Download PDF – RRB LA UT07 – Quality Assurance & QC Practice Test (IQC, EQAS, Westgard Rules)

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RRB LA UT07 – Quality Assurance & QC Practice Test (IQC, EQAS, Westgard Rules)

Q1. Which term defines the closeness of agreement between a measured value and the true or reference value of an analyte?

A) Accuracy

B) Precision

C) Reliability

D) Specificity

Q1. मापे गए मान और विश्लेष्य के वास्तविक या संदर्भ मान के बीच की निकटता को क्या कहा जाता है?

A) यथार्थता (Accuracy)

B) परिशुद्धता (Precision)

C) विश्वसनीयता (Reliability)

D) विशिष्टता (Specificity)

Answer: (A)

Accuracy refers to the closeness of a measured result to the true or accepted reference value. Precision refers to repeatability.

यथार्थता (Accuracy) किसी परीक्षण मान की उसके वास्तविक या स्वीकृत संदर्भ मान से निकटता को दर्शाती है। [स्रोत: डॉ. प्रफुल बी. गोडकर - मेडिकल लेबोरेटरी टेक्नोलॉजी]

Q2. What is the statistical formula used to calculate the Coefficient of Variation (CV%) in laboratory quality control?

A) CV% = (Mean / SD) x 100

B) CV% = (Standard Deviation / Mean) x 100

C) CV% = (Variance / Mean) x 100

D) CV% = (Mean / Variance) x 100

Q2. प्रयोगशाला गुणवत्ता नियंत्रण में विचरण गुणांक (CV%) की गणना करने के लिए किस सूत्र का उपयोग किया जाता है?

A) CV% = (माध्य / SD) × 100

B) CV% = (मानक विचलन / माध्य) × 100

C) CV% = (प्रसरण / माध्य) × 100

D) CV% = (माध्य / प्रसरण) × 100

Answer: (B)

The Coefficient of Variation (CV%) expresses standard deviation as a percentage of the mean: CV% = (SD / Mean) x 100. Lower CV% indicates superior analytical precision.

विचरण गुणांक (CV%) का सूत्र CV% = (मानक विचलन / माध्य) × 100 होता है। कम CV% उच्च परिशुद्धता को दर्शाता है। [स्रोत: टिट्ज़ क्लिनिकल केमिस्ट्री]

Q3. In a Gaussian distribution, what percentage of control values falls within the range of Mean ± 2 Standard Deviations (±2 SD)?

A) 68.2%

B) 90.0%

C) 95.5%

D) 99.7%

Q3. सामान्य गॉसियन वितरण में, कितने प्रतिशत नियंत्रण मान माध्य ± 2 मानक विचलन (±2 SD) की सीमा के भीतर आते हैं?

A) 68.2%

B) 90.0%

C) 95.5%

D) 99.7%

Answer: (C)

In a normal Gaussian curve, approximately 68.2% of values fall within ±1 SD, 95.5% within ±2 SD, and 99.7% within ±3 SD of the mean.

सामान्य गॉसियन वितरण में 68.2% मान ±1 SD के भीतर, 95.5% मान ±2 SD के भीतर, और 99.7% मान ±3 SD के भीतर आते हैं। [स्रोत: डॉ. प्रफुल बी. गोडकर - मेडिकल लेबोरेटरी टेक्नोलॉजी]

Q4. What statistical line represents the center of a clinical laboratory Levey-Jennings (L-J) control chart?

A) Median

B) Mode

C) Variance

D) Target Mean

Q4. क्लिनिकल प्रयोगशाला के लेवे-जेनिंग्स (L-J) कंट्रोल चार्ट के केंद्र में कौन सी सांख्यिकीय रेखा होती है?

A) माध्यिका (Median)

B) बहुलक (Mode)

C) प्रसरण (Variance)

D) लक्षित माध्य (Target Mean)

Answer: (D)

The central horizontal baseline of a Levey-Jennings chart represents the target mean value of the control material, with parallel lines at ±1, ±2, and ±3 SD.

लेवे-जेनिंग्स चार्ट की केंद्रीय क्षैतिज रेखा नियंत्रण सामग्री के लक्षित माध्य (Target Mean) को दर्शाती है। [स्रोत: डॉ. प्रफुल बी. गोडकर - मेडिकल लेबोरेटरी टेक्नोलॉजी]

Q5. Under standard Westgard multirule protocols, which rule is defined as a warning rule that alerts the technologist to inspect analytical data?

A) 1_2s rule

B) 1_3s rule

C) 2_2s rule

D) R_4s rule

Q5. मानक वेस्टगार्ड बहु-नियमों के तहत, किस नियम को चेतावनी नियम (Warning rule) के रूप में परिभाषित किया गया है?

A) 1_2s नियम

B) 1_3s नियम

C) 2_2s नियम

D) R_4s नियम

Answer: (A)

The 1_2s rule is triggered when one control observation exceeds ±2 SD. It is conventionally treated as a warning rule, prompting closer review of the run.

1_2s नियम तब लागू होता है जब कोई एक नियंत्रण मान ±2 SD से बाहर जाता है। यह चेतावनी नियम है जो डेटा की समीक्षा का संकेत देता है। [स्रोत: डॉ. प्रफुल बी. गोडकर - एमएलटी]

Q6. Which Westgard multi-rule violation indicates a run rejection caused by acute random error when a single control exceeds ±3 SD?

A) 1_2s rule

B) 1_3s rule

C) 4_1s rule

D) 10_x rule

Q6. जब एक एकल नियंत्रण मान ±3 SD से बाहर चला जाता है, तो कौन सा वेस्टगार्ड नियम तीव्र यादृच्छिक त्रुटि (Random error) के कारण रन को अस्वीकार करता है?

A) 1_2s नियम

B) 1_3s नियम

C) 4_1s नियम

D) 10_x नियम

Answer: (B)

The 1_3s rule is a mandatory run-rejection rule triggered when a single control value exceeds ±3 SD, primarily sensitive to acute random error.

1_3s नियम तब लागू होता है जब एक नियंत्रण मान ±3 SD से बाहर निकल जाता है। यह यादृच्छिक त्रुटि (random error) के कारण परीक्षण रन अस्वीकार करने का नियम है। [स्रोत: टिट्ज़ क्लिनिकल केमिस्ट्री]

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