1. 1 mKj‡K ï‡f”Qv I ¯^vMZg

2. 2 cwiwPwZ Rbve †gvt kvn& Rvnvb Rbve †gvt Av‡bvqvi †nv‡mb Rbve Avdmvix Avn‡g` Rbve †Rmwgb Aviv Rbve dviæK BKevj

3. 3 Mvox cï PvwjZ Mvwo BwÄb PvwjZ Mvwo BwÄb wfwWI

4. 4 welqt A‡Uv‡gveBj †UK‡bvjwR 1g ce© cv‡Vi D‡Ïk¨ 4-†÷ªvK Bwćbi Kvh©c×wZ m¤ú‡K© avibv

5. 5 wkLYdj 4-†÷ªvK Bwćbi Kvh© c×wZ eY©bv Ki‡Z cvi‡e| wUwWwm e¨vL¨v Ki‡Z cvi‡e| wewWwm e¨vL¨v Ki‡Z cvi‡e| MÖnb fvj‡ei KvR e¨vL¨v Ki‡Z cvi‡e| wbM©gb fvj‡ei KvR e¨vL¨v Ki‡Z cvi‡e|

6. 6 MÖnb †÷ªvK ms‡KvPb †÷ªvK cvIqvi †÷ªvK wbM©gb †÷ªvK 4-‡÷ªvK †c‡Uªvj BwÄb mvB‡K‡ji avc mg~n wUwWwm wewWwm wmwjÛvi QwewUi cÖwZwU Ask jÿ¨ Ki Ges fvj‡ei Ae¯’vb ‡`L|

7. 7 MÖnb †÷ªvK MÖnb fvje †Lvjv Ges wbM©gb fvje eÜ| wc÷b wb‡Pi w`‡K hvq Ges A‡a©K Ny‡i (180 wWwMÖ) wmwjÛv‡i evq~ ïb¨Zv ˆZix nq| evZvm I †c‡Uªv‡ji wgkÖb wmwjÛv‡i cÖ‡ek K‡i|. evZvm I †c‡Uªvj MÖnb fvje ¯úvK© cøvM wbM©gb fvje ms‡KvPb cÖ‡Kvô wc÷bµ¨vsK k¨vd&U QwewUi cÖwZwU Ask jÿ¨ Ki Ges fvj‡ei Ae¯’vb ‡`L|

8. 8 ms‡KvPb †÷ªvK Dfq fvje eÜ wc÷b Dc‡ii w`‡K hvq Ges µ¨vsK k¨vd&U A‡a©K Ny‡i (180 wWwMÖ)| evZvm I †c‡Uªv‡ji wgkÖb ms‡KvwPZ nq|. MÖnb fvje ¯úvK© cøvM wbM©gb fvje ms‡KvPb cÖ‡Kvô wc÷b QwewUi cÖwZwU Ask jÿ¨ Ki Ges fvj‡ei Ae¯’vb ‡`L|

9. 9 cvIqvi †÷ªvK Dfq fvje eÜ| ¯úvK© cøvM †_‡K ¯úvK© ‰Zix nq d‡j wgkÖ‡bi `nb N‡U| wc÷b wb‡Pi w`‡K hvq Ges µ¨vsK k¨vdU A‡a©K Ny‡i (180 wWwMÖ) MÖnb fvje ¯úvK© cøvM wbM©gb fvje ms‡KvPb cÖ‡Kvô wc÷b QwewUi cÖwZwU Ask jÿ¨ Ki Ges fvj‡ei Ae¯’vb ‡`L|

10. 10 Exhaust valve opens. Piston move up, crankshaft makes ½ turn. Exhaust gases are pushed out polluting the atmosphere. wbM©gb †÷ªvK wbM©gb fvje †Lv‡j wc÷b Dc‡ii w`‡K hvq d‡j †cvov M¨vm †ei nq µ¨vsK k¨vd&U A‡a©K Ny‡i Nyb©b(180 wWwMÖ) m¤úbœ nq| & MÖnb fvje ¯úvK© cøvM wbM©gb fvje ms‡KvPb cÖ‡Kvô wc÷b ‡cvov M¨vm evwni nq QwewUi cÖwZwU Ask jÿ¨ Ki Ges fvj‡ei Ae¯’vb ‡`L|

11. 11 GB 4-†÷ªv‡K µ¨vsK k¨vd&U †gvU 2 evi (720 wWwMÖ) Ny‡i 1 wU mvB‡Kj mgvß K‡i Ges cieZx© mvB‡K‡ji Rb¨ wd‡i hvq| G Kvi‡bB G BwÄb‡K 4- †÷ªvK BwÄb ejv nq| G c×wZ‡Z GKwU 4-‡÷ªvK †c‡Uªvj BwÄb Gi Kvh©µg m¤úbœ nq|

12. 12 4 †÷ªvK mvB‡Kj †c‡Uªvj BwÄb Gwb‡gkb

13. 13 cvV g~j¨vqb wc÷b PjvP‡ji Da© mxgvi bvg Kx? wc÷b PjvP‡ji wb¤œ mxgvi bvg Kx? MÖnY fvjf KLb †Lv‡j KLb eÜ nq? wbM©gb fvje KLb †Lv‡j Ges KLb eÜ nq? 4- †÷ªvK BwÄb Kv‡K e‡j eY©bv Ki?

14. 14 evoxi KvR GKwU 4 †÷ªvK †c‡Uªvj Bwćbi wPÎ AsKb K‡i cÖwZwU †÷ªv‡Ki Kvh© c×wZ eY©bv Ki|

15. 15 ab¨ev`