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Machine Breakdown Recovery Advanced Worksheet: Focus on exam-oriented approach Machine Breakdown Recovery ADVANCED

Level up your Machine Breakdown Recovery skills! You're at Worksheet 8 of 10 (77% through this series). This exam hall simulation worksheet features 20 advanced-level problems with a focus on exam-oriented approach. Topics covered: machine breakdown recovery bank exam questions, machine breakdown recovery ssc cgl, machine breakdown recovery reasoning tricks.

📝 Worksheet 8 of 10 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Advanced level

What you'll learn in this worksheet:
Your progress through Machine Breakdown Recovery
Worksheet 8 of 10 (77% complete)

Question 1

A machine needs to process 4 jobs. Processing times: - Job E: 63 minutes - Job D: 74 minutes - Job C: 33 minutes - Job A: 38 minutes The machine breaks down at 67 minutes and takes 28 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job C → Job A → Job E → Job D
2. Simulate processing with breakdown:
- Job C: 0 → 33
- Job A: Starts at 33, breakdown at 67 (34 min completed), repair 28 min, resume 4 min → completes at 99
- Job E: 99 → 162
- Job D: 162 → 236

3. Total makespan: 236 minutes
4. Delay caused by breakdown: 28 minutes

Answer: 236 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 2

A machine needs to process 4 jobs. Processing times: - Job C: 63 minutes - Job B: 46 minutes - Job E: 87 minutes - Job D: 72 minutes The machine breaks down at 116 minutes and takes 31 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job B → Job C → Job D → Job E
2. Simulate processing with breakdown:
- Job B: 0 → 46
- Job C: 46 → 109
- Job D: Starts at 109, breakdown at 116 (7 min completed), repair 31 min, resume 65 min → completes at 212
- Job E: 212 → 299

3. Total makespan: 299 minutes
4. Delay caused by breakdown: 31 minutes

Answer: 299 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 3

A machine needs to process 4 jobs. Processing times: - Job B: 34 minutes - Job C: 67 minutes - Job E: 74 minutes - Job A: 44 minutes The machine breaks down at 63 minutes and takes 31 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job B → Job A → Job C → Job E
2. Simulate processing with breakdown:
- Job B: 0 → 34
- Job A: Starts at 34, breakdown at 63 (29 min completed), repair 31 min, resume 15 min → completes at 109
- Job C: 109 → 176
- Job E: 176 → 250

3. Total makespan: 250 minutes
4. Delay caused by breakdown: 31 minutes

Answer: 250 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 4

A machine needs to process 4 jobs. Processing times: - Job A: 48 minutes - Job C: 67 minutes - Job B: 32 minutes - Job E: 44 minutes The machine breaks down at 85 minutes and takes 40 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job B → Job E → Job A → Job C
2. Simulate processing with breakdown:
- Job B: 0 → 32
- Job E: 32 → 76
- Job A: Starts at 76, breakdown at 85 (9 min completed), repair 40 min, resume 39 min → completes at 164
- Job C: 164 → 231

3. Total makespan: 231 minutes
4. Delay caused by breakdown: 40 minutes

Answer: 231 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 5

A machine needs to process 4 jobs. Processing times: - Job E: 39 minutes - Job D: 36 minutes - Job A: 78 minutes - Job B: 73 minutes The machine breaks down at 114 minutes and takes 43 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job D → Job E → Job B → Job A
2. Simulate processing with breakdown:
- Job D: 0 → 36
- Job E: 36 → 75
- Job B: Starts at 75, breakdown at 114 (39 min completed), repair 43 min, resume 34 min → completes at 191
- Job A: 191 → 269

3. Total makespan: 269 minutes
4. Delay caused by breakdown: 43 minutes

Answer: 269 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 6

A machine needs to process 4 jobs. Processing times: - Job D: 54 minutes - Job A: 37 minutes - Job E: 45 minutes - Job C: 37 minutes The machine breaks down at 96 minutes and takes 22 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job A → Job C → Job E → Job D
2. Simulate processing with breakdown:
- Job A: 0 → 37
- Job C: 37 → 74
- Job E: Starts at 74, breakdown at 96 (22 min completed), repair 22 min, resume 23 min → completes at 141
- Job D: 141 → 195

