Session 7: Tightening of Fasteners (Nuts, Bolts and Screws)
Unit 5: Regular Maintenance of an Engine
Textual Question-Answers
Check Your Progress
A. Fill in the blanks
1. Tightening of cylinder head is required to avoid …………… .
Ans: leakage
2. Loose induction manifold may cause emission …………… .
Ans: leakage
B. Multiple choice questions
1. Loose induction manifold may create……………….
(a) vacuum leakage
(b) pressure leakage
(c) hydraulic leakage
(d) None of the above
Ans: (a) vacuum leakage
2. Loose induction manifold may cause…………
(a) emission leakage
(b) vacuum leakage
(c) Both of the above
(d) None of the above
Ans: (c) Both of the above
3. The material and tools required for tightening of fastenerinclude……………
(a) socket spanner
(b) tommy bar
(c) extension bar or rod
(d) All of the above
Ans: (d) All of the above
4. Mallet is made of…………….
(a) iron
(b) wood
(c) steel
(d) aluminium
Ans: (b) wood
C. Answer the following questions
1. What are the different types of tools used in tightening of fasteners?
Ans: The tools used in tightening of fasteners include spanners, socket spanners, torque wrench, tommy bar, extension rod, screwdrivers, and mallet.
2. How is the torque wrench set?
Ans: The torque wrench is set by rotating the handle to the required torquevalue indicated on the scale and locking it in position before tightening thefastener.
3. List the steps used in tightening.
Ans: The steps include cleaning the fastener and threads, placing thecomponent correctly, tightening the fasteners by hand initially, tightening in aproper sequence, applying the specified torque using a torque wrench, andfinally rechecking the tightness.
