Question Statement:
Which of the following performance tests are mandatory standard procedures under official tractor testing codes (such as BIS 12207, OECD Code 2, or Nebraska Tractor Tests)?
Options:
- (A) PTO performance test across full engine speed range to determine maximum power, rated power, torque, and specific fuel consumption.
- (B) Drawbar pull and drawbar power test on a standardized concrete test track to measure tractive efficiency and maximum pull.
- (C) Hydraulic lift capacity test throughout the full travel range of the three-point linkage.
- (D) Continuous sound level measurement at the operator's ear with cab and open roll-bar.