MASS Test Technical Reading Comprehension Questions and Answers 1 — Questions and Answers
Question 1: Read the following maintenance procedure: 'Procedure 4.1: Filter Replacement. CAUTION: Ensure system is depressurized before proceeding. Step 1: Place a drain pan beneath the filter housing. Step 2: Using a 24mm strap wrench, turn the housing counter-clockwise to loosen. Step 3: Remove the old filter element and O-ring. Step 4: Lubricate the new O-ring with clean system fluid before installation.' According to this procedure, what must be done immediately before installing the new O-ring?
- Depressurize the system.
- Place a drain pan beneath the housing.
- Lubricate it with clean system fluid. (Correct answer)
- Turn the housing counter-clockwise.
Correct answer: Lubricate it with clean system fluid.
The text explicitly states in Step 4, 'Lubricate the new O-ring with clean system fluid before installation.' This is the final preparatory step before the new O-ring is physically installed.
Question 2: A technician is servicing a piece of equipment and consults the lubricant specification chart below. The equipment is a standard enclosed gearbox operating in a factory where the ambient temperature is consistently between 15°C and 35°C. Which lubricant is the most appropriate choice? | Lubricant | ISO VG | Temp Range (°C) | Application | |---|---|---|---| | Hydro-L 32 | 32 | -10 to 60 | Light-duty hydraulics | | Gear-M 220| 220| 0 to 95 | Enclosed gearboxes | | Synth-H 68 | 68 | -20 to 120 | High-temp hydraulics | | Chain-T 150| 150| -5 to 80 | Conveyor chains |
- Gear-M 220 (Correct answer)
- Hydro-L 32
- Synth-H 68
- Chain-T 150
Correct answer: Gear-M 220
The application is an 'Enclosed gearbox', which matches Gear-M 220. The operating temperature (15°C to 35°C) is well within the acceptable temperature range (0 to 95°C) for Gear-M 220. The other lubricants are for different applications (hydraulics, chains).
Question 3: A technical manual describes a troubleshooting process: 'Symptom: Low Output Pressure. Possible Causes: (1) Clogged suction strainer. (2) Worn pump seals. (3) Incorrect motor rotation. (4) System relief valve set too low.' A technician has already verified that the suction strainer is clean and the motor rotates correctly. According to the manual, which of the following is a logical next item to investigate?
- The motor's voltage supply.
- The system relief valve setting. (Correct answer)
- The viscosity of the hydraulic fluid.
- The ambient operating temperature.
Correct answer: The system relief valve setting.
The technician has eliminated causes (1) and (3) from the manual's list. The remaining possible causes are (2) Worn pump seals and (4) System relief valve set too low. Of the answer choices provided, investigating the system relief valve setting is a direct troubleshooting step from the manual.
Question 4: A warning label on an electrical control panel reads: 'DANGER: Hazardous Voltage. Contact may cause electric shock or burn. Disconnect and lock out power source before opening or servicing. Only qualified personnel should perform work on this equipment.' Based on this label, what is the most critical action that must be performed to ensure safety before servicing?
- Wear insulated gloves.
- Open the panel to inspect the wiring.
- Confirm that you are qualified personnel.
- Disconnect and lock out the power source. (Correct answer)
Correct answer: Disconnect and lock out the power source.
While being qualified is a requirement, the label explicitly commands the primary action to prevent the hazard: 'Disconnect and lock out power source before opening or servicing.' This step de-energizes the equipment, which is the most critical action to prevent electric shock.
Question 5: In a pneumatic diagram, a symbol shows a circle with a solid, equilateral triangle inside, where the triangle points outwards from the center. What does this component symbol represent?
- A pneumatic motor (Correct answer)
- An air compressor
- A pressure gauge
- A filter-regulator unit
Correct answer: A pneumatic motor
According to ISO 1219 standard symbols for fluid power, a circle represents a rotary energy conversion device. A solid triangle indicates the direction of fluid flow (in this case, pneumatic). An outward-pointing triangle signifies an output device, like a motor, which converts pneumatic energy into mechanical motion. An inward-pointing triangle would represent a pump or compressor.
Question 6: A technical passage states: 'The efficiency of a mechanical system is the ratio of work output to work input, expressed as a percentage. It is calculated by dividing the Actual Mechanical Advantage (AMA) by the Ideal Mechanical Advantage (IMA) and then multiplying the result by 100.' A technician tests a pulley system and finds it has an IMA of 5 and an AMA of 4. What is the efficiency of this system?
- 125%
- 90%
- 80% (Correct answer)
- 20%
Correct answer: 80%
Following the formula given in the passage, Efficiency = (AMA / IMA) * 100. Using the provided values: (4 / 5) * 100 = 0.8 * 100 = 80%.
MASS Test Technical Reading Comprehension Questions and Answers 1
Read the following maintenance procedure: 'Procedure 4.1: Filter Replacement.
CAUTION: Ensure system is depressurized before proceeding.
Step 1: Place a drain pan beneath the filter housing.
Step 2: Using a 24mm strap wrench, turn the housing counter-clockwise to loosen.
Step 3: Remove the old filter element and O-ring.
Step 4: Lubricate the new O-ring with clean system fluid before installation.' According to this procedure, what must be done immediately before installing the new O-ring?