Mech Test Elevator Questions and Complete Solutions Graded A+

1. RPM formula Answer: 60 x (Frequency) / (P/2) 2. # of counterweights formula Answer: 3. CWT Governor Tripping Speed Answer: Tripping speed should be 10% Higher then Car Govt Tripping Speed 4. Total CWT weight equals? Answer: Generally weight of the car plus 40% of capacity load. EX. 5000lb car with 2000lb capacity. CWT = 5k + 800(40% x 2k) = 5800 5. Watts (P) Answer: ExI RxI^2 E^2/R 6. Volts (E) Answer: RxI P/I Square root of PxR 7. Amps (I) Answer: Sqr Root of P/R P/E E/R 8. Ohms (R) Answer: P/I^2 E^2/P E/I 9. Inverter Answer: 10. And Answer: 11. Or Answer: 12. Nand Answer: 13. Nor Answer: 14. Exclusive Or Answer: 15. You've been provided with an unfamiliar brand of solvent. What is the best source for information on it? Answer: SDS 16. A ladder needs to extend 20' from the floor to next landing. How far from the wall should the base be? Answer: 5', base always 1/4 of the distance from wall to base. 17. How would you get into a pit to service an elevator buffer? Answer: Operate the bottom hoist way access switch 18. ASME A17.1 Code states you must have what two things in the pit? Answer: Pit Switch and Light Switch 19. What prevents planks from slipping? Answer: Cleats nailed to the underside of the plank 20. What is best used for determining the correct rope drop from the machine drive sheave to the hitch plate? Answer: A plumb line. 21. Valve spring is shown at 1 3/8" and the drawing scale is 1 to 4. What is the actual size? Answer: 5 1/2. 1 3/8 x 4 is 4 and 24/16 or 5 and 8/16 or 1/2 22. Standard Rail is how many feet? Answer: 16' 23. A safety hitch connecting arm's dimensions are 1 1/4". What is the metric equivalent? Answer: 1 cm = .3937" 1 1/4 = 1.25" so 1.25/.3937 = 3.175 cm 24. A moving walk layout indicates a clearance of 6.5 mm for a pallet roller. What dimension would you read in inches on your ruler? Answer: 1mm = .03937" 6.5 (.03937)= .256" 25. You're assembling a CWT in the pit with the following parameters. Cable Length 175' Rope stretch 12"/100' Height of buffer and stand 3' CWT runby 10' Pit Depth 6' At what height will you block the CWT? Answer: The factors here are Stretch, Buffer and stand height, and Runby. Buffer 3' or 36" Runby 10' Rope stretch is 21". 12" per 100' (175 is 100+75, so 12"+9") Total is 67" 26. Drilling a hole into a machine beam, what can you use to prevent the drill bit from walking? Answer: Center Punch Hydro Elevator, what