Mechanics and Statistics MCQ

What is Newton's Third Law?

Answer

Correct Answer: Every action has an equal and opposite reaction.

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What does N /A stand for?

Answer

Correct Answer: Not available

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What is quantitative data?

Answer

Correct Answer: Numerical Data that can be discrete or continuous

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What is another name for quantitative data?

Answer

Correct Answer: Numerical Data

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What is qualitative data?

Answer

Correct Answer: Data that is descriptive and divided into categories.

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What is the Critical Region?

Answer

Correct Answer: The region outside the acceptable region.

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What is the first rule of Tree Diagrams?

Answer

Correct Answer: Write a probability on every branch

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What is the main purpose of a model?

Answer

Correct Answer: To make predictions

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What are dependent events?

Answer

Correct Answer: Events that influence each other

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What does extrapolation mean?

Answer

Correct Answer: Estimating a value outside the range of data that you have

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What does interpolation mean?

Answer

Correct Answer: Estimating a value within the range of data you have

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What is data cleaning?

Answer

Correct Answer: Identifying and removing invalid data points from a data set.

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What is the linear interpolation formula?

Answer

Correct Answer: Lower Bound + (Number into class - Number of previous classes) * Class Width/Class Frequency.

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What is the name of the sampling method that is used when the most conveniently available sampling units that meet required criteria are selected?

Answer

Correct Answer: Opportunity Sampling

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What does quote sampling involve?

Answer

Correct Answer: Selecting a predetermined number of sampling units with certain defined characteristics.

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What is random sampling?

Answer

Correct Answer: Every member of the population has an equal chance of selection.

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In statistics, what is the population?

Answer

Correct Answer: Every item or person within a group that you want to find information about.

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What is the textual method?

Answer

Correct Answer: A method of narration using words and text

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What is the meaning of secondary data?

Answer

Correct Answer: Data/information collected from published or unpublished resources

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What is primary data?

Answer

Correct Answer: Data from an original source of data

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What does ratio level Processes mean?

Answer

Correct Answer: All the characteristics of interval measurement and here exists a true zero

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What is the level of measurement that includes a true zero?

Answer

Correct Answer: Ratio

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What is the interval level of measurement?

Answer

Correct Answer: Ranks data and precise difference between units of measure do exist, there is no meaningful zero

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What is the definition of "dependent variable"?

Answer

Correct Answer: The outcome variables being observed

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What is the name for the type of variable being observed in a study when the outcome variable is dependent?

Answer

Correct Answer: Dependent variable

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Which of the following is an ordinal level data type?

Answer

Correct Answer: Precise differences bet. the ranks do not exist

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What is the definition of a dependent variable?

Answer

Correct Answer: The outcome variables being observed

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What is the term for a variable that is being measured or observed?

Answer

Correct Answer: Independent variable

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What does the word "continuous" mean?

Answer

Correct Answer: Unbroken

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What is the next value in the sequence: 1, 3, 5, 7?

Answer

Correct Answer: 9

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What does quantitative data refer to?

Answer

Correct Answer: Countable or measurable attributes

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Which of the following is a Qualitative Research Method?

Answer

Correct Answer: Focus Groups

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What is Qualitative?

Answer

Correct Answer: Attributes that are not numerical

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What is a variable?

Answer

Correct Answer: A characteristic or attribute of interest

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What is a parameter?

Answer

Correct Answer: Numerical measurement describing the population

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What is the main purpose of Inferential Statistics?

Answer

Correct Answer: Making predictions

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What is Descriptive Statistics?

Answer

Correct Answer: A method of data analysis that deals with summarizing and describing data.

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What is statistics?

Answer

Correct Answer: The science of conducting studies

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What is the goal of medicine?

Answer

Correct Answer: To determine the effect of various drugs

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What is the study of the factors that affect human behavior called?

Answer

Correct Answer: Behavioral Sciences

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Sampling and quality assurance are important in which industry?

Answer

Correct Answer: Manufacturing and Engineering

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What is Economics?

Answer

Correct Answer: The study of how people use resources and goods to satisfy their needs and wants.

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What is business planning?

Answer

Correct Answer: The process of creating a business plan

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What is a confidence interval?

Answer

Correct Answer: A range of acceptable outcome values

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What is the chance of the experiment being valid?

Answer

Correct Answer: Test of significance

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What is the name for a more polarizing distribution with smaller sample sizes?

Answer

Correct Answer: Bell curve

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What is the name of the symmetrical probability distribution that is defined by a bell-shaped curve?

Answer

Correct Answer: Normal distribution

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What is systematic sampling?

Answer

Correct Answer: A method of sampling that involves selecting a unit from an ordered sampling frame at fixed intervals

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What does simple random sampling mean?

Answer

Correct Answer: All members have the same probability of being selected

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What is Perameter?

Answer

Correct Answer: Characteristic of the population like blue eyes or whatever characteristic

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What is statistical inference?

Answer

Correct Answer: Generalizing about population from sample

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How do you calculate the coefficient of correlation?

Answer

Correct Answer: You divide the covariance of X and Y by the product of the standard deviations of X and Y.

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What is linear regression used for?

