MCQOPTIONS
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				| 1. | 
                                    Pressure of the order of 10″‘ torr can be measured by_______________ ? | 
                            
| A. | Bourdon tube | 
| B. | Pirani Gauge | 
| C. | micro-manometer | 
| D. | ionisastion gauge | 
| E. | McLeod gauge | 
| Answer» E. McLeod gauge | |