Power Engineering 4th Class B 12
Chapter 1| Questions And Full Set
Correct Solutions | 2026 Update
A control room operator notices that the stack temperature of the hot oil
heater is increasing rapidly. The operator should:
Choose one answer.
a. Activate the emergency shutdown
b. Call the shift boss on the intercom
c. Send an operator out to see if there is smoke coming from the oil heater
stack
d. Wait to see if the temperature will come down again
e. Alert the fire department - Ans--a
The preferred material for construction of hot oil systems is:
Choose one answer.
a. Nickel
b. Stainless steel
c. Non-ferrous
d. Cast iron
e. Carbon steel - Ans--e
Coking of the oil in hot oil heater tubes will begin to occur if:
Choose one answer.
a. The oil becomes too thick
b. There is too much water in the oil
c. The oil temperature becomes excessively high
d. The oil flow becomes excessively high
e. The surge tank level becomes low - Ans--c
The presence of coke deposits in a hot oil heater tube can be confirmed by:
Choose one answer.
a. Attempting to roll a ball through the suspected bad tube
, b. Rattling the tube mechanically and blowing out the deposit with air
c. Using ultrasound equipment
d. Radiographic inspection
e. Conducting a hydrostatic test - Ans--d
_____ are required to prevent oil from spreading beyond the confines of a
heater in the event of a ruptured tube.
Choose one answer.
a. Moats
b. Dikes
c. Tunnels
d. Rails
e. By-pass pipes - Ans--b
A high flash point in oil reduces the risk of:
Choose one answer.
a. Pump cavitation
b. Condensation
c. Vapour bubble formation
d. Heat transfer
e. Fire - Ans--e
When petroleum oils break down or crack due to high temperature, the
products formed are insoluble and:
Choose one answer.
a. More viscous
b. Less viscous
c. Highly flammable
d. Corrosive
e. Possess good heat transfer characteristics - Ans--a
The temperature of the oil in a fired oil heater is controlled by:
Choose one answer.
a. Increasing the oil flow
b. Decreasing the gas flow alone
c. Varying the firing rate
d. Decreasing the air, flow alone
Chapter 1| Questions And Full Set
Correct Solutions | 2026 Update
A control room operator notices that the stack temperature of the hot oil
heater is increasing rapidly. The operator should:
Choose one answer.
a. Activate the emergency shutdown
b. Call the shift boss on the intercom
c. Send an operator out to see if there is smoke coming from the oil heater
stack
d. Wait to see if the temperature will come down again
e. Alert the fire department - Ans--a
The preferred material for construction of hot oil systems is:
Choose one answer.
a. Nickel
b. Stainless steel
c. Non-ferrous
d. Cast iron
e. Carbon steel - Ans--e
Coking of the oil in hot oil heater tubes will begin to occur if:
Choose one answer.
a. The oil becomes too thick
b. There is too much water in the oil
c. The oil temperature becomes excessively high
d. The oil flow becomes excessively high
e. The surge tank level becomes low - Ans--c
The presence of coke deposits in a hot oil heater tube can be confirmed by:
Choose one answer.
a. Attempting to roll a ball through the suspected bad tube
, b. Rattling the tube mechanically and blowing out the deposit with air
c. Using ultrasound equipment
d. Radiographic inspection
e. Conducting a hydrostatic test - Ans--d
_____ are required to prevent oil from spreading beyond the confines of a
heater in the event of a ruptured tube.
Choose one answer.
a. Moats
b. Dikes
c. Tunnels
d. Rails
e. By-pass pipes - Ans--b
A high flash point in oil reduces the risk of:
Choose one answer.
a. Pump cavitation
b. Condensation
c. Vapour bubble formation
d. Heat transfer
e. Fire - Ans--e
When petroleum oils break down or crack due to high temperature, the
products formed are insoluble and:
Choose one answer.
a. More viscous
b. Less viscous
c. Highly flammable
d. Corrosive
e. Possess good heat transfer characteristics - Ans--a
The temperature of the oil in a fired oil heater is controlled by:
Choose one answer.
a. Increasing the oil flow
b. Decreasing the gas flow alone
c. Varying the firing rate
d. Decreasing the air, flow alone
