Question

In the proportioning pump, two speed pump has a non-synchronous _____ rpm motor.

(a) 10 rpm

(b) 30 rpm

(c) 45 rpm

(d) 15 rpm

I got this question in class test.

This interesting question is from Medical Diagnosis with Chemical Tests in section Clinical Laboratory Instruments of Biomedical Instrumentation

Answer 1

Correct option is (c) 45 rpm

Easiest explanation: Proportioning pumps are available either for single-speed or for two-speed operations. The single-speed pump has the capacitor synchronous gear head utilizing 10 rpm output shaft at 50 Hz. The two-speed pump has a non-synchronous 45 rpm motor.