3. Total makespan: 195 minutes
4. Delay caused by breakdown: 22 minutes

Answer: 195 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 7

A machine needs to process 4 jobs. Processing times: - Job A: 84 minutes - Job C: 61 minutes - Job D: 52 minutes - Job B: 45 minutes The machine breaks down at 98 minutes and takes 20 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job B → Job D → Job C → Job A
2. Simulate processing with breakdown:
- Job B: 0 → 45
- Job D: 45 → 97
- Job C: Starts at 97, breakdown at 98 (1 min completed), repair 20 min, resume 60 min → completes at 178
- Job A: 178 → 262

3. Total makespan: 262 minutes
4. Delay caused by breakdown: 20 minutes

Answer: 262 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 8

A machine needs to process 4 jobs. Processing times: - Job B: 73 minutes - Job D: 66 minutes - Job A: 48 minutes - Job C: 51 minutes The machine breaks down at 116 minutes and takes 45 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job A → Job C → Job D → Job B
2. Simulate processing with breakdown:
- Job A: 0 → 48
- Job C: 48 → 99
- Job D: Starts at 99, breakdown at 116 (17 min completed), repair 45 min, resume 49 min → completes at 210
- Job B: 210 → 283

3. Total makespan: 283 minutes
4. Delay caused by breakdown: 45 minutes

Answer: 283 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 9

A machine needs to process 4 jobs. Processing times: - Job C: 67 minutes - Job B: 40 minutes - Job D: 55 minutes - Job A: 57 minutes The machine breaks down at 117 minutes and takes 20 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job B → Job D → Job A → Job C
2. Simulate processing with breakdown:
- Job B: 0 → 40
- Job D: 40 → 95
- Job A: Starts at 95, breakdown at 117 (22 min completed), repair 20 min, resume 35 min → completes at 172
- Job C: 172 → 239

3. Total makespan: 239 minutes
4. Delay caused by breakdown: 20 minutes

Answer: 239 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 10

A machine needs to process 4 jobs. Processing times: - Job C: 83 minutes - Job B: 62 minutes - Job D: 66 minutes - Job A: 60 minutes The machine breaks down at 98 minutes and takes 28 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job A → Job B → Job D → Job C
2. Simulate processing with breakdown:
- Job A: 0 → 60
- Job B: Starts at 60, breakdown at 98 (38 min completed), repair 28 min, resume 24 min → completes at 150
- Job D: 150 → 216
- Job C: 216 → 299

3. Total makespan: 299 minutes
4. Delay caused by breakdown: 28 minutes

Answer: 299 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 11

A machine needs to process 4 jobs. Processing times: - Job B: 63 minutes - Job C: 86 minutes - Job D: 68 minutes - Job E: 86 minutes The machine breaks down at 87 minutes and takes 15 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job B → Job D → Job C → Job E
2. Simulate processing with breakdown:
- Job B: 0 → 63
- Job D: Starts at 63, breakdown at 87 (24 min completed), repair 15 min, resume 44 min → completes at 146
- Job C: 146 → 232
- Job E: 232 → 318

3. Total makespan: 318 minutes
4. Delay caused by breakdown: 15 minutes

Answer: 318 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 12

A machine needs to process 4 jobs. Processing times: - Job C: 56 minutes - Job E: 83 minutes - Job A: 57 minutes - Job B: 50 minutes The machine breaks down at 111 minutes and takes 44 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job B → Job C → Job A → Job E
2. Simulate processing with breakdown:
- Job B: 0 → 50
- Job C: 50 → 106
- Job A: Starts at 106, breakdown at 111 (5 min completed), repair 44 min, resume 52 min → completes at 207
- Job E: 207 → 290

3. Total makespan: 290 minutes
4. Delay caused by breakdown: 44 minutes

Answer: 290 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 13

A machine needs to process 4 jobs. Processing times: - Job D: 32 minutes - Job C: 80 minutes - Job E: 51 minutes - Job A: 33 minutes The machine breaks down at 68 minutes and takes 23 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job D → Job A → Job E → Job C
2. Simulate processing with breakdown:
- Job D: 0 → 32
- Job A: 32 → 65
- Job E: Starts at 65, breakdown at 68 (3 min completed), repair 23 min, resume 48 min → completes at 139
- Job C: 139 → 219

