Carbon tetrachloride has a drinking water standard with a Maximum Contaminant Limit (MCL) of 0.005 mg/L. Potency factor is 0.13 (mg/kg-day)-1 for oral route. Assuming a 70 kg person drinking 2 L for 70 years, what is the upper-bound cancer risk for an individual?

A. 1 in 10,000
B. 1 in 100,000
C. 2 in 10,000
D. 2 in 100,000

An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)

Journeyman training is usually related (clo2) a)-to specific tasks b)-to cost analysis of maintenance task c)-to control process to ensure quality d)-to installation of machinery

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.