DETAILS OF EXTERNAL EVALUATION
Theory Courses
Different types of questions are asked to test different abilities of the student. For instance.
1.Multiple Choice / Objective Type questions
2.Short Answer type questions
3.Short Essays / Problems
4.Long Essays
An essay type question can test multiple skills such as information recall, comprehension, analysis, application, syn thesis, judgement etc., whereas an objective type question usally can test only fewer skills. Thus ‘A grade’ awarded for an essay type will have more weight than the ‘A Grade’ awarded for an objective type. Therefore different types of questions are given different weights. Weights are similar to marks in the traditional marks system. Imagine a con ventional question paper for total marks of 100, consisting of 20 Objective type questions each of 1 mark, 6 short an swer type questions each of 4 marks, 3 short essay/Prob lem type questions each of 8 marks and Long Essay type questions each of 16 marks. Then, we say that the relative weights of these 4 types of questions are 1, 4, 8, 16 or 1/4, 1, 2, 4 respectively. For convenience, let us first consider that there are only one question of each type to be answered and A, C, A and B be respectively the grades scored for them. Then the combined grade for the answer paper con sisting of these 4 answers is calculated as follows.
Calculation of combined Grade
Type 
Weight 
Grade awarded 
Grade Points 
Weight GradePoints 





Objective Type 
¼ 
A 
4 
1 
Short answer Type 
1 
C 
2 
2 
Short EssayType 
2 
A 
4 
8 
EssayType 
4 
B 
3 
12 
Total 
7.25 


23 
Overall Grade : Sum of weighted grade points/ Sum of weights = 23/7.25 = 3.17; Grade B
Thus, the overall grade is B. Here, we note that the ‘inconvenient’ division by 7.25 occurs because of the frac tional weight (1/4) of the objective type. This can be easily avoided if we bunch 4 objective type questions together, sicne such a bunch will have weight equal to 1. Further, if all 4 answers are correct, the bunch can be graded as A; if 3 are correct, the bunch can be graded as B; for 2 correct answers, C grade; for 1 correct answer, D grade: for no correct answer, the bunch gets E grade. Thus, in a 5 point scale, its is advisable to set objective type questins in bunches of four for the convenience of tabulation.
Calculation of the Grade of an answer paper (External Grade)
Let us now consider the full question paper consisting of 20 objective type, 6 short answer type, 3 Short Essay type and 2 Essay type questions. The 20 objective type questions are set into 5 bunches of four; 14,58;912; 13 16; 1720. Knowing the grades awarded to the answers of these questions, the overall grade of the answer paper can be calculated as shown in the Table
Calculation of the Grade of an Answer Paper.
Question Type 
Question 
Grade awarded/ 
Weight 
Weighted 

No 
Points Grade 
Grade point 


14 
C (2) 
1 
2 
Objectiove 
58 
B (3) 
1 
3 

912 
D (1) 
1 
1 

1316 
F(0) 
1 
0 

1720 
A (4) 
1 
4 

21 
A(4) 
1 
4 

22 
D(1) 
1 
1 
Short answer 
23 
C(2) 
1 
2 

24 
B (3) 
1 
3 

25 
A(4) 
1 
4 

26 
A (4) 
1 
4 

27 
B (3) 
2 
6 

28 
B (3) 
2 
6 

29 
C (2) 
2 
4 
Long Essay 
30 
b (3) 
4 
12 

31 
D(1) 
4 
4 
Total 


25 
60 





Grade of Paper : Sum of weighted grade points/Sum of weight = 60/25 = 2.4 = Grade C
Practical Courses
The grade of a practical course may be calculated by a similar procedure discussed above by assigning weights for the various components (e.g. Procedure, Calcuation, Accuracy of the reported values,Presentation of results, Diagrams etc.) The Boards of studies shall define the components, their weights and show them in the model question paper included in the scheme and syllabus of each practi cal course.