ABSA 4B – 1 questions with accurate answers
_____ are installed to prevent hot oil from spreading beyond the
confines of a hot oil heater in the event of a ruptured tube.
Select one:
a. By-pass pipes
b. Ditches
c. Tunnels
d. Dikes Ans✓✓✓ d
___________ dampers are controlled in such a way that they are either
fully open or fully closed.
Select one:
a. Relief
b. Backdraft
c. Return air
d. Two-position Ans✓✓✓ d
A circulating pump, known as a cooling water pump,is usually: Select
one:
a. A small capacity pump
b. A once-through device
c. A reciprocating pump
d. Connected with some type of heat exchanger system Ans✓✓✓ d
,A closed cycle gas turbine: Select one:
a. Burns fuel with spent exhaust gas.
b. Recycles the same working fluid
c. Is the most common type of gas turbine
d. Does not need a combustion chambe Ans✓✓✓ b
A common cause of antifriction bearing failure is: Select one:
a. Shaft misalignment
b. Drive motor overload
c. Extreme cold temperature cracking
d. High RPM service Ans✓✓✓ a
A common plumbing trap has a water seal depth of: Select one:
a. The inside diameter of the pipe
b. The outside diameter of the pipe
c. 5 cm
d. 10 cm Ans✓✓✓ c
A control room operator notices that the stack temperature of a hot oil
heater is increasing rapidly. The operator should:
Select one:
a. Wait to see if the temperature returns to normal.
b. Send an operator out to see if there is smoke coming from the oil
heater stack.
,c. Call the shift charge engineer for advice.
d. Activate the emergency shutdown. Ans✓✓✓ d
A deep seal plumbing trap has a water seal depth of: Select one:
a. The inside diameter of the pipe
b. The outside diameter of the pipe
c. 5 cm
d. 10 cm Ans✓✓✓ d
A double-acting pump:
Select one:
a. Is a positive displacement pump
b. Has two slide valves
c. Has two pistons on the driver end
d. Has two pistons on the pump end Ans✓✓✓ a
A flame rod:
Select one:
a. Develops a high resistance in the presence of a flame.
b. Forms an electric circuit with the rod, flame and burner
c. Is used only for oil fired burners
d. Is used in combination with a photocell Ans✓✓✓ b
, A high stack temperature in a hot oil heater may indicate: Select one:
a. Inadequate combustion air
b. A tube failure
c. Excessive oil flow
d. Improper fuel-air ratio Ans✓✓✓ b
A low temperature catalytic heater contains a layer of: Select one:
a. A ceramic mat impregnated with a catalyst
b. Glass wool impregnated with a catalyst
c. Wool fiber impregnated with a catalyst
d. Metal impregnated with a ceramic material Ans✓✓✓ b
A material that is commonly used as a solid lubricant is: Select one:
a. Tallow
b. Lime
c. Molybdenum disulfide
d. Sodium carbonate Ans✓✓✓ c
A normal anti-friction bearing temperature operating range is: Select
one:
a. 80°C to 120°C
b. 20°C to 50°C
c. 65°C to 70°C
_____ are installed to prevent hot oil from spreading beyond the
confines of a hot oil heater in the event of a ruptured tube.
Select one:
a. By-pass pipes
b. Ditches
c. Tunnels
d. Dikes Ans✓✓✓ d
___________ dampers are controlled in such a way that they are either
fully open or fully closed.
Select one:
a. Relief
b. Backdraft
c. Return air
d. Two-position Ans✓✓✓ d
A circulating pump, known as a cooling water pump,is usually: Select
one:
a. A small capacity pump
b. A once-through device
c. A reciprocating pump
d. Connected with some type of heat exchanger system Ans✓✓✓ d
,A closed cycle gas turbine: Select one:
a. Burns fuel with spent exhaust gas.
b. Recycles the same working fluid
c. Is the most common type of gas turbine
d. Does not need a combustion chambe Ans✓✓✓ b
A common cause of antifriction bearing failure is: Select one:
a. Shaft misalignment
b. Drive motor overload
c. Extreme cold temperature cracking
d. High RPM service Ans✓✓✓ a
A common plumbing trap has a water seal depth of: Select one:
a. The inside diameter of the pipe
b. The outside diameter of the pipe
c. 5 cm
d. 10 cm Ans✓✓✓ c
A control room operator notices that the stack temperature of a hot oil
heater is increasing rapidly. The operator should:
Select one:
a. Wait to see if the temperature returns to normal.
b. Send an operator out to see if there is smoke coming from the oil
heater stack.
,c. Call the shift charge engineer for advice.
d. Activate the emergency shutdown. Ans✓✓✓ d
A deep seal plumbing trap has a water seal depth of: Select one:
a. The inside diameter of the pipe
b. The outside diameter of the pipe
c. 5 cm
d. 10 cm Ans✓✓✓ d
A double-acting pump:
Select one:
a. Is a positive displacement pump
b. Has two slide valves
c. Has two pistons on the driver end
d. Has two pistons on the pump end Ans✓✓✓ a
A flame rod:
Select one:
a. Develops a high resistance in the presence of a flame.
b. Forms an electric circuit with the rod, flame and burner
c. Is used only for oil fired burners
d. Is used in combination with a photocell Ans✓✓✓ b
, A high stack temperature in a hot oil heater may indicate: Select one:
a. Inadequate combustion air
b. A tube failure
c. Excessive oil flow
d. Improper fuel-air ratio Ans✓✓✓ b
A low temperature catalytic heater contains a layer of: Select one:
a. A ceramic mat impregnated with a catalyst
b. Glass wool impregnated with a catalyst
c. Wool fiber impregnated with a catalyst
d. Metal impregnated with a ceramic material Ans✓✓✓ b
A material that is commonly used as a solid lubricant is: Select one:
a. Tallow
b. Lime
c. Molybdenum disulfide
d. Sodium carbonate Ans✓✓✓ c
A normal anti-friction bearing temperature operating range is: Select
one:
a. 80°C to 120°C
b. 20°C to 50°C
c. 65°C to 70°C
