Question: QUESTION 5 The Figure below shows a start - up heater used in ammonia unit to start - up the process. For this system, the

QUESTION 5
The Figure below shows a start-up heater used in ammonia unit to start-up the process.
For this system, the following statements are true (select as many as appropriate).
a. All the pneumatic control valves have a failure mode close.
b. All the control valves have a failure mode open.
c. There is a burner switch in place linked to a hand switch and a solenoid valve.
d. The temperature of the hot gas is measured, whilst the fuel gas flowrate is manipulated.
e. There is a pressure control loop in place.
QUESTION 5 The Figure below shows a start-up heater used in

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