[ILM] 104E

Question 1

standard connection for two-pipe controller

Answer 1

supply - 20 psi
branch 0-20 psi

Question 2

the controllers mount on a wall in the centre of an air-conditioned zone and at or slightly below eye level

T or F

Answer 2

True

Question 3

standard connection for three-pipe controller

Answer 3

supply - 20 psi
branch 0-20 psi
sensor 3 - 15 psi

Question 4

three-pipe controllers are usually in a secure control cabinet that only trained technicians can access

T or F

Answer 4

True

Question 5

3 different BAS system designs are:

Answer 5

1. centralized supervisory control systems - oldest
2. centralized direct digital control systems
3. distributed direct digital control systems -newest

Question 6

analog output signals from the CPU to the actuator usually range from

Answer 6

0-20mA
0-5vdc
0-10vdc

Question 7

BAS networking

Answer 7

1. Lontalk
2. BACnet
3. Modbus

Question 8

pneumatic controller

Answer 8

requires 20 psig supply of clean, dry, oil-less air

outputs a signal range of between 3 - 15 psi

Question 9

Pressure Reducing Valve

Answer 9

reduce the high pressures in the compressor and receiver to the supply pressure that the pneumatic system components require.
The compressor provides 60-90 psi compressed air, whereas the pneumatic control components in commercial buildings require approx. 20 psi for proper operation

Question 10

zone valve

Answer 10

heating valves -> normally open (default)
cooling valves -> normally closed (default)

Question 11

BAS CPU controllers are often hidden or installed in a locked cabinet to prevent tampering

T or F

Answer 11

True

Question 12

fire alarm system has ultimate authority over all building automation functions

T or F

Answer 12

True