Commercial Boiler Quizzes with
Complete Questions and Answers
The heat identified by only a change in temperature is known as
A. sensible heat
B. latent heat
C. total heat
D. residual heat - ANSWER-A
Mechanical energy in transition is referred to as
A. horsepower
B. work
C. heat
D. velocity - ANSWER-B
The heat required to change a substance from a solid to a liquid while at its freezing
temperature, is known as the latent heat of
A. fusion
B. vaporization
C. condensation
D. sublimation - ANSWER-A
Steam tables can be used to obtain the
A. values for properties of water and steam vapor at various conditions
B. specific fuel consumption under steady steaming conditions
C. steam generating capacity of a vessel boilers
D. mechanical efficiency of the main unit - ANSWER-A
Power is defined as the
,A. rate of doing work
B. amount of force needed to overcome friction
C. amount of work accomplished
D. distance through which an object is moved - ANSWER-A
Heat which brings about a change in the physical state of a substance without a
change in tempature, is called
A. specific heat
B. sensible heat
C. latent heat
D. ambient heat - ANSWER-C
The sum of the sensible heat and the latent heat of any substance is known as
A. total heat
B. residual heat
C. specific heat
D. superheat - ANSWER-A
A low pressure steam boiler has a MAWP of ______ psi
A. 75
B. 35
C. 10
D. 50 - ANSWER-C
A horizontal return tubular (HRT) boiler is a ______ boiler
A. firetube
B. watertube
C. scotch marine
D. none of the above - ANSWER-A
,Which of the following modes of heat transfer does NOT require any physical
contact between a warmer and a cooler substance?
A. radiation
B. conduction
C. natural convection
D. all of the above - ANSWER-A
Heat may be transferred in how many years?
A. one
B. two
C. three
D. four - ANSWER-C
When the boiler pressure exceeds________ psi, it is required that extra heavy pipe be
used on the blowoff system.
A. 15
B. 100
C. 125
D. 150 - ANSWER-C
The purpose of a feedwater regulator is to_______
A. shut down the boiler in the event of low water
B. prevent a furnace shutdown
C. control water level in the feedwater heater
D. maintain a constant water level in the boiler - ANSWER-D
To test the low water cutoff
A. the burner must be off
B. there must be no pressure on the boiler
C. the fuel must be shut off
, D. the burner must be firing - ANSWER-D
The heat required to raise the temperature of a unit mass of substance one degree
is called its
A. specific heat capacity
B. latent heat
C. entropy
D. adiabatic heat - ANSWER-A
Energy existing in a system as a result of the relative velocities of the objects is
defined as
A. potential energy
B. pressure energy
C. kinetic energy
D. relative energy - ANSWER-C
Some watertube boilers are equipped with _____ to increase the heating surface and
the life of the furnace refractory
A. stays
B. baffles
C. Brickwork
D. waterwalls - ANSWER-D
Watertube boilers were designed to operate at pressures as high as _____ psi, a
point known as the critical pressure of steam
A. 512
B. 5000
C. 1015
D. 3205 - ANSWER-B
Boiler tubes are manufactured using materials that meet______
Complete Questions and Answers
The heat identified by only a change in temperature is known as
A. sensible heat
B. latent heat
C. total heat
D. residual heat - ANSWER-A
Mechanical energy in transition is referred to as
A. horsepower
B. work
C. heat
D. velocity - ANSWER-B
The heat required to change a substance from a solid to a liquid while at its freezing
temperature, is known as the latent heat of
A. fusion
B. vaporization
C. condensation
D. sublimation - ANSWER-A
Steam tables can be used to obtain the
A. values for properties of water and steam vapor at various conditions
B. specific fuel consumption under steady steaming conditions
C. steam generating capacity of a vessel boilers
D. mechanical efficiency of the main unit - ANSWER-A
Power is defined as the
,A. rate of doing work
B. amount of force needed to overcome friction
C. amount of work accomplished
D. distance through which an object is moved - ANSWER-A
Heat which brings about a change in the physical state of a substance without a
change in tempature, is called
A. specific heat
B. sensible heat
C. latent heat
D. ambient heat - ANSWER-C
The sum of the sensible heat and the latent heat of any substance is known as
A. total heat
B. residual heat
C. specific heat
D. superheat - ANSWER-A
A low pressure steam boiler has a MAWP of ______ psi
A. 75
B. 35
C. 10
D. 50 - ANSWER-C
A horizontal return tubular (HRT) boiler is a ______ boiler
A. firetube
B. watertube
C. scotch marine
D. none of the above - ANSWER-A
,Which of the following modes of heat transfer does NOT require any physical
contact between a warmer and a cooler substance?
A. radiation
B. conduction
C. natural convection
D. all of the above - ANSWER-A
Heat may be transferred in how many years?
A. one
B. two
C. three
D. four - ANSWER-C
When the boiler pressure exceeds________ psi, it is required that extra heavy pipe be
used on the blowoff system.
A. 15
B. 100
C. 125
D. 150 - ANSWER-C
The purpose of a feedwater regulator is to_______
A. shut down the boiler in the event of low water
B. prevent a furnace shutdown
C. control water level in the feedwater heater
D. maintain a constant water level in the boiler - ANSWER-D
To test the low water cutoff
A. the burner must be off
B. there must be no pressure on the boiler
C. the fuel must be shut off
, D. the burner must be firing - ANSWER-D
The heat required to raise the temperature of a unit mass of substance one degree
is called its
A. specific heat capacity
B. latent heat
C. entropy
D. adiabatic heat - ANSWER-A
Energy existing in a system as a result of the relative velocities of the objects is
defined as
A. potential energy
B. pressure energy
C. kinetic energy
D. relative energy - ANSWER-C
Some watertube boilers are equipped with _____ to increase the heating surface and
the life of the furnace refractory
A. stays
B. baffles
C. Brickwork
D. waterwalls - ANSWER-D
Watertube boilers were designed to operate at pressures as high as _____ psi, a
point known as the critical pressure of steam
A. 512
B. 5000
C. 1015
D. 3205 - ANSWER-B
Boiler tubes are manufactured using materials that meet______
