Technician A says that excessive end play causes rapid wear of the sealing rings and possibly the sealing ring groove. Technician B says that seal does not rotate in the groove; therefore, the groove could not wear. Which technician is correct

A 3 m aluminum pole is kept at a residential site for construction purposes at 25°C. At night, the temperature of the surroundings drops to 2°C. What is the final length of the aluminum pole? Given the thermal coefficient of aluminum als 23 10 °C

Name the author the "the journey to the centre of the earth"

Which of the following is not necessary a reason to machine a brake drum? A. Taper B. Minor scoring C. Out-of-roundness D. pulsation

The SDS for any chemical used at a job site must be available A. At the job site B. Online line C. At the contractor house D. At the nearest hospital

Significant figures are an indicator of accuracy. a) True b) False

The value of the critical Reynolds number for the flow over a flat plate is 5 x10^5. The significance of the value is: (a) The boundary layer will be turbulent where the Reynolds number is less than this value.

The specifications of an electronic device are 24 / - 0.4 Amps. When the device exceeds specifications the average quality cost is $32.00. A sample of the devices had an average value of 23.9 Amps and a standard deviation of 0.211 Amps.

A vacuum gauge indicates that the pressure of air in a closed chamber is 02 bar (vacuum) The pressure of the surrounding atmosphere is equivalent to 750 in of mercury The density of mercury is 13.95 g / cn and the acceleration of gravity is 9.8.

The Reynolds number for flow over a fixed horizontal flat plate is constant throughout its length. a) True b) False

Briefly describe the function of the thermostatic expansion valve in a vapour compression refrigeration system