Book 1: 6-19 - Introduction to Thermoil Heaters & Systems

Question 1

Clean steam may be used in:

Select one:

A. Oil refineries
B. Steam cleaning
C. Humidification systems
D. Gas plants
E. Chemical processes

Answer 1

C. Humidification systems

Question 2

HRSG is the acronym for:

Select one:

A. High recovery system grader
B. Hot recovery system generator
C. Heat recovery steam generator
D. Hot radiation steam generator
E. Heavy radiation steam grader

Answer 2

C. Heat recovery steam generator

Question 3

Clean steam may be used in:

Select one:

A. Oil refineries
B. Chemical processes
C. Gas plants
D. Steam cleaning
E. Sterilization systems

Answer 3

E. Sterilization systems

Question 4

Hot oil circulating pumps:

Select one:

A. Love type pumps
B. Must be capable of temperatures above 500°C (932°F)
C. Need not be kept hot if on standby
D. Are positive displacement units
E. Are usually single stage centrifugal units

Answer 4

E. Are usually single stage centrifugal units

Question 5

A hot oil heating system is similar in principle to:

Select one:

A: A fire tube boiler burner
B. An oil refinery
C. A condensate return system
D. A steam heating system
E. A hot water heating system

Answer 5

E. A hot water heating system

Question 6

On the fuel gas system to a hot oil heater, the acronym, PRV, stands for:

Select one:

A. Primary regulating valve
B. Primary relief valve
C. Pressure restricting valve
D. Pressure regulating valve
E. Pressure relief valve

Answer 6

D. Pressure regulating valve

Question 7

Oils intended for use as heat transfer fluid in a hot oil system should:

Select one:

A. Resist thermal breakdown at low operating temperatures
B. Have a high viscosity
C. Posses low heat transfer characteristics
D. Be non-corrosive to metals used in the system
E. Have a high vapour pressure at operating temperature

Answer 7

D. Be non-corrosive to metals used in the system

Question 8

Oils intended for use as heat transfer fluid in a hot oil system should:

Select one:

A. Have a high vapour pressure at operating temperature
B. Be corrosive to metals used in the system
C. Have a low viscosity
D. Possess low heat transfer characteristics
E. Resist thermal breakdown at low operating temperatures

Answer 8

C. Have a low viscosity

Question 9

Flanges used in hot oil systems should be raised face and suitable _____ gaskets should be used.

Select one:

A. Metallic
B. Cork
C. Garlock
D. Graphite/asbestos
E. Rubber

Answer 9

A. Metallic

Question 10

While the hot oil heater refractory is being dried out the oil circulating in the tubes should be limited to a temperature of not more than ______ per hour.

Select one:

A. 35°C
B. 30°C
C. 55°C
D. 25°C
E. 60°C

Answer 10

C. 55°C

Question 11

Radiant type oil heaters for a hot oil system have:
Select one:

A. Combustion gases flowing insides tubes
B. Tubes containing fins on their inner surfaces
C. Mechanical draft combustion systems
D. Efficiencies of about 40 to 50%
E. An efficiency of about 75 to 85%

Answer 11

D. Efficiencies of about 40 to 50%

Question 12

A _______ surrounds the foundation to prevent hot oil from spreading beyond the immediate confines of the heater in the event of a tube rupture.
Select one:

A. Wooden dyke
B. Moat
C. Earthen wall
D. Steel wall
E. Concrete dike

Answer 12

E. Concrete dike

Question 13

Piping for hot oil systems 25.4 mm (1 in) in diameter, or smaller, should be_____ with screwed connections.

Select one:

A. Double extra strong
B. Schedule 80
C. Schedule 160
D. Schedule 40
E. Strong

Answer 13

B. Schedule 80

Question 14

The major components of a typical hot oil system include the furnace, pump, control devices and the:

Select one:
A. Surge tank
B. Stack damper
C. Containment dyke
D. Relief valve
E. Gas blanket

Answer 14

A. Surge tank

Question 15

With reference to hot oil systems the acronym FCV stands for:

Select one:
A. Fuel cutoff valve
B. Fuel control valve
C. Full cascade valve
D. Flow control valve
E. Flow control valve

Answer 15

D. Flow control valve

Question 16

One of the weaknesses of the gas turbine is its:

Select one:
A. Reciprocating motion
B. Thermal efficiency
C. Weight to power ratio
D. Startup time
E. Heavy weight

Answer 16

B. Thermal efficiency

Question 17

The refractory brick of the hot oil heater should be inspected for:

Select one:
A. Consistency
B. Abnormal cracks
C. Density
D. Hardness
E. Colour

Answer 17

B. Abnormal cracks

Question 18

Depending upon the size of the hot oil heater, it may have anywhere from 2 to ______ burners.

Select one:
A. 10
B. 20
C. 25
D. 15
E. 30

Answer 18

B. 20

Question 19

Convection type oil heaters for a hot oil system have:

Select one:
A. Tubes containing fins on their inner surfaces
B. Mechanical draft combustion systems
C. Efficiencies of about 40 to 50%
D. An efficiency of about 75 to 85%
E. Combustion gases flowing insides tubes

Answer 19

D. An efficiency of about 75% to 85%

Question 20

The type of hot oil system heater which is most efficient is the:

Select one:
A. Combined conduction and radiation
B. Combined conduction and convection
C. Convection
D. Combined radiation and convection
E. Radiant

Answer 20

D. Combined radiation and convection