Process Equipment and Plant Design Minimum tube pitch recommended for shell and tube heat exchangers is about __________ times the outside diameter of the tube. 2.5 1.75 1.25 3.5 2.5 1.75 1.25 3.5 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design To keep the power input constant for a stirred vessel operating under fully developed turbulent flow conditions (constant power number), if the impeller diameter is increased by 20%, the impeller speed should be decreased by a factor of (1.2)2/3 (1.2)3/5 (1.2)5/3 (1.2)3/2 (1.2)2/3 (1.2)3/5 (1.2)5/3 (1.2)3/2 ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Elastic failure of a material occurs, when the tensile stress equals yield strength, yield point or the elastic limit. Also, the elastic failure occurs according to maximum strain theory, when the maximum tensile strain equals (where, σ = yield strength and E = modulus of elasticity) E Σ/E E/σ Σ E Σ/E E/σ Σ ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design The design stress, which is more than the damaging stress, is the least unit stress that will render a member unfit for service before the end of its normal life. The design stress factor or factor of safety indicates the margin between design stress and the __________ stress. None of these Damaging Working Allowable None of these Damaging Working Allowable ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design The ratio of the largest load in a test to the original cross-sectional area of the test specimen is called the __________ stress. Yield point Ultimate Breaking None of these Yield point Ultimate Breaking None of these ANSWER DOWNLOAD EXAMIANS APP
Process Equipment and Plant Design Needle valves are generally not used for Very accurate flow control Smaller sizes of pipe High pressure throttling service Very large diameter pipes Very accurate flow control Smaller sizes of pipe High pressure throttling service Very large diameter pipes ANSWER DOWNLOAD EXAMIANS APP
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