NAMA Machine Technology & Telemetry 2

Question 1

What does DEX (Data Exchange) protocol enable in vending machine telemetry?

Accepted Answer

Standardized electronic data transfer between machines and collection devices

Answer

DEX is an industry-standard protocol that enables standardized electronic data transfer between vending machines and handheld collection devices or back-office systems.

Question 2

A vending machine's coin mechanism repeatedly rejects valid quarters. The FIRST diagnostic step should be:

Accepted Answer

Clean the coin path and check for debris or worn sensors

Answer

Cleaning the coin path and checking for debris or worn sensors is the first diagnostic step before considering part replacement.

Question 3

In vending machine refrigeration, what is the purpose of a capillary tube?

Accepted Answer

To meter refrigerant flow from the condenser to the evaporator

Answer

A capillary tube meters refrigerant flow from the high-pressure condenser side to the low-pressure evaporator side, acting as an expansion device.

Question 4

Which telemetry alert would indicate a potential health/safety issue in a refrigerated vending machine?

Accepted Answer

Cabinet temperature exceeding 41°F for more than 4 hours

Answer

A cabinet temperature exceeding 41°F for extended periods indicates food safety risk, as perishable products must be kept at or below 41°F.

Question 5

What is the function of a vending machine's MDB (Multi-Drop Bus) interface?

Accepted Answer

Provides a communication bus between the main controller and peripheral devices like validators and changers

Answer

MDB is a communication protocol/bus that connects the vending machine's main controller to peripheral devices such as bill validators, coin changers, and cashless readers.

(NAMA) National Automatic Merchandising Association Certification Practice Test

(NAMA) National Automatic Merchandising Association Certification Practice Test

NAMA Machine Technology & Telemetry 2