Gce Model Questions Vol1 2021 Physics Question 43

Practice objective / multiple choice question 43 from the 2021 Gce Model Questions Vol1 Physics examination.

Gce Model Questions Vol1 2021 Physics Objective / Multiple Choice Medium Difficulty
Question 43 GCE_MODEL_QUESTIONS_VOL1 • 2021 • PHYSICS • objective

A 2 kW motor runs at 1500 rpm and drives a two‑stage gearbox. The first stage has a gear ratio of 4 : 1 (input : output) and an efficiency of 90 %. The second stage has a ratio of 3 : 1 and an efficiency of 85 %. The output shaft of the second stage drives a pulley of radius 0.20 m that moves a conveyor belt. Calculate (i) the torque delivered to the belt, (ii) the linear speed of the belt, and (iii) the overall efficiency of the system.

Answer Options

A. Torque \approx 9.8\times10^{1}\,N·m, belt speed \approx 3.00\,m\/s, overall efficiency \approx 65.0\%
B. Torque \approx 1.30\times10^{2}\,N·m, belt speed \approx 2.45\,m\/s, overall efficiency \approx 80.0\%
C. Torque \approx 1.05\times10^{2}\,N·m, belt speed \approx 2.80\,m\/s, overall efficiency \approx 70.0\%
Correct Answer D. Torque \approx 1.17\times10^{2}\,N·m, belt speed \approx 2.62\,m/s, overall efficiency \approx 76.5\%
Correct Answer
D
Correct Option:
Torque \approx 1.17\times10^{2}\,N·m, belt speed \approx 2.62\,m/s, overall efficiency \approx 76.5\%

About This Question

This is Gce Model Questions Vol1 2021 Physics Question 43. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Physics examination.

Difficulty level: Medium .

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