Shrinkage allowance on pattern is provided to compensate for shrinkage when
The effective number of lattice points in the unit cell of simple cubic, body centered cubic, and face centered cubic space lattices, respectively, are
The crystal structure of austenite is
The coefficient of performance of electrolux refrigerator is the ratio of
The water, alcohol and ammonia have same refrigerating effect at different altitudes.
The temperature of ammonia after compression in a vapour compression system is
The axial flow compressor is preferred in air-craft gas turbines because of
The effect of friction on the flow of steam through a nozzle is to
In a convergent divergent nozzle, the discharge depends upon the initial conditions of steam and the area of nozzle at throat.
Multi-stage steam turbines are of the
The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)
For a convergent divergent nozzle, the mass flow rate remains constant if the ratio of exit and inlet pressures.........
The critical pressure ratio for initially superheated steam is.......as compared to initially dry saturated steam
The equation TdS=dH-Vdp
The equation dQ=dU+pdW holds good for any process undergone by a closed stationary system.
Exergy is lost due to
The unit of viscosity is
A liquid compressed in cylinder has a volume of 0.04 m⊃3; at 50 kg/cm⊃2; and a volume of 0.039 m⊃3; at 150 kg/cm⊃2;. The bulk modulus of elasticity of liquid is
Which of the following statement is correct?
A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is
Total number of questions : 20
Number of answered questions : 0
Number of unanswered questions : 20
Shrinkage allowance on pattern is provided to compensate for shrinkage when
Your Answer : (Not Answered)
Correct Answer : C
Since metal shrinks on solidification and contracts further on cooling to room temperature, linear dimensions of patterns are increased in respect of those of the finished casting to be obtained. This is called the “shrinkage allowance”. So, the temperature of solid phase drops from freezing to room temperature.
The effective number of lattice points in the unit cell of simple cubic, body centered cubic, and face centered cubic space lattices, respectively, are
Your Answer : (Not Answered)
Correct Answer : B
The effective number of lattice points in the unit cell of
Simple cubic = (1/8) × 8 = 1
Body centred cubic = (1/8) × 8 +1 = 2
Face centred cubic = (1/8) × 8 + (1/2) × 6 = 4
The crystal structure of austenite is
Your Answer : (Not Answered)
Correct Answer : B
Austenite is a solid solution of carbon in ɣ-iron. It has F.C.C structure. It has a solid solubility of up to 2?t 1130⁰C.
The coefficient of performance of electrolux refrigerator is the ratio of
Your Answer : (Not Answered)
Correct Answer : B
No answer description available for this question.
The water, alcohol and ammonia have same refrigerating effect at different altitudes.
Your Answer : (Not Answered)
Correct Answer : B
No answer description available for this question.
The temperature of ammonia after compression in a vapour compression system is
Your Answer : (Not Answered)
Correct Answer : C
No answer description available for this question.
The axial flow compressor is preferred in air-craft gas turbines because of
Your Answer : (Not Answered)
Correct Answer : A
No answer description available for this question.
The effect of friction on the flow of steam through a nozzle is to
Your Answer : (Not Answered)
Correct Answer : C
No answer description available for this question.
In a convergent divergent nozzle, the discharge depends upon the initial conditions of steam and the area of nozzle at throat.
Your Answer : (Not Answered)
Correct Answer : A
No answer description available for this question.
Multi-stage steam turbines are of the
Your Answer : (Not Answered)
Correct Answer : D
No answer description available for this question.
The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)
Your Answer : (Not Answered)
Correct Answer : A
No answer description available for this question.
For a convergent divergent nozzle, the mass flow rate remains constant if the ratio of exit and inlet pressures.........
Your Answer : (Not Answered)
Correct Answer : C
No answer description available for this question.
The critical pressure ratio for initially superheated steam is.......as compared to initially dry saturated steam
Your Answer : (Not Answered)
Correct Answer : B
No answer description available for this question.
The equation TdS=dH-Vdp
Your Answer : (Not Answered)
Correct Answer : D
Since there is no path function in the equation hence the equation holds good for any process.
The equation dQ=dU+pdW holds good for any process undergone by a closed stationary system.
Your Answer : (Not Answered)
Correct Answer : A
When a closed stationary system undergoes a process, this equation holds true.
Exergy is lost due to
Your Answer : (Not Answered)
Correct Answer : D
The decrease in exergy is given by the product of lowest feasible temperature of heat rejection and the additional entropy change in the system.
The unit of viscosity is
Your Answer : (Not Answered)
Correct Answer : B
No answer description available for this question.
A liquid compressed in cylinder has a volume of 0.04 m⊃3; at 50 kg/cm⊃2; and a volume of 0.039 m⊃3; at 150 kg/cm⊃2;. The bulk modulus of elasticity of liquid is
Your Answer : (Not Answered)
Correct Answer : B
No answer description available for this question.
Which of the following statement is correct?
Your Answer : (Not Answered)
Correct Answer : D
No answer description available for this question.
A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is
Your Answer : (Not Answered)
Correct Answer : A
No answer description available for this question.
Total number of questions : 20
Number of answered questions : 0
Number of unanswered questions : 20
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