Q. 48 A reversible heat engine receives 2 kJ of heat from a reservoir at 1000...

      

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Q. 48 A reversible heat engine receives 2 kJ of heat from a reservoir at 1000 K and a certain amount of heat from a reservoir at 800 K. It rejects 1 kJ of heat to a reservoir at 400 K. The net work output (in kJ) of the cycle is (A) 0.8 (B) 1.0 (C) 1.4 (D) 2.0 Q. 50 Jobs arrive at a facility at an average rate of 5 in an 8 hour shift. The arrival of the jobs follows Poisson distribution. The average service time of a job on the facility is 40 minutes. The service time follows exponential distribution. Idle time (in hours) at the facility per shift will be (A) 5/5/7 (C) 57 75 (B) 14 10 (D) 3 Q. 51 A metal rod of initial length Lo is subjected to a drawing process. The length of the rod at any instant is given by the expression, L(t) = Lo(1+), where t is the time in minutes. The true strain rate (in min) at the end of one minute is in the Q. 53 IT8 For the given assembly: 25 H7/g8, match Group A with Group B P. Q. Group A H Group B I. Shaft type II. Hole type R. IT7 III. Hole tolerance grade S. g (A) P-I, Q-III, R-IV, S-II (C) P-II, Q-III, R-IV, S-I IV. (B) P-I, Q-IV, R-III, S-II (D) P-II, Q-IV, R-III, S-I Shaft tolerance grade Q. 48 A reversible heat engine receives 2 kJ of heat from a reservoir at 1000 K and a certain amount of heat from a reservoir at 800 K. It rejects 1 kJ of heat to a reservoir at 400 K. The net work output (in kJ) of the cycle is (A) 0.8 (B) 1.0 (C) 1.4 (D) 2.0 Q. 50 Jobs arrive at a facility at an average rate of 5 in an 8 hour shift. The arrival of the jobs follows Poisson distribution. The average service time of a job on the facility is 40 minutes. The service time follows exponential distribution. Idle time (in hours) at the facility per shift will be (A) 5/5/7 (C) 57 75 (B) 14 10 (D) 3 Q. 51 A metal rod of initial length Lo is subjected to a drawing process. The length of the rod at any instant is given by the expression, L(t) = Lo(1+), where t is the time in minutes. The true strain rate (in min) at the end of one minute is in the Q. 53 IT8 For the given assembly: 25 H7/g8, match Group A with Group B P. Q. Group A H Group B I. Shaft type II. Hole type R. IT7 III. Hole tolerance grade S. g (A) P-I, Q-III, R-IV, S-II (C) P-II, Q-III, R-IV, S-I IV. (B) P-I, Q-IV, R-III, S-II (D) P-II, Q-IV, R-III, S-I Shaft tolerance grade