Practice Exams ChE - 11

1. If a man touches two metals w/c were kept together at room temperature, why would one metal feel colder than the other?
a. one has high heat transfer coefficient
b. one has a lower temperature
c. one has a high thermal conductivity
d. ???

2. What is the center of the circle defined by the equation x2 + y2 - 4x + 8y = 5?
a. (-2,4)
b. (2,-4)
c. ???
d. none of these

3. A 1-Newton load is applied at the midpoint of a rope attached to 2 posts. If the load caused the rope to sag, the rope can be brought back to the initial position if
a. the tension on the rope is increased by 1 Newton
b. this is not possible
c. the tension on the rope is increased by 2 Newton’s
d. the tension on the rope is increased by 3 Newton’s

4. An unbiased coin is tossed 6 times. What is the probability of getting exactly 3 heads?
a. ???
b. ???
c. none of these
d. 5/16

5. A expects to be paid P6 per month for every P5 borrowed. What is the effective annual interest?
a. none of these
b. 240%
c. 79.2%
d. 792%