3rd Class Power Engineering (3A1) Practice Exam

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• What is the purpose of a boiler in a power plant?
• How do you convert Rankine to Kelvin?
• What is the lowest possible temperature on the Kelvin scale?
• A material with high thermal conductivity will:
• What are reaction forces primarily responsible for in a beam?
• What is the term for heat that causes a change in state without a change in temperature?
• When testing for ultimate tensile strength, why is cross-sectional area important?
• How is temperature defined in terms of molecular activity?
• What phenomenon describes heat transfer through fluids such as gases or liquids?
• How can the boiling point of a liquid be decreased?
• Strain is defined as the change in length of an object divided by its original length. True or False?
• What law states that the stress in an elastic body is directly proportional to the strain within the elastic limit?
• An I-beam is found to be 0.023 mm shorter than its original length under compressive load. What can be determined from this information?
• Which method of heat transfer occurs in liquids or gases due to density differences?
• What describes the moment of a force?
• How is strain defined in the context of mechanics?
• What unit is heat measured in?
• The amount of saturated water in a unit quantity of steam is indicated by which term?
• If a wire with weights is placed over a block of ice, what will happen?
• The mass of evaporated water required to produce dry saturated steam at specified conditions is defined as what?
• What is the amount of energy required to raise the temperature of one kg of a substance by one °C called?
• How many equilibrants does a system contain?
• Gases such as air, nitrogen and oxygen can be roughly defined as perfect gases because they:
• Is it true that each material has a coefficient value applied to expansion calculations?
• Which of the following statements reflects the principle of Hooke's Law?
• In the calculation of a constant temperature process the:
• The formula for strain is change in length divided by original length. What does this measure?
• What area is considered for calculations in an ultimate tensile strength test?
• What does trigonometry study?
• The internal resistance to an external force applied to a body is known as:
• Linear strain equals which of the following?
• The temperature at which water boils is directly influenced by which parameter?
• A material under tensile stress undergoes a sudden increase in length when forced beyond its yield point. Is this statement true?
• In engineering terms, what is another name for the modulus of elasticity (E)?
• What is known as the measurable degree of hotness or coldness of anything?
• Ultimate tensile strength designed into an object must be:
• Which temperature scale is the most commonly used?
• Which property is directly related to a material's ability to withstand deformation?
• Which factor influences the yield point of a material?
• How is the factor of safety defined?
• When measuring angles, how many degrees is one radian equal to?
• The unit for pressure specified by the Canadian Metric Practice Guide is?
• The relationship between static friction and kinetic friction is as follows:
• Which material has the lowest thermal conductivity?
• The Second Law of Thermodynamics deals with:
• What is the term for motion in a straight line?
• For a lever to maintain equilibrium, which condition must be satisfied?
• If a material subjected to a compressive load changes shape but returns to its original shape after the load is removed, does this indicate that the ultimate tensile strength was not reached?
• Boyle's Law applies to which type of process?
• A load exerted upon rivets will produce a stress type classed as:
• How is the ultimate stress of a material calculated?
• What is another name for the modulus of elasticity (E)?
• The various types of stress measured in the study of applied mechanics are:
• Which property does ultimate tensile strength directly relate to?
• The ratio of the heat energy required to make steam to the heat energy supplied by the combustion of fuel in a boiler is called what?
• Superheated steam is defined as steam that is above which temperature?
• Can the formula for stress be rearranged to find the area by utilizing stress multiplied by the load?
• Which term refers to the change in the position of a body relative to a reference point?
• The ratio of the output force to the input force is referred to as?
• What is the dryness fraction also known as?
• What is the purpose of the factor of safety in engineering?
• What does velocity refer to?
• If a sample is tested for maximum load, which of the following statements is true regarding its ultimate tensile strength?
• If a material exhibits elastic behavior under load, what does it indicate?
• The bending moment at any section of a beam is the algebraic sum of which forces?
• How do most liquids, excluding water, behave to temperature change when heated?
