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19th February 2016, 02:41 PM
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| Re: Operator Cum Technical Trainee Exam model paper
SAIL Paper pattern consist of objective queries divided into two sections. Part-I consists of aptitude queries whereas Part-II are going to be having questions from relevant discipline. Aptitude test 150 marks Quantitative Aptitude (35 marks) English Verbal ability (35 marks) Reasoning (45 marks) General awareness (35 marks) Relevant Engineering Discipline (Technical) 100 marks Few question for SAIL Operator Cum Technical Trainee Exam model paper: Ques: The efficiency and work ratio of a simple gas turbine cycle are A. low B. very low C. high D. very high Ques: The unit of angular acceleration is A. N-m B. m/s C. m/s2 D.rad/s2 Ques: Which of the following is the lightest and most volatile liquid fuel? A. Gasoline B. Kerosene C. Fuel oil D. Nitrogen Ques: The thermal efficiency of regenerative feed water cycle is ? a) same as simple Rankine cycle thermal efficiency b) less than simple Rankine cycle thermal efficiency c) greater than simple Rankine cycle thermal d) none of the above Answer c Ques: In regenerative feed heating cycle, feed water is heated by (a) extracted steam from the turbine (b) exhaust gases from boiler (c) heaters (d) all of the above Answer a Ques: In a regenerative feed heating cycle, the greatest efficiency can be obtained when steam is extracted only from the last stage of steam turbine (a)when steam is extracted only from the last stage of steam turbine (b) when steam is extracted only from the first stage of steam turbine (c) when steam is extracted only one suitable point of steam turbine (d)when steam is extracted from several places in different stages of steam turbines Answer d Ques: The following is not correct for regenerative feed heating cycle: (a) It reduces the heat rate, and hence reduces Operating cost (b) It increases the complication of the plant (c) It reduces irreversibly, thus heating process in boiler tends to become revers (d) It requires less steam flow rate for a given output power Answer d Ques: In regenerative feed heating (a) larger capacity boiler is required for a given output (b) smaller capacity condenser is required for a given output (c) turbine output decreases due to extraction of steam (d) all of the above Answer d Ques: The following is correct for regenerative feed heating cycle (a) It reduces turbine blades erosion due to moisture. (b) It requires less maintenance. (c) it increases turbine output power for given steam flow rate (d) It increases temperature range in the boiler, thus more thermal stresses are - in the boiler Answer a Ques: The reheating of steam in a turbine (a) increases the efficiency of the turbine (b) increases the output power from the turbine (c) reduces corrosion and erosion of turbine blades (d) all of the above Answer d Ques: The following is not correct for reheating cycle of steam turbine (a) It requires less floor space (b) It increases the work done through the turbine (c) It reduces the erosion of the turbine blades (d) It increases the thermal efficiency of the plant Answer a Ques: In reheating cycle, (a) fuel consumption is increased by 4 to % (b) it is preferred for low capacity plants (c) the complexity of operation and control increases (d) all of the above Answer C Ques: The law which states that heat and work mutually convertible is known as (b) first law of thermodynamics (a) zeroth law of thermodynamics (c) second law of thermodynamics (d) third law of thermodynamics answer b Ques: According to first law of thermodynamics (a) network can be produced during cycle without some heat supply. (b) network cannot be produced during a cycle without some heat supply. (c) network cannot be produced during a cycle with some heat supply. (d) none of the above. answer b Ques: A perpetual motion machine of first kind (defined as a machine which produces power without consuming any energy) is impossible according to (b) first law of thermodynamics (a) zeroth law of thermodynamics (c) second law of thermodynamics (d) none of above answer b Ques: If all the variables of a stream are independent of time it is said to be in (a) steady flow (b) unsteady flow (c) constant flow (d) uniform flow answer a Ques: The first law of thermodynamics for steady flow (a) energy entering-energy leaving a control volume +change in stored energy. (b) heat energy + work done +change in internal energy (c) heat energy-work done energy balance for a specified mass of fluid Answer: a Ques: A definite area or space where some thermodynamic process takes place is known (a) thermodynamic cycle (c) thermodynamic (b) thermodynamic system process (d) law of thermodynamic Answer: b Ques: In an open thermodynamic system, (a) neither the heat and work nor the mass cross the boundary of the system (b) heat and work cross the boundary of system but not mass. (c) mass cross the boundary of system but not heat and work. (d) both the heat and work as well as mass of working substances cross the boundary of the system. Answer: d Ques: A thermodynamic system is refereed to be an isolated system when there s transfer of across the system boundary (a) only mass (b) only heat and work (c) both mass and energy (d) neither mass nor energy Answer: d Ques: when two bodies are in equal temperature with third body they are also equal temperature with each other This statement known as (a) zeroth law of thermodynamics (b) first law of thermodynamics (c) second law of thermodynamics (d) third law of thermodynamics Answer: a Ques: A system having single phase is called: (a) isolated system (b) closed system (c) homogeneous system (d) heterogeneous system Answer: c Ques: Zeroth law of thermodynamics deals with (a) conservation of energy (b) conservation of mass (c) entropy (d) thermal equilibrium Answer: d SAIL Operator Cum Technical Trainee Exam model paper       |