Equipment Operation & Maintenance Flashcards
7 cards from real SHS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Equipment Operation & Maintenance flashcards as text
A forklift's nameplate indicates a rated load capacity of 5,000 lbs at a 24-inch load center. What happens to rated capacity when the load center is shifted further from the forks?
Answer: Rated capacity decreases because the effective moment arm increases
Moving the load center farther from the forks increases the overturning moment, reducing the effective safe load capacity below the nameplate rating.
When should a safety relief device on a compressed gas cylinder be tested or replaced?
Answer: According to the manufacturer's specification and regulatory requirements for the cylinder type
Relief device testing and replacement intervals are specified by manufacturers and regulations (e.g., DOT, CGA) based on cylinder type, service conditions, and gas contents.
Which hazard is specifically addressed by requiring a 'permit-required confined space' entry procedure before maintenance inside equipment such as storage tanks or boilers?
Answer: Atmospheric hazards, engulfment, entrapment, and limited egress
Permit-required confined space procedures address atmospheric hazards (oxygen deficiency, toxic gases, flammable vapors), engulfment risks, and limited ability to exit in an emergency.
A maintenance technician replaces a motor coupling but does not realign the shaft before restarting the machine. What is the most likely consequence?
Answer: Premature bearing failure, increased vibration, and possible shaft damage
Misaligned shafts transmit uneven forces to bearings and couplings, accelerating wear and causing vibration that can lead to mechanical failure.
Under NFPA 70E, what level of PPE is required for work on energized electrical equipment where the incident energy is determined to be 8 cal/cm²?
Answer: PPE Category 2 (minimum 8 cal/cm² arc rating)
NFPA 70E PPE Category 2 requires a minimum arc rating of 8 cal/cm², which matches or exceeds an 8 cal/cm² incident energy level.
A safety specialist is evaluating a mobile elevated work platform (MEWP) inspection checklist. Which item is most critical to verify before each use?
Answer: Functional emergency lowering device and safety harness anchor points
The emergency lowering device and fall protection anchor points are life-safety components that must be confirmed functional before each use of a MEWP.
Which type of maintenance error is most commonly associated with returning equipment to service without proper functional testing?
Answer: Normalization of deviance leading to acceptance of incomplete procedures
Normalization of deviance occurs when skipping post-maintenance functional tests becomes accepted practice over time, increasing the risk of failure upon return to service.