成功理工职场英语答案Unit-4

_e_st_a_b_li_s_h_e_d_i_n_1_9_8_6______
j Research and prepare a report about another accident.
Describe what caused the accident (mechanical failure, electrical failure, materials failure, human error, etc.), how the accident could have been avoided, and what happened as a consequence of the accident.
d Read through the text again and complete the sentences
with because or so.
Key
1. The O-ring was brittle __b_e_c_a_u_s_e__the weather was cold. 2. The O-ring was brittle, __so__this allowed hot gases to escape from the
Script
Key
1. SRBs: _c_o_m_p_le_t_e_ly__re_d_e_s_i_g_n_e_d_____________ 2. A new joint design: _s_u_b_je_c_t_e_d_t_o_s_t_ri_n_g_e_n_t _e_x_a_m_i_n_a_tio_n__a_n_d__re_v_ie_w_____ 3. Main space shuttle engines: _p_u_t_th_r_o_u_g_h_m__o_s_t_th_o_r_o_u_g_h_g_r_o_u_n_d_-_te_s_t_in_g_
b Skim through the text quickly to check your answers.
A NASA space shuttle consists of three major components: a winged orbiter that carries both crew and cargo, an external tank containing liquid hydrogen (fuel) and liquid oxygen (oxidizer) for the orbiter’s three main rocket engines, and a pair of large solid-propellant rocket boosters (SRBs).
2. Who was named chairman of the commission? _W__il_lia_m__P_._R__o_g_e_rs_.______________________________________
3. Who set up the Challenger Data and Design Analysis Task Force? _N_A__S_A_._______________________________________________
成功理工职场英语答案Unit-4
Unit 4 Safety, Maintenance, and Quality Control
Lesson 1. What caused the explosion
Lesson 2. The prevention of accidents Lesson 3. Wearing special clothes Lesson 4. The amplitude of motion Lesson 5. Quality and a finished item Lesson 6. A “ total quality control” approach
The SRBs are constructed in four cylindrical sections. These have to be sealed together completely to prevent the escape of the extremely hot by-products of the burning fuel during a launch. The O-rings are rubber rings that play a vital part in sealing the joints.
__p_r_o_g_ra_m__i_n_t_h_e_ir_h_i_st_o_r_y,_e_q_u_i_v_a_le_n_t_t_o_m__o_re__th_a_n__3_6_r_e_a_l _m_i_ss_i_o_n_s____ 4. Office of Safety, Reliability, Maintainability, and Quality Assurance:____
On the day of the launch, the weather was unusually cold and this caused the rubber of one of the O-rings on the joint between the bottom two segments of the right SRB to become brittle. This, combined with the faulty design of the joint, allowed hot gases from the burning solid rocket fuel to escape. The gases and flames burned through the metal that held the SRB in position. When the SRB broke off, it ruptured the side of the external fuel tank. This allowed the liquid hydrogen and oxygen to mix prematurely and this is what caused the explosion.
a. ___________________________________ b. ___________________________________ c. ___________________________________
___________________________________
4. How long did the commission’s investigation take? _F_o_u_r_m__o_n_th_s_.__________________________________________
5. How many people were involved in the investigation? _M__o_re__th_a_n__6_,0_0_0_._______________________________________
the Columbia space shuttle broke up over north-central Texas at an altitude of about 40 miles (60 kilometers) as it was returning from an orbital mission. All seven crew members died in the accident.
SRB. 3. The metal holding the rocket was damaged, __s_o_ the rocket broke
loose. 4. The hydrogen and oxygen mixed and exploded __b_e_c_a_u_s_e__ the rocket
6. When was the commission’s report published? __E_a_rl_y_J_u_n_e__1_9_8_6_. ______________________________________
i Listen to the next part of the interview and complete the notes.
h Listen to an interview with a NASA spokesperson and
answer the questions.
Script
Key
1. When was the Presidential Commission on the Space Shuttle Challenger Accident created? _E_a_rl_y_F_e_b_r_u_a_ry__1_9_8_6_.___________________________________
On January 28, 1986, the Challenger shuttle and its crew of seven (including teacher Christa McAuliffe, who had been selected to be the first private citizen in space) were destroyed shortly after launch from Cape Canaveral, Florida. The primary cause of the loss of the Challenger was the failure of an O-ring seal of a joint on one of the solid rocket boosters.
c Read the first paragraph of the text and, in the diagram,