• If a bar is heated at one end and the heat travels until the other end is hot, this process is known as:
• If enough heat is supplied to convert a substance from a solid to a liquid, what force is overcome?
• Which type of triangle's area calculation is unique due to its properties?
• A trapezoid has which defining feature?
• The transfer of heat by convection involves the:
• Which conditions must be met for the equilibrium of beams?
• The quantity which describes the rate and the direction of motion is:
• Into how many components can a single vector be resolved?
• To find the load when stress and area are known, we must:
• What is the term for when a solid changes directly to a gaseous state?
• What effect does a load carried by a beam produce?
• The three methods by which transfer of heat energy takes place is:
• Which aspect is NOT a component of Young's Modulus?
• Heat will flow from a hot substance to a colder substance unaided, but it is impossible for heat to flow from a cold substance to a hotter one without the aid of mechanical work is:
• Which statement is true about radiant energy waves?
• Which of the following is NOT a method of heat transfer?
• Specific Gravity in the Imperial system is equivalent to what in the metric system?
• As the sine of an angle decreases, what happens to the angle?
• Heat transfer directly from a flame in a furnace to the furnace water walls is an example of:
• The boiling point of water depends on which of the following?
• According to industry standards, how is the factor of safety for new and used boilers determined?
• If the volume of a confined gas is constant, then the absolute pressure is:
• What happens when sensible heat is added to a substance?
• What is one method to determine the area of a trapezium?
• When the coefficient of friction increases, and the force between the two surfaces remains constant, the friction force will:
• What constitutes the shear force at any section or point in a beam?
• Transfer of heat by convection depends upon:
• What term describes any four-sided plane figure with straight sides?
• A boiler of higher capacity will always result in a higher equivalent evaporation. True or False?
• At absolute zero, what happens to molecular vibrational motion?
• What does Hooke's Law determine regarding the relationship of a body?
• Is distance a scalar quantity?
• During an ultimate tensile test, when does the test conclude?
• If given the load and area of an object, how do we find the stress?
• One of the conditions of a force system in equilibrium is:
• An expansion or compression which occurs without heat transfer to or from the gas is:
• In a right angle triangle with a constant angle, what happens to the ratio of the sides and hypotenuse?
• The rate of heat flow by conduction depends on temperature difference and what other factor?
• According to Hooke's Law, when is stress in an elastic body proportional to strain?
• What happens to a body's energy when heat is applied to it?
• Velocity ratio in a mechanical context is defined as:
• Speed is known as the ______________________.
• Hooke's Law is primarily used to define which property of a material?
• When conducting an ultimate tensile strength test, which area is used for calculation?
• The heat needed to turn a unit mass of liquid into vapor without changing its temperature is known as what?
• Specific weight is defined as?
• What is the boiling point on the Kelvin scale?
• What does the term 'allowable working stress' refer to?
• In the formula of the general gas law, for a given mass of gas where PV = mRT, r is:
• One of the conditions that a force system is in equilibrium is:
• If the velocity of a body is decreasing with time, how is it described?
• What does the ultimate strength of a material correspond to?
• What type of heat transfer occurs without the need for a medium?
• The turning effect of a force about a point is the _______ moment of a force.
• What is the ratio of stress to the corresponding strain known as?
• What does the term 'mechanical advantage' refer to in a simple machine?
• What is the term for the amount of deformation that occurs when a material is stressed beyond the proportional limit?
• The modulus of elasticity is typically expressed in which unit?
• What is the scientific or absolute scale of temperature?
• Kinetic friction is always less than:
• Which formula combines the Laws of Boyle and Charles?
• What occurs when enough heat is supplied to convert a solid to a liquid state?
• Which types of expansions or compressions are represented by pressure-volume diagrams?
• What is the term for heat transfer due to the movement of a fluid?
• In beam loading scenarios, what is shear force primarily associated with?
• When referring to stress as used in applied mechanics, the value is usually expressed in:
• If a beam is free to move on its supports with no additional forces, what type of support does it have?
• What is a key property of an equilibrant vector?
• A rhombus is a type of rhomboid that has:
• Which of the following methods is not a way of transferring heat energy?
