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Massachusetts Comprehensive Assessment System

2015, High School Technology/Engineering

Download PDF Document  Question 45: Open-Response  
The diagram below shows a circus tent in a permanent location. The tent is cooled using a passive ventilation system.
The diagram shows a circus tent with an entrance on the left and an exit on the right of the tent. To the left of the tent are a series of trees and shrubs that line both sides of the entrance to the tent. Between the two lines of trees and shrubs are three arrows pointing to the entrance of the tent that are labeled 'Wind'. On the right of the tent are two walls that line both sides of the exit from the tent. Between the two walls are three arrows pointing away from the exit of the tent that are labeled 'Wind'.
There is an entrance on the west side of the tent and an exit on the east side. During the months when the circus tent is used, the prevailing wind blows from west to east.
  1. Describe two benefits of using a passive ventilation system rather than a traditional air-conditioning system to cool the tent.
  1. Describe one function of the trees and shrubs on the west side of the tent in the passive system.
  1. Based on Bernoulli’s principle, describe what happens to the velocity and the pressure of the air at the entrance of the tent.

Scoring Guide and Sample Student Work
Select a score point in the table below to view the sample student response.

ScoreDescription
4 The response demonstrates a thorough understanding of Bernoulli’s principle and how environmental conditions influence the design of buildings. The response clearly describes two benefits of using a passive ventilation system rather than a traditional air-conditioning system to cool the tent, and describes one function of the trees and shrubs in this system. The response also clearly describes what happens to the velocity and the pressure of the air at the entrance of the tent.
4
3 The response demonstrates a general understanding of Bernoulli’s principle and how environmental conditions influence the design of buildings.
2 The response demonstrates a limited understanding of Bernoulli’s principle and how environmental conditions influence the design of buildings.
1 The response demonstrates a minimal understanding of Bernoulli’s principle and how environmental conditions influence the design of buildings.
0 The response is incorrect or contains some correct work that is irrelevant to the skill or concept being measured.

Note: There are 2 sample student responses for Score Point 4.

High School Technology/Engineering

Question 11: Fluid and Thermal Systems
Question 23: Electrical and Communication Systems
Question 33: Engineering Design
Question 44: Fluid and Thermal Systems
Question 45: Construction and Manufacturing

Return to the MCAS 2015 Student Work Directory



Last Updated: March 27, 2017
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