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Questions in engineering

📝 Answered - A square steel bar is 50 mm on a side and 250 mm long. It is loaded by an axial tensile force of 200 kN. If E = 200 GPa and v = 0.3, determine the change of volume per unit volume. Options: 1) 0.000823 2) 0.0234 3) 0.0002 4) 0.00016

📝 Answered - Which of the following statements is true regarding modes of operation in vehicles featuring eAWD? A. They have either a transfer case or power transfer unit (PTU). B. They have independent electric drive transmissions. C. The transmission may feature one or two drive motors. D. Both B and C.

📝 Answered - What is the reason for slowing down just before completing a hacksaw cut? A. to keep from dulling the blade B. to prevent the blade from breaking C. to prevent the surface being sawed from slipping D. to prevent injury to hands

📝 Answered - Which larger capacity compressor uses two meshing rotors to compress refrigerant vapor? A. Scroll B. Reciprocating C. Rotary-vane D. Screw

📝 Answered - 11. Tellegen's theorem is applicable to: a) Non-linear, non-reciprocal networks only b) Linear, time-invariant networks only c) Any lumped network satisfying Kirchhoff's laws d) Only DC circuits with independent sources

📝 Answered - What type of refrigeration system is considered a packaged system? A. Reach-in cooler or freezer B. Walk-in cooler or freezer C. Rack system D. Multiplex system

📝 Answered - In which types of refrigeration systems would you find a crankcase pressure regulator? a) High-capacity chillers b) Residential air conditioners c) Reach-in freezers d) Walk-in freezers

📝 Answered - You should never use a punch or chisel on what material?

📝 Answered - Lockout prevents any unauthorized switching to remove and energize unintentionally the isolated equipment. Select one: A. false B. true

📝 Answered - A vertical gate in a dam has the shape of an isosceles trapezoid 8 feet across the top and 6 feet across the bottom, with a height of 5 feet, as shown below. What is the liquid pressure on the gate if the top of the gate is 4 feet below the surface of the water? Hint: Density of water [tex]$=62.4 lb / ft ^3$[/tex]. Round your answer to the nearest pound.