Machine Design Which of the following statement is correct regarding power screws? The efficiency of a self locking screw can not be more than 50% The efficiency of Acme (trapezoidal) thread is less than that of a square thread If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50% Both (A) and (B) The efficiency of a self locking screw can not be more than 50% The efficiency of Acme (trapezoidal) thread is less than that of a square thread If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50% Both (A) and (B) ANSWER DOWNLOAD EXAMIANS APP
Machine Design The dedendum is the radial distance from the Pitch circle to the bottom of a tooth Top of a tooth to the bottom of a tooth Pitch circle to the top of a tooth Addendum circle to the clearance circle Pitch circle to the bottom of a tooth Top of a tooth to the bottom of a tooth Pitch circle to the top of a tooth Addendum circle to the clearance circle ANSWER DOWNLOAD EXAMIANS APP
Machine Design A fast and loose pulley drive is used when Shafts are arranged parallel and rotate in the same directions Shafts are arranged at right angles and rotate in one definite direction Shafts are arranged parallel and rotate in the opposite directions Driven shaft is to be started or stopped whenever desired without interfering with the driving shaft Shafts are arranged parallel and rotate in the same directions Shafts are arranged at right angles and rotate in one definite direction Shafts are arranged parallel and rotate in the opposite directions Driven shaft is to be started or stopped whenever desired without interfering with the driving shaft ANSWER DOWNLOAD EXAMIANS APP
Machine Design The stress in the bar when the load is applied suddenly is __________ as compared to the stress induced due to gradually applied loads. Same Three times Double Four times Same Three times Double Four times ANSWER DOWNLOAD EXAMIANS APP
Machine Design Aircraft body is usually fabricated by Riveting Casting Welding Pre-casting Riveting Casting Welding Pre-casting ANSWER DOWNLOAD EXAMIANS APP
Machine Design A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing. Fully None of these Either A or B Partially Fully None of these Either A or B Partially ANSWER DOWNLOAD EXAMIANS APP
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