**QUESTION**

**1. Neglecting spoke effect, calculate the energy stored
in the rim of a flywheel made of cast iron 24 in. in diameter,
having a rim 5 inches wide by 4 inches deep when running at 1000
rpm. The internal radius of the rim is 8 inches. Note density of
the material is 450 lb/ft3.**

**A.40122.28 ft-lb**

**B.38614.21 ft-lb**

**C.58234.36 ft-lb**

**D.50165.32 ft-lb**

**2.A wet, steel-backed asbestos clutch with hardened
steel plates is being designed to transmit 33 N-m. The coefficient
of friction is 0.12. Slip will occur at 300% of the rated torque.
The maximum and minimum friction surface diameters are 115mm and
65mm respectively. The contact pressure is 700kPa. How many plates
are needed?**

**A.4**

**B.6**

**C.3**

**D.5**

**3Find the root area of a 1inch bolt. which has 8V
threads per inch**

**A.0.345 sq in**

**B.0.785 sq in**

**C.0.482 sq in**

**D.0.314 sq in**

**4,A large hangar door is required to be stopped at the
end of its travel by a constant force snubber. The door weighs
10000 lbs and its speed is 1 ft/s when it strikes the snubber. What
constant force is required by the snubber to stop the door within a
distance of 1ft.**

**A.310.56lbs**

**B.301.65lbs**

**C.155.28lbs**

**D.128.55lbs**

**5. A heavy duty sleeve bearing is used with good
ventilation. The bearing has a diameter of 2in and a length of 4in.
The load on the bearing is 2200lb. A shaft rotates 200 rpm in the
bearing. Find the heat radiating capacity. The coefficient of
friction is 0.02**

**A.0.7404 BTU/min sq in**

**B.0.8765 BTU/min sq in**

**C.0.7654 Btu/min sq in**

**D.0.8043 Btu/min sq in**