3. Total makespan: 219 minutes
4. Delay caused by breakdown: 23 minutes

Answer: 219 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 14

A machine needs to process 4 jobs. Processing times: - Job C: 74 minutes - Job A: 40 minutes - Job B: 50 minutes - Job D: 48 minutes The machine breaks down at 95 minutes and takes 40 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job A → Job D → Job B → Job C
2. Simulate processing with breakdown:
- Job A: 0 → 40
- Job D: 40 → 88
- Job B: Starts at 88, breakdown at 95 (7 min completed), repair 40 min, resume 43 min → completes at 178
- Job C: 178 → 252

3. Total makespan: 252 minutes
4. Delay caused by breakdown: 40 minutes

Answer: 252 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 15

A machine needs to process 4 jobs. Processing times: - Job E: 78 minutes - Job C: 71 minutes - Job B: 37 minutes - Job D: 62 minutes The machine breaks down at 63 minutes and takes 36 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job B → Job D → Job C → Job E
2. Simulate processing with breakdown:
- Job B: 0 → 37
- Job D: Starts at 37, breakdown at 63 (26 min completed), repair 36 min, resume 36 min → completes at 135
- Job C: 135 → 206
- Job E: 206 → 284

3. Total makespan: 284 minutes
4. Delay caused by breakdown: 36 minutes

Answer: 284 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 16

A machine needs to process 4 jobs. Processing times: - Job A: 64 minutes - Job C: 83 minutes - Job B: 70 minutes - Job D: 61 minutes The machine breaks down at 111 minutes and takes 27 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job D → Job A → Job B → Job C
2. Simulate processing with breakdown:
- Job D: 0 → 61
- Job A: Starts at 61, breakdown at 111 (50 min completed), repair 27 min, resume 14 min → completes at 152
- Job B: 152 → 222
- Job C: 222 → 305

3. Total makespan: 305 minutes
4. Delay caused by breakdown: 27 minutes

Answer: 305 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 17

A machine needs to process 4 jobs. Processing times: - Job A: 73 minutes - Job C: 31 minutes - Job E: 50 minutes - Job D: 46 minutes The machine breaks down at 85 minutes and takes 28 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job C → Job D → Job E → Job A
2. Simulate processing with breakdown:
- Job C: 0 → 31
- Job D: 31 → 77
- Job E: Starts at 77, breakdown at 85 (8 min completed), repair 28 min, resume 42 min → completes at 155
- Job A: 155 → 228

3. Total makespan: 228 minutes
4. Delay caused by breakdown: 28 minutes

Answer: 228 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 18

A machine needs to process 4 jobs. Processing times: - Job C: 51 minutes - Job B: 50 minutes - Job D: 57 minutes - Job A: 61 minutes The machine breaks down at 87 minutes and takes 45 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job B → Job C → Job D → Job A
2. Simulate processing with breakdown:
- Job B: 0 → 50
- Job C: Starts at 50, breakdown at 87 (37 min completed), repair 45 min, resume 14 min → completes at 146
- Job D: 146 → 203
- Job A: 203 → 264

3. Total makespan: 264 minutes
4. Delay caused by breakdown: 45 minutes

Answer: 264 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 19

A machine needs to process 4 jobs. Processing times: - Job C: 40 minutes - Job B: 88 minutes - Job A: 89 minutes - Job D: 80 minutes The machine breaks down at 116 minutes and takes 41 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job C → Job D → Job B → Job A
2. Simulate processing with breakdown:
- Job C: 0 → 40
- Job D: Starts at 40, breakdown at 116 (76 min completed), repair 41 min, resume 4 min → completes at 161
- Job B: 161 → 249
- Job A: 249 → 338

3. Total makespan: 338 minutes
4. Delay caused by breakdown: 41 minutes

Answer: 338 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.

Question 20

A machine needs to process 4 jobs. Processing times: - Job D: 74 minutes - Job A: 38 minutes - Job E: 35 minutes - Job B: 62 minutes The machine breaks down at 69 minutes and takes 19 minutes to repair. Jobs are scheduled using Shortest Processing Time (SPT) first rule. What is the total completion time (makespan) after handling the breakdown?
Step-by-step solution (Breakdown Recovery):

1. Original SPT order: Job E → Job A → Job B → Job D
2. Simulate processing with breakdown:
- Job E: 0 → 35
- Job A: Starts at 35, breakdown at 69 (34 min completed), repair 19 min, resume 4 min → completes at 92
- Job B: 92 → 154
- Job D: 154 → 228

3. Total makespan: 228 minutes
4. Delay caused by breakdown: 19 minutes

Answer: 228 minutes

Key Strategy: Simulate the timeline, account for breakdown during active job processing.
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