MASS Test Technical Reading Comprehension 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?

Accepted Answer

Lubricate it with clean system fluid.

Answer

Depressurize the system.

Answer

Place a drain pan beneath the housing.

Answer

Turn the housing counter-clockwise.

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 |

Accepted Answer

Gear-M 220

Answer

Hydro-L 32

Answer

Synth-H 68

Answer

Chain-T 150

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?

Accepted Answer

The system relief valve setting.

Answer

The motor's voltage supply.

Answer

The viscosity of the hydraulic fluid.

Answer

The ambient operating temperature.

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?

Accepted Answer

Disconnect and lock out the power source.

Answer

Wear insulated gloves.

Answer

Open the panel to inspect the wiring.

Answer

Confirm that you are qualified personnel.

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?

Accepted Answer

A pneumatic motor

Answer

An air compressor

Answer

A pressure gauge

Answer

A filter-regulator unit

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?

Accepted Answer

80%

Answer

125%

Answer

90%

Answer

20%