500 Flashcards
What is the most common dryer used which consists of a rotating cylinder inside which the materials flow while getting in contact with hot gas?
Rotary dryer
What is the total heat of the air a function of?
WB temperature, DP temperature, and WB depression
What is the ratio of the mass of water-vapor in air and the mass of air if it is saturated called?
Humidity ratio
At what skin temperature do hands feel painfully cold?
10 deg C
What is the refrigerant used in steam jet cooling?
Water
What is the boiling point of Freon-12 at atmospheric pressure?
21 oF
Which type of water cooling is NOT wise refilering?
Double shell
What component of the absorption refrigeration system cools the solution by cooling water?
Absorber
What temperature range is the cascade refrigeration cycle often used for in industrial processes?
Below -46 oC
What type of refrigerant control is designed to maintain a pressure difference while the compressor is operating?
Capillary tube
By how much does the power consumption of the compressor decrease for each 30C drop in the temperature inlet air to the compressor?
1 percent
What is the modern way of detecting air compressor leaks?
Acoustic leak detector
For the foundation of stacks, what is the maximum pressure on the soil equal to?
Pressure due to the weight and wind movement
What should foundation bolts of specified size be surrounded by?
A pipe sleeve with an inside diameter of at least 3 times the diameter of anchor bolt
What happens to the back work ratio for multi-stage compression of an ideal Brayton cycle?
It decreases
What type of turbine has a specific speed below 5?
Impulse turbine
