The minimum temperature at which a hot water boiler should be operated to prevent flue gas condensation is ___C.

The minimum temperature at which a hot water boiler should be operated to prevent flue gas condensation is ___C.

a. 65
b. 77
c. 95
d. 88




Answer: B

An excessive rise in stack temperature can be caused by:

An excessive rise in stack temperature can be caused by:

a. Heavy scale build up
b. Too much cold air in the furnace
c. High solid content in the fuel
d. Over pressurization

Answer: A

Smoking conditions during the operation of a boiler can be caused by

Smoking conditions during the operation of a boiler can be caused by

a) improper air/fuel ratio
b) steam demands too great
c) low water conditions
d) too much combustion air
e) not enough fuel






Answer: A

It is recommended that the differential between the safety relief valve set pressure and the operating pressure of a hot water boiler be kept to a minimum of 69 kPa (10 psi) or __________ % of the relief valve setting.

It is recommended that the differential between the safety relief valve set pressure and the operating pressure of a hot water boiler be kept to a minimum of 69 kPa (10 psi) or __________ % of the relief valve setting.

a) 10
b) 15
c) 20
d) 25
e) 30






Answer: D

Thermal shock to boilers can be reduced by

Thermal shock to boilers can be reduced by

a) warming up boilers slowly
b) keeping the boiler free of scale build-up
c) covering the tube sheets with refractory
d) not allowing full flow of cold water into a warm hot water boiler
e) all of the above





Answer: E

The maximum pressure of a low pressure steam heating boiler is

The maximum pressure of a low pressure steam heating boiler is

a) 70 kPa
b) 103 kPa
c) 113 kPa
d) 207 kPa
e) 1104 kPa




Answer: B