Ergonomics: Risk Factors & Environment

Symptoms of depressions associated with short day time (e.g. winter time in the northern hemisphere) is known as

• Light-based Anomaly Disorder (LAD)
• Bio-rhythm Abnormality Disorder (BAD)
• Seasonal Affective Disorder (SAD)
• Melatonin Type-A Deficiency (MAD)

A uniform lighting that is pleasant to the eyes is achieved by installing

• a few standardised high-power light bulbs
• many low-power bulbs instead of a few high-power ones
• a mix of low-power and high-power light bulbs
• the light bulbs at an equal distances

Tags

NGSS.HS-ETS1-3

At 85dB(A), workers can be safely exposed to ___________ for up 8 hours per day.

• sound level
• unwanted sound
• noise dosage
• high frequency noise

How does a hand tool's vibration affect the hand grip?

• It does not affect at all
• It reduces the strength of the grip
• It increases the force of gripping
• It has an unpredictable effect of the grip strength

The difference between heat stress and thermal comfort is primarily about the

• range of body temperature involved
• reactions: either biological or subjective perception
• range of the ambiance temperature
• medical consequences to the heat exposure

Tags

NGSS.HS-PS3-4

The Borg Physical Exertion Scale measures physical work efforts by the

• amount of oxygen intake
• muscles’ electrical activities
• frequency of the pulse
• subjective self-report

Which of the following is TRUE?

• Deviation from the normal posture is an awkward posture
• An awkward posture does not necessarily involve deviation from the normal posture
• Static posture is the safest work posture
• An awkward posture CANNOT be a static posture

A uniform pace of work means

• A stable task frequency
• A varying task speed
• A cyclical task frequency
• A non-stop task performance

Contact stress, as an ergonomic risk factor, is associated with

• the amount of force used in performing a task
• the discomfort rising from interactions with co-workers
• subjective perception of task difficulties
• awkward posture in performing a task

Ergonomics assessment tools like WERA and REBA helps to

• identify the most stressful part of a task
• measure the user-friendliness of a task design
• assess the need for corrective actions to be taken towards a task
• monitor shifting risk levels in a task