# A 163 in lb b 167 in lb solution c 132 in lb p 2 tn d

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Chapter 9 / Exercise 30
Electricity for Refrigeration, Heating, and Air Conditioning
Smith
Expert Verified
a.163 in-lbb.167 in-lbSOLUTION:c.132 in-lbP = 2TNd.138 in-lb11(33,000) = 2T(4,250)T = 13.594 ft-lbs.= 13.594(12) = 163.128 in-lbs
60.A drop hammer of 1 ton dead weight capacity is propelled downward by a 12 in. diametercylinder. At 100 psi air pressure, what is theimpact velocity if the stroke is 28 inces?
61.1 kw is equivalent to
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Chapter 9 / Exercise 30
Electricity for Refrigeration, Heating, and Air Conditioning
Smith
Expert Verified
62.Compute for the torsional deflection in degrees of a 110 mm diameter, 1.4 m long shaftsubjected to twist moment of 3 x 106N-mm. The torsional modulus of elasticity is 83000N/mm2.
63.Find the torsional moment (in Newton-mm) developed when the shaft delivers 20 kw at 200rpm.a.0.85 x 106b.1.0 x 106(ans)SOLUTION:c.1.20 x 106P = 2tnd.2.10 x 10620 = 2(T)(200/60)T = 0.955 kN-mT = 0.955 kN-m x (1000N/kN) x (1000mm/m)T = 0.955x 106N-mm
64.Determine the load in KN on a 25mm diameter x 1200 mm long steel shaft if its maximumelongation exceeds 1 mm.
65.Find the thickness of a metal needed is the semi-spherical end of cylindrical vessel 0.70 meterin diameter subjected to an internal pressure of 2.7 N/mm2. The material is mild carbon steeland tensile stress is 69 N/mm2.
66.A 102 mm diameter shaft is driven at 3000 rpm by 300 HP prime mover. The shaft drives a121 cm diameter chain sprocket having 85% output efficiency. Compute the torque n in-lbdevelop in the shaft.
67.Determine the average time to cut by automatic oxy-acetylene (machine) crosswise a 4 ft x 8ft. x 4 in thick steel plate. (Oxy acetylene cutting speed = 9 inches per minute).a.6.85 min b.318 sec (ans)
68.Computes for the induced/compressive stress, in Kpa, of a steel solid shafting of 50 mmdiameter and 800 mm in length that is subjected to an increase of temperature by 80 deg. C.Use k for steel = 0.0000119 m/m-°C. (E=30,000,000 psi = 206,768 Mpa).
69.A mass weighing 56 lbs. Rests on horizontal surface. The force needed to move along thesurface is 20 lbs. Determine the coefficient of friction.
70.Determine the time in seconds, to saw a rectangular magnesium bar 5 in. wide and 2 in. thickif the length of cut is 5 in. The power hacksaw does 120 strokes/min and the feed/stroke is0.127 mm.
71.A car travels with an initial velocity of 10 m/sec or 36 km/hr. If it is decelerating at a rate of 3m/sec-sec, how far, in meters, does it travel before stopping?