Control Charts for x̅ and R MCQ

Test your knowledge with important Control Charts for x̅ and R MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30+ more Control Charts for x̅ and R MCQs on Bissoy. Bissoy App

• Which of these should be plotted on the x bar chart?
  ক

  Counts

  খ

  Defects

  গ

  Problems Solved

  ঘ

  Measurements
• A permanent change in the sample size is made only because of cost or because has exhibited good stability and fewer resources are allocated for process monitoring.
  ক

  True

  খ

  False
• A mixture pattern in the control chart points is exhibited when __________ occurs.
  ক

  Operator fatigue

  খ

  Change of raw materials

  গ

  Continuous wear of tool

  ঘ

  Adjustments too often responding to random variation
• If the probability of one point plotting out of control limits of a X bar control charts is 0.0143, what will be its expected number of individual units sampled with subgroup size 8?
  ক

  559

  খ

  544

  গ

  530

  ঘ

  580
• Slope of OC curve for x bar chart will _________ when sample size is increased.
  ক

  Decrease

  খ

  Increase

  গ

  Remain same

  ঘ

  Decrease then increase
• If the sample size is 7 and the Average run length is 122 for a process, what will be the expected number of the individual units sampled?
  ক

  850

  খ

  854

  গ

  867

  ঘ

  844
• The probability of not detecting “an in-control shift” of the mean of the process is said to be the _____
  ক

  α – Risk

  খ

  β – Risk

  গ

  γ – Risk

  ঘ

  δ – Risk
• The assumption that links normality to the control charts is ___________
  ক

  The underlying distribution of the quality characteristic is normal

  খ

  The normal mean will be equal to the process mean

  গ

  The normal distribution is not the correct distribution for all the quality characteristic

  ঘ

  Every distribution is a part of normal distribution
• is no need of revision of control limits once calculated by the equations of control limits.
  ক

  True

  খ

  False
• Process standard deviation is necessarily equal to the sample standard deviation of the same process.
  ক

  True

  খ

  False
• What type of chart will be used to plot the number of defectives in the output of any process?
  ক

  x bar chart

  খ

  R chart

  গ

  c chart

  ঘ

  p chart
• The natural variability of the process is measured by ____________
  ক

  Process mean

  খ

  Sample standard deviation

  গ

  Process standard deviation

  ঘ

  Sample mean
• Control limits are ___________
  ক

  Limits defined by customers

  খ

  Limits driven by the natural variability of the process

  গ

  Limits driven by the inherent variability of the process

  ঘ

  Statistical limits
• Is there any relationship between specification limits and control limits of x and R charts?
  ক

  Yes, Specification limits = Control limits

  খ

  Yes, Control limits=Specification limits/2

  গ

  No

  ঘ

  Yes, Control limits*0.5 = Specification limits
• A tolerance diagram is also called ____________
  ক

  Scatter diagram

  খ

  Defect concentration diagram

  গ

  Histogram

  ঘ

  Tier chart
• Process capability generally uses __________
  ক

  Specifications

  খ

  Control Limits

  গ

  Process standard deviation

  ঘ

  Mean of any one sample
• Which term is having a closest meaning as Sampling Distributions?
  ক

  Control charts

  খ

  On site inspection

  গ

  Whole lot inspection

  ঘ

  Acceptance sampling
• In phase I application of x and R chart, the control limits obtained from the equations are treated as ____________
  ক

  Final limits

  খ

  Trial limits

  গ

  Warning limits

  ঘ

  Pattern limits
• LCL for the R chart is given by __________
  ক

  D3 R

  খ

  D2 R

  গ

  R – D3 R

  ঘ

  d2 R
• Process variability can only be described and monitored by the s control chart.
  ক

  True

  খ

  False
• For a random variable having a normal distribution, the ratio of its range to the standard deviation is called ____________
  ক

  Relative range

  খ

  Absolute range

  গ

  Major range

  ঘ

  Minor range
• Specifications have the same meaning as ____________
  ক

  Control limits

  খ

  UCL

  গ

  LCL

  ঘ

  Tolerances
• Tolerances are said to be ________
  ক

  limits of natural variability

  খ

  Statistical limits of variability

  গ

  Limits determined by the customers of the product

  ঘ

  Limits of inherent process variability
• If a process is said to be in control, what can we say about the variation?
  ক

  Random

  খ

  Normal

  গ

  Attribute

  ঘ

  Assignable
• X chart is a ____________
  ক

  Attribute control chart

  খ

  Variable control chart

  গ

  Neither a variable control chart nor an attribute control chart

  ঘ

  Falls in the category of both variable and attribute control charts
• Toughness of a bolt mount on a tank is __________
  ক

  An attribute

  খ

  A variable

  গ

  Variable and an attribute

  ঘ

  Variability
• S chart is used to monitor _________ of a quality characteristic.
  ক

  Mean

  খ

  Range

  গ

  Variability

  ঘ

  Attributes
• Control of the process average or mean quality level is usually done with the ___________ control chart.
  ক

  X bar control chart

  খ

  S control chart

  গ

  R chart

  ঘ

  P chart
• A variable quality characteristic will have both __________
  ক

  Mean and variability

  খ

  Discrete and continuous values

  গ

  Zero and infinite value

  ঘ

  One or zero
• A single measureable quality characteristic, such as dimension, weight, or volume, is called ________
  ক

  Variable

  খ

  Attribute

  গ

  Variable and an Attribute

  ঘ

  Mean and variablility