Safety Officer

A load of "W" kN is acting on a tyre having 160 mm nominal... | Agrigyan

Agricultural Engineering and Technology Subjects

Engineering Mathematics & Statistics

Electrical Engineering, Instrumentation & Computers

Thermodynamics, Fluid Mechanics & Theory of Machines

Soil Mechanics, Engineering Mechanics & Strength of Materials

Farm Machinery, Farm Power & Renewable Energy Engineering

Processing and Food Engineering

Soil and Water Conservation & Irrigation and Drainage Engineering

Previous Year Papers of Agricultural Engineering and Technology

ICAR AIEEA PG 2024 - Agricultural Engineering and Technology

ICAR AIEEA PG Agriculture Engineering 14 July 2023 (Shift 1) Paper

ICAR AIEEA PG Agricultural Engineering & Technology 09 July 2023 (Shift 1) Paper

Choose Exam

RPSC Agriculture Exams

RSSB Agriculture Exams

National & PG Entrances

Other Agriculture Examinations