Exam Question
If a radial piston hydraulic pump fails to deliver rated fluid volume, the cause can be: (16)
(a) Contaminated fluid
(b) Pitted thrust rings
(c) Wom pintle bearings
(d) Obstructed suctions passage
Briefly justify your answer.
Class 4 (4th Engineer)
MEKG
📅 Nov 2024
Reference Answer
The correct answer is **(d) Obstructed suction passage**. However, for a comprehensive Class 1 level analysis, all potential causes must be evaluated in detail, as they are often interrelated. The failure to deliver rated fluid volume is fundamentally a problem of reduced volumetric efficiency ($$\eta_v$$).
### Detailed Justification of All Options
#### 1. (d) Obstructed Suction Passage (Chosen Answer)
This condition, also known as pump starvation, is a primary and immediate cause for a significant drop in fluid delivery. It directly prevents the pump from drawing in a full charge of hydraulic fluid during its suction stroke.
### Detailed Justification of All Options
#### 1. (d) Obstructed Suction Passage (Chosen Answer)
This condition, also known as pump starvation, is a primary and immediate cause for a significant drop in fluid delivery. It directly prevents the pump from drawing in a full charge of hydraulic fluid during its suction stroke.
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