PRELIMS 1

Question 1

A power driven, inclined, continuous stairway for raising or lowering passengers; also referred to as moving stairway or as an electric stairway; Invented by Jesse Reno (1892).

Answer 1

Escalator

Question 2

Size, Capacity and Speed

Answer 2

30deg from the horizontal axis- ideal installation angle

125 fpm along the axis of riseescalator speed but may vary from 90 fpm- 120 fpm (actual practice)

Question 3

A three (3) section built-up welded steel trussed framework which supports the moving stairway equipment.

Answer 3

Truss

Question 4

Include top and bottom sprocket wheels where the endless belt of steps pass around when it is on operation.

Answer 4

Sprocket Assemblies

Question 5

Provides the motive power of the unit.

Answer 5

Driving machine

Question 6

Designed for maximum safety of persons stepping on or off the escalator. It includes all enclosures consisting of deckboards, concave inside panel skirt guards, handrails and combplates.

Answer 6

Balustrade Assembly

Question 7

It is a continuous belt (chain) attached to the handrail and indirectly connected to the steps.

Answer 7

Endless Belt

Question 8

A continuous assembly of steps which supports the passengers.

Answer 8

Step Assembly

Question 9

It is located at the top sprocket and will stop a loaded escalator safely in the event of a break in the chain.

Answer 9

Emergency Brake

Question 10

Consists of relays and a circuit breaker normally located near the driving machine.

Answer 10

Controller

Question 11

wired to the controller and placed near or on the escalator housing which will stop the driving machine and apply the brake.

Answer 11

Emergency Stop Button

Question 12

located at the top and bottom newels, it will start, stop and reverse the stairway movement.

Answer 12

Key Operated Control Switches

Question 13

Escalator Arrangement

Answer 13

1. Parallel (No Walkaround)
2. Parallel (With Walkaround)
3. Crisscross

Question 14

Grouping of Lifts
The lifts should be positioned to:
Minimize the walking distance between cars and hence the time taken to load passengers which will then improve overall quality of service.

For a two lift group: side by side positioning is the most efficient but also the option having the lifts positioned opposite one another is also an efficient arrangement.

Answer 14

TRUE

Question 15

Basic Regulations of Choice the kind of Vertical Communication are:

Number of Storey.
Distance between floors.
Intensive use of elevator in each floor. Location of the building.
Number of users in rush hours. Services in the building.

Answer 15

True

Question 16

Characteristics controls designing elevator are:

•	Speed of the Elevator.
•	Dimensions of the car Loads
•	Number of elevators.
•	Location of entrances in the building. 
   •      Location of the elevator area.

Answer 16

True

Question 17

Elevators Types
There are three main applications for lifts namely : Passenger, Goods and Service

Answer 17

Residential
Commercial
Freight Elevators
Bed Elevators
Panoramic Elevators
Library Elevators
Food Elevators

Question 18

If your building has more than G + 5 floors you will probably want to consider an electric traction elevator. These elevators are better suited for taller buildings, since they are capable of much greater speeds and heights.

Answer 18

Passenger Elevator (Traction)

Question 19

These elevators are used frequently and have a vast range of applications. Small buildings under G + 5 floors are typically where hydraulic units are found. BLANK units are limited by the number of floors that they can serve.

Answer 19

Hydraulic elevators

Question 20

These are passenger elevators but the cabin interior sizes are specially designed to allow stretchers to fit comfortably. Besides this, exceptionally smooth travel, exact matching with landing levels & minimum down-times are some of the features which classifies it as a BLANK

Answer 20

Hospital Elevators

Question 21

Operation types of the Lifts :

Answer 21

I. Traction Lift
II. Hydraulic Lift

Question 22

Drive Unit:

Answer 22

Electro Mechanical Drive
Hydraulic Drive.

Question 23

This lift works by the action of a pumped fluid, normally oil. Within a cylinder driving a piston which-is attached to the lift car.

Answer 23

Hydraulic Lifts

Question 24

The hydraulic lift is used in applications where the maximum travel distance is about BLANK meter.

Answer 24

20 m

Question 25

The maximum traveling speed of commercially available hydraulic lifts is limited to about

Answer 25

0.75 m/s

Question 26

This type of lift is suited to low intensity usage and is limited to around a maximum of 50 starts per hour.

Answer 26

Hydraulic Lift

Question 27

This type of lift is driven by Wire ropes passing over a driving wheel or sheave and connected to the lift car and a counterweight. The speed of these lifts can range from 0.5 m/s up to a maximum of 10 m/s.

Answer 27

Traction Lifts

Question 28

Basic Lift Components

Answer 28

Entrances Brakes Lift Cars Indicators Guides Counterweights Shaft Lift motor room

Question 29

Elevator Consist of: • Gear (with speed 0.62-2.5m/s). • Gearless (with speed 2.5-12m/s). • Control Board. • Doors: (manual-half-automatic-full auto.). Safety.

Answer 29

Gear (with speed 0.62-2.5m/s). Gearless (with speed 2.5-12m/s). Control Board. Doors: (manual-half-automatic-full auto.). Safety.

Question 30

Entrances: 1- Two Panel center opening : This is considered the most efficient door configuration as passengers can pass through the entrance before the doors are fully. 2- Four panel centre opening: This arrangement is used on entrances of 1400mm wide and above. 3- Two panel side opining: This method is more space efficient but slower for passenger transfer and is used , on non intensive applications.

Answer 30

TRUE

Question 31

Lift cars are made up of Two Main component parts : • The CAR itself and the SLING which holds the car. • The sling includes the guide shoes and safety gear.


Answer 31

TRUE

Question 32

The internal height within the car must be at least BLANK

Answer 32

1980 mm

Question 33

• On very high speed lifts the car requires special design to reduce noise levels and this is achieved by providing noise insulation to the car and streamlining the car to make the airflow around the car Smoother.

Answer 33

TRUE

Question 34

The sheave is connected to an electric motor.

Answer 34

Traction Lifts

Question 35

The sheave is connected to the electric motor When the motor turns one way, the sheave raises the elevator; when the motor turns the other way, the sheave lowers the elevator.

Answer 35

Traction Lifts

Question 36

In this elevator, the motor rotates the sheaves directly the motor turns a gear train that rotates the sheave.

Answer 36

Gear-less Elevator

Question 37

Typically, the BLANK, the BLANK and the BLANK are all housed in a machine room above the elevator shaft.

Answer 37

Sheave Motor Control System

Question 38

The BLANK weights about the same as the car filled to 40-percent capacity.

Answer 38

counterweight