• If a body is in equilibrium, the resultant of all forces acting upon the body must be zero. Is this statement true or false?
• Which type of stress is established when a beam carries a concentrated load?
• What is the relationship between stress and strain as per Hooke's Law?
• The area of any triangle can be found by knowing which of the following combinations?
• What distinguishes a vector from a scalar?
• The elastic limit is indicated by the point at which elongation:
• In a fluid contained by solid boundaries, the pressure exerted by the fluid is always?
• What important quantity allows for calculating the amount of stretching produced by a given stress?
• What is the boiling point on the Rankine scale?
• What is indicated when the ultimate tensile strength of a material is higher than its yield strength?
• What happens to the safety factor value if the operating temperature of a vessel operating at maximum allowable working stress is increased?
• How is the safety factor calculated if the safe working stress and ultimate strength are known?
• Which of the following are considered standards for measurement?
• What type of force must be applied to produce linear strain?
• A simple beam is defined by how it is supported. How is a simple beam characterized?
• Which type of stress is associated with forces that attempt to shorten or compress an object?
• A polygon is defined as a figure bounded by:
• Any vector may be considered to be composed of which other vectors?
• What is the correct description of displacement?
• The Kelvin scale is primarily used in which type of calculations?
• The amount of increase in area of each surface will depend on the:
• Which of the following is NOT a method of determining the area of a circle?
• What effect does increasing pressure have on the boiling point of water?
• What is the unit of relative density?
• Heat transfer by electromagnetic waves is referred to as:
• Which phenomenon involves heat transfer between stationary bodies in direct contact?
• The value corresponding to a temperature of 374.12°C and pressure of 22,090 kPa is called the what?
• If the absolute pressure of a confined gas is constant, then the volume is:
• Which process is important for heat loss in buildings during winter?
• Superheated steam is characterized by which of the following?
• What are the three ratios of a triangle?
• Temperature is defined as:
• What is one radian defined as?
• The ratio between the ultimate strength of a material and its safe working stress is known as what?
• When the sum of the clockwise moments equals the anti-clockwise moments, what condition is achieved?
• What is the temperature range of a mercury thermometer with a Celsius scale?
• What type of stress is produced when a load is exerted upon rivets?
• The temperature of a body is a measure of the ______________ _________________________.
• What vector concept requires a directional indication?
• An example of compression stress would be a load suspended from a rod. True or False?
• True or False: Unlike water, a typical gas may have an infinite number of different specific heat values.
• How is acceleration best defined?
• What is the correct definition of the ultimate strength of a material?
• What is heat transfer due to the movement of a fluid called?
• When a bolt stretches under a load, the ratio of the amount it stretches to its original length is called what?
• How is the moment of a force about a point calculated?
• A rhomboid has which of the following characteristics?
• Is the factor of safety a ratio between the ultimate strength of a material and its safe working stress?
• What is the relationship between actual mechanical advantage and velocity ratio?
• To increase the frictional force, it is necessary to:
• Are breaking load and maximum load the same thing?
• If the volume of a confined gas is constant then the absolute pressure is directly proportional to the absolute temperature according to:
• True or False: Ductility refers to a material's ability to deform under tensile stress.
• Convection is primarily dependent on:
• What is the relationship between the moment of a force and the distance involved?
• Is the ultimate strength of a material reached at the yield point?
• How can strain be defined in the context of material science?
• The coefficient of volumetric expansion for solids is defined as:
• How can the total heat for wet steam be determined?
• Which of the following statements is true about elastic limit?
• During the change of state from liquid to vapor at constant pressure, what type of heat is involved?
• Under what conditions can a material be subjected to stress without deforming permanently?
• How are the sides of a rhombus defined?
• What is the maximum stress produced during the fracture of a material called?
• The coefficient of linear expansion is defined as:
• Is it true that the elastic limits of a material is reached before a force stresses that material beyond its yield point?
• What are "standard conditions" when comparing mass densities of substances?
• What is the force called that is equal in magnitude but opposite in direction to the resultant force?
