GATE AG 2025 • Q53 NAT • 2 Marks

Section 3: Farm Power

Tractors and Power Tillers

Subtopic: Type, selection, maintenance and repair of tractors and power tillers

Question Statement:

Engine torque-speed data: T_maxP=125 N·m at N_maxP=2400 rpm; N_HI (high idle)=2600 rpm; T_max=160 N·m at N_maxT=1450 rpm. Find the Governor's regulation (%). (Rounded to 2 decimal places)

Official Answer Key:

7.90 to 8.10

Step-by-Step Solution & Explanation

Governor regulation = (N_HI − N_maxP)/[(N_HI+N_maxP)/2] × 100, i.e., the speed rise (no-load to rated) expressed as a percentage of the mean of the two speeds = (2600−2400)/[(2600+2400)/2]×100 = 200/2500×100 = 8.00%.

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