EMT Practice Test

1. Question Content...

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Question1: A new network storage device in a non-standard size rack of approximately 600 kg/1,300 lbs is going to be installed in the data center.
Are new floor loading calculations required?

Question2: The UPS of a data center, with an ANSI/TIA-942 Rating-4, is installed with the rectifier connected to power feed A and the bypass/reserve line input connected to power feed B.
To which feed will the output of the UPS be synchronized?

Question3: What is a significant difference between a halocarbon gas-based fire suppression system and an inert gas-based fire suppression system?

Question4: A 5kW (power consumption) server keeps crashing with the message 'temperature too high'.
The intake temperature is measured at 25 °C/77 °F and a relative humidity (RH) level of 50%.
The exhaust temperature is 29 °C/84 °F and 45% RH.
The raised floor is providing an adequate amount of CFM/CMH at a reasonable velocity.
The pressure under the raised floor is approximately 25 Pa/0.1 inch H₂O.
Analyze the situation and indicate what the most likely cause is for this server to crash.

Question5: Do you need to consider bullet (ballistics) protection when designing a data center?

Question6: The 'maximum exposed area' of the fire-rated glass is defined by the supplier as 3 sqm/32 sqft. The window area is 4 sqm/43 sqft.
What would be the best option?

Question7: What is the advantage or disadvantage of using MPO (Multi-fiber Push On)/pre-terminated fiber?

Question8: From the options indicated, what is the correct starting point for the raised floor installation?

Question9: In which stage of the data center life cycle does commissioning take place?

Question10: What is the main reason to install Earth Leakage protection?

Question11: The location of a data center is just above the Arctic Circle (North Pole). The outside air temperature is never above 21°C/70°F.
Taking energy efficiency as the highest priority, which cooling system should you recommend?

Question12: What is a potential disadvantage of using water mist as a fire extinguishing system?

Question13: You need to determine the strategy for the cooling audit. All the servers are based on a front-to-rear (F-R) airflow design.
Which location for the temperature/humidity measurement should you recommend for the audit?

Question14: Do you need to consider blast protection when designing a data center?

Question15: A data center requires an audit to find out whether it conforms with ANSI/TIA-942 Rated-3 (concurrently maintainable).
Will the network architecture be part of this audit?

Question16: When installing a raised floor, can we use a spirit level bar to level the floor?

Question17: What precaution shall be taken for cabling leading into an equipment rack when a data center is in a seismic-prone area?

Question18: What is the main disadvantage of using a ToR (Top of Rack) design?

Question19: The pipes of a VESDA smoke detection system are installed at the air intake of the air conditioner inside the computer room.
Is this a good practice from an early smoke detection point of view?

Question20: An air-conditioner unit needs to be selected. Two types are available:
Unit-A has a Sensible Heat Ratio (SHR) of 0.7.
Unit-B has a Sensible Heat Ratio (SHR) of 0.9.
From an efficiency point of view, which one should be selected?

Question21: You are allowed to use a calculator for this question. The total power consumption of the ICT equipment in a rack is 6 kW. The equipment is traditional ICT equipment with a Delta-T of approximately 11 °C / 20 °F. Calculate the approximate CFM required to cool the equipment in the rack.

Question22: You have three UPS systems connected in parallel. The UPS systems have an imbalance in the load sharing of approximately 20%.
What should you recommend?

Question23: When are the wet bulb and dry bulb temperatures identical?

Question24: The humidity in the computer room has changed from about 50% down to 35% Relative Humidity (RH).
What influence does this have on Electrostatic Discharge (ESD)?

Question25: A data center scores Rated-3 in mechanical, Rated-4 in electrical, and Rated-2 in architectural.
What is the overall Rating of this data center when the Rating is based on the ANSI/TIA-942?