Ramsay Test Mechanical Maintenance 3 — Questions and Answers
Question 1: In a hydraulic system, force is transmitted through:
- An incompressible fluid under pressure (Correct answer)
- Compressed air
- Electrical current
- Mechanical springs only
Correct answer: An incompressible fluid under pressure
Hydraulics use pressurized incompressible fluid to transmit and multiply force.
Question 2: A pump that fails to prime and makes a rattling noise is likely experiencing:
- Cavitation from air or low suction (Correct answer)
- Too much output pressure
- Overheating bearings only
- Excess lubrication
Correct answer: Cavitation from air or low suction
Cavitation occurs when air or vapor bubbles form and collapse due to poor suction.
Question 3: Which lubricant type is generally best for high-speed, low-load bearings?
- Light oil (Correct answer)
- Heavy grease
- No lubricant
- Solid graphite block
Correct answer: Light oil
Light oil reduces drag and dissipates heat better than grease at high speeds.
Question 4: The primary function of a coupling between a motor and a pump is to:
- Transmit torque while tolerating minor misalignment (Correct answer)
- Increase voltage
- Filter the fluid
- Cool the motor
Correct answer: Transmit torque while tolerating minor misalignment
Couplings connect shafts to transmit rotational power and absorb slight misalignment.
Question 5: A micrometer reads 0.250 inch when the spindle is closed against the anvil. This means:
- The micrometer needs to be zeroed/calibrated (Correct answer)
- The part is 0.250 inch thick
- The micrometer is accurate
- The anvil is missing
Correct answer: The micrometer needs to be zeroed/calibrated
A closed micrometer should read zero; any other value indicates a calibration error.
Question 6: What does a feeler gauge measure?
- The clearance gap between two surfaces (Correct answer)
- Shaft rotational speed
- Fluid pressure
- Belt length
Correct answer: The clearance gap between two surfaces
Feeler gauges are thin blades used to measure small gaps and clearances.
Question 7: When chain drive is too loose, the typical symptom is:
- Chain whip, jumping, or skipping sprocket teeth (Correct answer)
- Increased efficiency
- Reduced noise
- Higher output speed
Correct answer: Chain whip, jumping, or skipping sprocket teeth
A loose chain can whip, jump teeth, and wear sprockets prematurely.
Ramsay Test Mechanical Maintenance 3
In a hydraulic system, force is transmitted through: