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BLDG2011-Building Services (T2, 2025)

BLDG2011-Building Services (T2, 2025)

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What is the major difference between geared elevator and gearless elevator?

Gearless elevator has one speed only.

There is no gearbox with gearless elevator.

Geared elevator can transport more passengers.

Gearless elevator is cheaper than geared elevator.

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Referring to the figure below, which is the incorrect description of geared traction elevator?

Geared traction elevator

There is additional maintenance required for the gearbox.

Geared elevators control the movement of elevator cars by rolling steel hoist ropes over a drive sheave which is attached to a gearbox driven by a motor.

It might make some noise due to gearbox and speed changing.

Geared elevator has the highest car speed of all traction types.

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All the following statements about escalator are correct EXCEPT:

It is installed at an angle rather than a vertical elevator.

The controller of escalator is inside the bottom section of the entire system.

The escalator transports people between the floors of a building via moving stair treads.

Most escalators operate at a fairly slow constant speed to allow people to enter and leave with safety

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Which is the incorrect description for double-deck elevator?

It is an elevator system with two parallelly connected cars.

It increases the efficiency of delivery as well as reduces passenger waiting time.

The application of double-deck elevator reduces the need for elevator shaft space.

It is an elevator system with two vertically stacked cars.

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All the following statements about hole-less hydraulic lift are correct EXCEPT:

It is a lift system that uses pistons mounted inside the hoist way to raise and lower the car.

Hole-less hydraulic lifts do not need the piston.

Hole-less hydraulic lifts do not require excavation to accommodate the piston.

Hole-less hydraulic lift is intended for light duty and limited travel.

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What is the major difference between in-ground hydraulic lift and hole-less hydraulic lift?

The hole-less hydraulic lift is faster than in-ground hydraulic lift.

The hole-less hydraulic lift does not require excavation to accommodate the piston.

The hole-less hydraulic lift is more economical.

Only the in-ground hydraulic lift uses piston.

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What are the correct names of the following types of lift systems from (A) – (C)?

Lift A

(A)

Lift B

(B)

Lift C

(C)

Hole-less hydraulic lift, In-ground hydraulic lift, Freight lift

In-ground hydraulic lift, Freight lift, Hole-less hydraulic lift

In-ground hydraulic lift, Hole-less hydraulic lift, Freight lift

Hole-less hydraulic lift, Freight lift, In-ground hydraulic lift

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All the following statements about the quality of a lift system’s performance are correct EXCEPT:

The quality of a lift’s service and system performance depends on waiting interval (WI) and 5-minute handling capacity (HC or HC5)

The WI is the minimum time (in seconds) between initiating a call in the main lobby during peak traffic conditions and the descend/ascend of the lift to the lobby.

The overall quality of a passenger lift installation is judged by the smoothness of the ride, the degree of noise, and the accuracy of floor levelling.

The HC/HC5 represents the percentage of the total building population which can be transported into a building over a five-minute period.

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Which is not correct for traffic analysis of a building lift system?

The early morning up-pick demand is the basis for lift selection for office buildings.

The traffic pattern will be same for all commercial buildings such as hotels, hospitals and office buildings.

Some improvements in the performance or capacity of an existing lift system can be achieved by modernising the control system and increasing motor speed.

The carrying capacity of a lift system must match the expected demand for transportation based on design criteria consistent with the building’s operation.

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All the following statements about the engineering principles of vertical transport systems are correct EXCEPT:

Vertical transport systems, including passenger and good lifts, escalators and moving walks are intended to move people and goods vertically between floors in multi-level buildings.

Lift design considerations include the speed of transportation and the comfort of acceleration.

Vertical transport items represent a major capital cost for the building.

Lifts are mandatory in all buildings over 10 m.

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