MCQOPTIONS

Explore topic-wise MCQs in Statistical Quality Control.

This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Statistical Quality Control knowledge and support exam preparation. Choose a topic below to get started.

1.	Count rate of a defect is defined as _____________
A.	Defects per unit
B.	Average number of defects per unit
C.	Total number of nonconformities
D.	Occurrence of n defects in N number of units
Answer» E.

2.	The sample for the control chart for nonconformities is assumed to have, a variable sample size, and the sample conformities distributed according to Normal distribution.
A.	True
B.	False
Answer» C.

3.	For a control chart for nonconformities, the sample size can only be 1.
A.	True
B.	False
Answer» C.

4.	If xi=total number of nonconformities in a sample of ni inspection units, and there are N samples of different sample size, and x varies according to a Poisson distribution, what will be the value of center line of the u-chart?
A.	\(\bar{u} = \frac{\sum_{i=1}^N \frac{2x_i}{n_i}}{N}\)
B.	\(\bar{u} = \frac{\sum_{i=1}^N \frac{x_i}{2n_i}}{2N}\)
C.	\(\bar{u} = \frac{\sum_{i=1}^N \frac{x_i}{n_i}}{N}\)
D.	\(\bar{u} = \frac{\sum_{i=1}^N \frac{x_i}{n_i}}{2N}\)
Answer» D. \(\bar{u} = \frac{\sum_{i=1}^N \frac{x_i}{n_i}}{2N}\)

5.	The control chart used to inspect the process state by using the average number of nonconformities per unit data, is called _______________
A.	u-chart
B.	c-chart
C.	p-chart
D.	R-chart
Answer» B. c-chart

6.	With c-chart, which of these is used to analyze nonconformity data?
A.	X bar charts
B.	R charts
C.	Cause and Effect diagram
D.	Tolerance Diagram
Answer» D. Tolerance Diagram

7.	For c=13.11, what will be the value of LCL for the c-chart?
A.	23.97
B.	10.86
C.	8.84
D.	2.24
Answer» E.

8.	If the average number of nonconformities in a preliminary sample of a process is 19.67, which of these represents the value of UCL for a c-chart for this process output?
A.	19.67
B.	6.37
C.	32.97
D.	25.77
Answer» D. 25.77

9.	When there is no standard given, the value of LCL for the c-chart is given by ___________
A.	LCL=\(\bar{c}-3\sqrt{\bar{c}}\)
B.	LCL=\(\bar{c}+2\sqrt{\bar{c}}\)
C.	LCL=\(\bar{c}-2\sqrt{\bar{c}}\)
D.	LCL=\(\bar{c}+3\sqrt{\bar{c}}\)
Answer» E.

10.	The center line for the control chart for nonconformities is representing the value equal c, which is ____________
A.	The total number of nonconformities
B.	The average number of conformities in a preliminary sample
C.	The total number of nonconforming products
D.	The total number of conforming products
Answer» C. The total number of nonconforming products

11.	What will be the value of the 3-sigma Upper control limit for the c chart when standard is given?
A.	UCL = c + 3√c
B.	UCL = c – √c
C.	UCL = c + √c
D.	UCL = c + 2√c
Answer» B. UCL = c – √c

12.	Which of these is not an assumption of the c-chart?
A.	Number of potential locations for nonconformities should be large
B.	Probability of occurrence of nonconformities should be small
C.	Probability of occurrence of nonconformities should be variable
D.	Probability of occurrence of nonconformities should be constant
Answer» D. Probability of occurrence of nonconformities should be constant

13.	Which of these is an assumption made for designing a control chart for noncorformities?
A.	Normal Distribution
B.	Poisson Distribution
C.	Lognormal Distribution
D.	Weibull Distribution
Answer» C. Lognormal Distribution

14.	The c-control chart is plotted for _____________
A.	Fraction nonconforming
B.	Number of nonconformities per unit
C.	Number of defects observed
D.	Deviation from median of the defects in samples
Answer» D. Deviation from median of the defects in samples

15.	A nonconforming item has at least ____________ conformities.
A.	4
B.	3
C.	1
D.	2
Answer» D. 2

16.	The event of a specification not satisfied at one point of a product, is called ____________
A.	Nonconformity
B.	Non-defectiveness
C.	Un-specification
D.	Non-specification
Answer» B. Non-defectiveness