• The reference point used for gauge pressure is?
• The "relative density" of a substance refers to what?
• Which formula can be used to calculate the area of a triangle when given the lengths of all three sides?
• How is safe working stress determined?
• The main driving force for heat transfer is:
• What term describes the internal resistance or force of a body?
• What is the term for the ratio of equivalent evaporation to the actual steam flow rate?
• The concept of 'factor of safety' is primarily concerned with what aspect of material use?
• Conduction of heat takes place:
• What defines the change in length per unit length per degree rise in temperature?
• Which of the following is NOT a state of steam?
• Which statement best describes a perfectly elastic material?
• What occurs at the yield point of a material?
• What law states that the stress in an elastic body is directly proportional to the strain?
• What types of stress are set up in a simply supported beam carrying a concentrated load?
• How is average velocity determined?
• What defines a trapezium in terms of its sides?
• According to Hooke's Law, when is stress directly proportional to strain in an elastic body?
• How is the factor of safety expressed?
• What is the term used for a single vector that is equivalent to a system of several vectors?
• Which process involves the transfer of heat through direct contact?
• A body can be put into equilibrium by applying a force equal in magnitude but opposite in direction to the:
• In physics, what is the resultant vector?
• Ultimate strength of a material is expressed in which of the following units?
• The magnitude of the moment of a force is calculated by which formula?
• What is steam at its boiling point with no water particles present referred to as?
• As the cosine of an angle decreases, what happens to the value of the angle?
• What can be calculated if Young's Modulus and the stress on a body are known?
• The amount of deformation compared to the original size is known as?
• Force of friction always:
• What concept describes the energy required to raise the temperature of a unit mass by one degree Celsius?
• In a closed system where no heat is lost or gained, what equals the heat lost by the hotter substance?
• What is a defining characteristic of plane figures?
• What is the total amount of heat absorbed by the water/steam in a boiler over time called?
• The ratio of shear stress to shear strain is known as what?
• The amount of deformation compared to the original size of a body is referred to as what in applied mechanics?
• Are the units of velocity the same as the units of speed?
• How can we calculate the ultimate tensile strength if we have the maximum load and cross-sectional area of a sample?
• The proportionality of stress to strain is expressed as what?
• What is the correct term for the change of phase from a liquid to a vapor?
• Energy a body acquires when in motion is referred to as?
• Which material will conduct heat the best among the following options?
• The characteristic constant for a gas is given as:
• Which term refers to the energy content associated with phase changes?
• From the definition, the result of a force moving through a distance is:
• Which property of a material does NOT describe its behavior under load?
• To bring a body into equilibrium, an additional force must be applied equal in magnitude but opposite in direction to the:
• What is the heat required to change a unit mass of a liquid to vapor without temperature change called?
• Distance is:
• What is the formula for finding the final velocity of a falling body when acceleration due to gravity is known?
• What is a plane figure?
• How is safe working stress determined?
• How is the efficiency of any apparatus calculated?
• What is the yield point of a material?
• Absolute pressure must always be?
• What happens to heat when it flows from a hotter object to a colder object?
• Analytical solutions for mechanical problems involve the use of:
• When the maximum allowable working stress of a pressure vessel is adjusted, how does it affect the vessel design?
• When calculating the ultimate strength of a material, what should be done with the maximum load?
• A sector of a circle is bounded by two radius lines and a portion of the circumference known as a/an:
• What does Hooke's Law state?
• Is the thermal conductivity a property that varies for different materials?
• Which of the following methods can be used to find the stress in a steel block subjected to a tensile force?
• Which temperature scales are used in the SI system?
• What effect does an unbalanced moment have on a beam in equilibrium?
• Expansion will result in an increase in a body's surface as well as its ________________.
• Heat will always flow between two bodies if they are ___________________.
• What do the terms "compression stress" and "tension stress" refer to in beam analysis?
• What happens to the pressure of a gas if its volume is decreased while temperature remains constant?
• Radiation refers to:
• What is the unit of mass density commonly referred to as?