What is the hydraulic diameter of a 20 inch diameter pipe that is half full?
(A) 10 inches
(B) 2.5 inches
(C) 20 inches
(D) 5 inches
Which of the following are not an intensive property? Pressure Velocity Volume Density Kinetic Energy
（A）I, II & III （B） IV & V （C） I, II & IV （D） III & V
Correct Answer: D
Which of the following is FALSE with regards to creep I. May involve the sliding of whole grains II At high stresses creep is controlled by the movement of vacancies. III Also known as hot flow IV Creep is a time dependent deformation
(A) I (B) II (C) III (D) IV
Correct Answer: C
What cycle is the most efficient?
(A) Carnot (B) Brayton (C) Diesel (D) Otto
Correct Answer: A
More PE Exam Questions
- 1
The magnitude(N) of the resultant of the three coplanar forces, A, B, and C, is most nearly:
- 2
A piston inside a cylinder undergoes an isentropic compression with the following values.
$latex p_1= 4.57 \frac{N}{cm^2}$$latex p_2= 34.07 \frac{N}{cm^2}$
$latex V_1 = 257 cm^3$
If the specific heat ratio (k) is 1.4, What is the compressed volume? - 3How much heat is dissipated when a current of 15 amps passes through a 4 ohm resistor?
- 4
A tube that is 10 feet long and 2 feet in diameter is placed in an air stream. The flow of the air is at a speed of 15 ft/s and is perpendicular to the long axis of the tube. If the coefficient of drag is 1.3 and the density of air is 0.075 lbm/ft3 What is the drag on the cylinder?
- 5A group of dog pulls a sled across a snow covered surface. It takes 5 hours to pull the 200 kg sled 100 kilometers. If the static friction is 0.4 and the dynamic friction is 0.1 what is the average power exerted by the dog sled team?