ALE_Building Utilities Quiz 3

Of a partition, the number of decibels by which sound is reduced in transmission through

it; a measure of the sound insulation value of the partition, the higher the number,

the greater the insulation value.

• Acoustically

• Transmission Loss

• Sound Proof

This device, in escalators, stops the escalator automatically

if an abnormal current is supplied to the motor.

• Emergency Button Switch

• Limit Switches

• Current Overload Safety Switch

In elevator, these prevent the excessive car travel at the highest and lowest floor.

• Limit Switches

• Current Overload Safety Switch

• Breaker Switch

he number of cycles per unit time of a wave or oscillations expressed in hertz of cycles per second.

• Voltage

• Hertz

• Frequency

This device, in escalators, is provided at the drive unit location to protect against accidental movement of the escalator during inspection of the drives or during general maintenance.

• Emergency Stop

• Safety Gear Drive

• Mechanical Maintenance Locking Device

In elevator, it protects the equipment from over current.

• Panel Board

• Safety Switch

• Circuit Breaker

In elevator, it detects the obstacles during the door closing, and reopens the door if there is something. Photocell can be used together with this.

• Safety Shoe

• Safety Gear

• Safety Switch

• Safety Detector

Color code for pipes containing acid.

• Red

• Black

• Yellow

• Green

This type of perimeter detector detects a change in capacitance

of the area covered, caused by intrusion.

• Motion Detector

• Sensor Switch

• Proximity / Capacitance

The interior bottom surface of a pipe.

• Underside

• Invert

• Edge