Power Engineering 4th Class B 12
chapter 1 Exam 20-25 Questions and
Answers
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 - CORRECT ANSWER✔️✔️-a
The preferred material for construction of hot oil systems is:
Choose one answer.
a. Nickel
b. Stainless steel
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1
,c. Non-ferrous
d. Cast iron
e. Carbon steel - CORRECT ANSWER✔️✔️-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 - CORRECT ANSWER✔️✔️-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 - CORRECT ANSWER✔️✔️-d
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 2
, _____ 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 - CORRECT ANSWER✔️✔️-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 - CORRECT ANSWER✔️✔️-e
When petroleum oils break down or crack due to high temperature, the products formed are
insoluble and:
Choose one answer.
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 3
chapter 1 Exam 20-25 Questions and
Answers
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 - CORRECT ANSWER✔️✔️-a
The preferred material for construction of hot oil systems is:
Choose one answer.
a. Nickel
b. Stainless steel
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 1
,c. Non-ferrous
d. Cast iron
e. Carbon steel - CORRECT ANSWER✔️✔️-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 - CORRECT ANSWER✔️✔️-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 - CORRECT ANSWER✔️✔️-d
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 2
, _____ 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 - CORRECT ANSWER✔️✔️-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 - CORRECT ANSWER✔️✔️-e
When petroleum oils break down or crack due to high temperature, the products formed are
insoluble and:
Choose one answer.
FOR STUDY PURPOSES ONLY COPYRIGHT © 2025 ALL RIGHTS RESERVED 3