Answer

Correct Answer: Ability to predict future outcome

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What is the variance of the square of the standard deviation?

Answer

Correct Answer: The square of the standard deviation

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What does standard deviation measure?

Answer

Correct Answer: How much a sample deviates from the mean

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What does degree of dispersion of data tell us?

Answer

Correct Answer: Measures of variation

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What is the mode?

Answer

Correct Answer: Most frequent value

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What is the value of the median?

Answer

Correct Answer: Middle data point

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What is population?

Answer

Correct Answer: A set of all possible observation

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Which of the following is NOT a characteristic of a histogram?

Answer

Correct Answer: Frequency on horizontal axis and measurements on vertical axis

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What is the systematic collection of data illustrating the frequency at which a value occurs called?

Answer

Correct Answer: Frequency distribution

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What is the main purpose of descriptive statistics?

Answer

Correct Answer: To describe important features of data

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What is the science of decision making called?

Answer

Correct Answer: Statistics

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What is the centre of mass?

Answer

Correct Answer: A point on a body where the entire mass of the body is assumed to be concentrated

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What is the Centre of Gravity?

Answer

Correct Answer: The point at which the force of gravity acts on a body

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What is the ratio of velocity of driven pulley to the velocity of driving/driver pulley?

Answer

Correct Answer: Velocity Ratio

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What is the angle of V-belt?

Answer

Correct Answer: 30-45

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From which material are flat belts made?

Answer

Correct Answer: Leather, cotton, rubber

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What is the max angle of inclination of plane in which the body remains in equilibrium under the action of friction only called?

Answer

Correct Answer: Angle of Repose

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What is the angle of friction?

Answer

Correct Answer: The angle between the normal reaction and the resultant of frictional force.

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What does the coefficient of friction tell us?

Answer

Correct Answer: The ratio of frictional force to the normal reaction between the contact surface.

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What is the name of the frictional force that is encountered when the motion is just beginning?

Answer

Correct Answer: Limiting friction

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What is the name of the friction experienced by the body when it is in motion?

Answer

Correct Answer: Dynamic/kinematic friction

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What is Frictional Force?

Answer

Correct Answer: It is the force distribution at the surface of contact and tangential to the surface of contact.

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What is a strut?

Answer

Correct Answer: A member under compression

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What is a "Tie A member"?

Answer

Correct Answer: A member under tension

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What does uniformly distributed load mean?

Answer

Correct Answer: The load is evenly distributed over the entire length of the beam.

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What is a continuous beam?

Answer

Correct Answer: A beam provided with more than two supports.

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What is an overhanging beam?

Answer

Correct Answer: A beam having one or both ends extended over the support.

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What is the definition of Span?

Answer

Correct Answer: The horizontal distance between the support

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Freely supported beam implies that the supports exert forces with no moment on the beam. True or false?

Answer

Correct Answer: True

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What is a simply supported beam?

Answer

Correct Answer: A beam made to freely rest on supports which may be knife edges or rollers.

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What is a fixed beam?

Answer

Correct Answer: A beam having both ends fixed.

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What is Cantilever beam?

Answer

Correct Answer: A beam having its one end fixed and other end free to deflect.

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What can Moment of force be measured by?

Answer

Correct Answer: The product of force and the perpendicular of the line of action from that point.

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What is a rigid body?

Answer

Correct Answer: A body in which the relative position of any 2 particles does not change the action of force

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What does it mean when a body is in equilibrium?

Answer

Correct Answer: The body is at rest or continues to be in steady linear motion.

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What is the resultant of a force system?

Answer

Correct Answer: The process of finding the composition of forces

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What is a resultant of concurrent forces?

Answer

Correct Answer: A single force having same effect as that of a number of forces acting on a given body.

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In a concurrent force system, the line of action of all forces in the system pass through a ________.

Answer

Correct Answer: Single point

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What is the name of the force system in which all forces are parallel to each other and lie in the same plane?

Answer

Correct Answer: Coplanar Parallel Force system

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What is a coplanar force system?

Answer

Correct Answer: A system of forces acting on a body and all lie in the same plane

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In aCollinear Force system, the line of action of all forces act along _____.

Answer

Correct Answer: The same line

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What are vector quantities?

Answer

Correct Answer: Quantities which are determined by magnitude as well as direction.

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Scalar quantities are determined by what?

Answer

Correct Answer: Magnitude

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Kinematics is a branch of ___________.

Answer

Correct Answer: Dynamics

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What is the study of motion without reference to the forces that cause it called?

Answer

Correct Answer: Kinematics

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What is kinetics?

Answer

Correct Answer: The study of motion

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What is the study of motion of objects due to the action of forces called?

Answer

Correct Answer: Kinetics

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What is the branch of mechanics which deals with force and its effects while acting upon the body in motion?

Answer

Correct Answer: Dynamics

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What is the branch of mechanics which deals with force and its effects while acting upon the body at rest?

Answer

Correct Answer: Statics

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According to Newton's Third Law of Motion, for every action there is what?

Answer

Correct Answer: Equal and opposite reaction.

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Full form of NASA

Answer

Correct Answer: National Aeronautics and Space Administration

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