Answers (2026/2027) | Updated Review |
A+ Verified
• If an outside hoist (rack & pinion) is not plumb, level and square, what can happen?
CORRECT ANSWER: The hoist can go on safety
• Sec 625 p12 Fig 18 - hoist motor making noise, what's the problem? CORRECT
ANSWER: Check capacitor
• Dumbwaiter maximum volume / weight calc CORRECT ANSWER: 4 ft × 9 sq ft × 13.9
lb / cu ft = ≈ 500 lb
• Arrive at site with freight doors, one side hanging down - first step? CORRECT
ANSWER: Block doors; use their disconnect
• Where to check after resetting a step level switch? CORRECT ANSWER: Stepband
of upper & lower truss
• Escape hatch opens which way? CORRECT ANSWER: Outward
• Typical reading on a high-rise gate circuit CORRECT ANSWER: 1.8 Ω
• What print shows fixture locations? CORRECT ANSWER: Job abstract
• 12 floors, 3 cars; no PI's on 3 floors - how many PI's needed? CORRECT ANSWER:
36 − 9 = 27 PI's
• 1760 RPM motor @ 60 Hz → 600 RPM = ? Hz CORRECT ANSWER: ≈ 20.4 Hz
• Drill method for soft soil CORRECT ANSWER: Rotary
• Encoder gives sawtooth waveform—good or bad? CORRECT ANSWER: Bad; square
wave is proper
• Hand signal for "extend boom" CORRECT ANSWER: Fists in front, thumbs out
• Moving controller 30 ft → voltage drop fix? CORRECT ANSWER: Use larger wires
• Governor tripping speeds CORRECT ANSWER: Gov 115 % of rated; OS switch 90 %
of Gov
• PI goes out fast at 2nd floor - problem? CORRECT ANSWER: Faulty contacts (per
print)
,• Static load test: car sinks 15″ in 10 min - no visible leak? CORRECT ANSWER:
Underground leak
• Substitute for top rail on barricade CORRECT ANSWER: Steel cable
• Who must provide MSDS sheet? CORRECT ANSWER: Employer
• Requirement for false platform CORRECT ANSWER: Safeties
• Cat 1 oil buffer test return time CORRECT ANSWER: 60 s slow speed
• Replacing controller board - power off - next step? CORRECT ANSWER: Wear
ground strap
• Who gives you the right to a safe workplace? CORRECT ANSWER: OSHA
• Questionable barricade 42nd floor - what do? CORRECT ANSWER: Write report →
GC/Super
• Normal limit suspect faulty - how to test? CORRECT ANSWER: Kill main line & check
Ω
• Measure escalator handrail for replacement how? CORRECT ANSWER: Mark &
measure along incline only
• Residential car in confined space - requirement? CORRECT ANSWER: Mechanical
self-holding
• Max degrees bend w/out pull box CORRECT ANSWER: 360°
• Prevent machine side movement CORRECT ANSWER: Kick angles
• Diode in brake circuit purpose CORRECT ANSWER: Smooth closure / no slam
• Using a megger - what to do first? CORRECT ANSWER: Remove other circuits
• Shock from temp run button - why? CORRECT ANSWER: Bad ground
• 4 rope rigging - best angle CORRECT ANSWER: 60°
• Spare wires to pull % CORRECT ANSWER: 10 %
• Freight door motor spins, door doesn't move - why? CORRECT ANSWER: Wrong
chain lube
, • On top of dumbwaiter - safety rule CORRECT ANSWER: Power off; never fully on top
• PSI↔gallons conversion CORRECT ANSWER: 231 cu in = 1 gal
• Sensors on vertical lift CORRECT ANSWER: Min 2 @ 15 lb within 2″ down
• Brake circuit R1/R2 function CORRECT ANSWER: R1 build rate; R2 release time &
induced path
• Rack & pinion contractor wants to move hoist - need what? CORRECT ANSWER:
Extension tubes & ties
• Escalator 10″ too low - why? CORRECT ANSWER: Wrong column mark
• Max angle for moving walk CORRECT ANSWER: ≤ 12°
• Ward-Leonard: all 3 contacts close - result? CORRECT ANSWER: High speed run
• Safeties for 300 FPM car CORRECT ANSWER: Type B wedge
• Fuse blows same spot - cause CORRECT ANSWER: Exposed traveling cable
• mm → inch conversion CORRECT ANSWER: 25.4 mm = 1″
• Above-top terminal - what prevents hit on CWT buffer? CORRECT ANSWER: Buffer
clearance device / runby limits
• Gas welding cylinders storage CORRECT ANSWER: Vertical & 12 ft apart
• AC contactor chatters - why? CORRECT ANSWER: Broken shading coil
• Faulty relay—spring under armature missing—effect? CORRECT ANSWER:
Armature may hang due to residual magnetism
• Elevator 4200 lb, capacity 3000 lb—CWT for 40 % load? CORRECT ANSWER: 3000
× 0.4 = 1200 + 4200 = 5400 lb
• How are interlocks wired? CORRECT ANSWER: In series
• Hydro pump runs but car won't move—why? CORRECT ANSWER: Relief valve not
adjusted properly
• After installing governor, what's next step? CORRECT ANSWER: Install tension
sheave & attach cable