Deck 37: Conveying Systems

Question 1

The escalator stair sizes established in ANSI/ASME A17.1 require a maximum rise of ____ in. and a max depth of 15 3/4 in.

A) 8 1/2
B) 9 1/2
C) 10 1/2
D) 11 1/2

Answer 1

A

Question 2

What are counterweights?

Answer 2

Counterweights are stacked plates that slide on vertical steel guides. As an elevator rises, they lower, and as the elevator lowers, they rise. Counterweights generally equal the weight of the unloaded car and hoisting wires plus a percentage of the load capacity of the elevator. Since they rely on gravity, they help raise the car, thus reducing the overall power required.

Question 3

Describe observation elevators.

Answer 3

Observation elevators move up a hoistway secured to the exterior of a building. Cars are designed with glass walls to provide panoramic views of surrounding areas as the elevator rises. The elevators may be geared, gear less, or hydraulic, and the hoisting machinery is hidden. The lower end of the hoistway (at the ground) must be enclosed with a safety barrier.  As with all circulation systems, elevators doors and cars must be large enough to accommodate wheelchair use.

Question 4

____ systems provide horizontal transportation for distances beyond the practical limits of moving walks.

A) Pneumatic tube
B) Conveyor
C) Crane
D) Shuttle transit

Question 5

____ is/are used to stop the movement of a car and hold it in position.

A) Roping
B) Winding drum machines
C) Operating systems
D) Car safeties

Question 6

____ are inclined, continuous, power-driven stairways used to move passengers up or down between floors.

A) Dumbwaiters
B) Chair lifts
C) Stair lifts
D) Escalators

Question 7

____ elevators are used mainly for low-rise installations up to six stories.

A) Freight
B) Hydraulic
C) Electric
D) Residential

Question 8

____ are energy-absorbing units located at the bottom of the hoistway that absorb any impact from a car that descends below the normal lowest level.

A) Hoists
B) Ropes
C) Buffers
D) Cushions

Question 9

Describe the basic characteristics of wheelchair lifts.

Question 10

What are moving walks?

Question 11

Describe gearless traction elevators.

Question 12

____ systems control the operation of several cars that serve the same floors using a supervisory control system.

A) Group automatic
B) Single automatic
C) Typical operator-controlled
D) Selective collective automatic

Question 13

List some of the design requirements for hoistways.

Question 14

An elevator rated at 1,500 lbs. would be marked to carry a maximum of ____ people.

A) 8
B) 10
C) 15
D) 20

Question 15

What is single-wrap roping?

Question 16

Discuss the function of cranes and hoists, and list the different types.

Question 17

Describe elevator hoistways.

Question 18

The elevator ____ , a platform enclosed by walls and a roof, is designed to carry passengers, freight, and other specialty loads, such as hospital beds and stretchers.

A) car
B) hoistway
C) vent
D) machine room

Question 19

Describe typical layouts of escalator systems.

Question 20

A ____ is a mechanism used to raise and lower a small car vertically within a building.

A) tote box
B) cart transfer system
C) dumbwaiter
D) horizontal tote box transfer system