1. At which temperature does the thermostat valve open:
(A) 50°C
(B) 60°C
(C) 80°C
(D) 120°C
2. At which pressure does the radiator pressure cap open:
(A) Atmospheric pressure
(B) 5 PSI
(C) 15 PSI
(D) 30 PSI
3. By increasing pressure on engine coolant, its boiling point will:
(A) Increase
(B) Decrease
(C) Remain same
(D) Have no effect
4. Thermo time switch is fitted on:
(A) Upper tank
(B) Lower tank
(C) Thermostat body
(D) Cylinder head
5. To adjust loose fan belt, adjuster is fitted:
(A) On water pump
(B) On crankshaft
(C) On alternator
(D) Fan motor
6. If fan belt is loose, then engine coolant temperature will:
(A) Increase
(B) Decrease
(C) No change
(D) Remain constant
7. If engine coolant hose pipe squeezes, the reason is:
(A) Air in cooling system
(B) Faulty pressure valve
(C) Faulty vacuum valve
(D) Faulty hosepipe
8. If engine overheated, then what should you do:
(A) Quickly switch off the engine
(B) Open the radiator cap
(C) Throw water on radiator
(D) Open the thermostat valve
9. Thermostat valve is fitted between:
(A) Water pump inlet and radiator
(B) Water pump outlet and water jacket
(C) Water jacket outlet and radiator
(D) Cylinder head and cylinder block
10. Which chemical is used for engine coolant:
(A) Ethylene glycol
(B) Methyl alcohol
(C) Ethyl alcohol
(D) Sodium nitrate
11. Which part of cooling system is used to increase coolant boiling point:
(A) Drain plug
(B) Water jacket
(C) Vacuum valve
(D) Pressure valve
12. Fins are built around radiator tubes to:
(A) Increase air velocity
(B) Hindrance in air passage
(C) Increase surface area of tube
(D) Decrease surface area of tube
13. Which type of water pump is used in vehicles:
(A) Gear type
(B) Plunger type
(C) Centrifugal type
(D) G rotor type
14. Thermostat valve is used to:
(A) Prevent the coolant from boiling
(B) Allow the engine to warm up quickly
(C) Indicate the coolant temperature
(D) Pressurize the system
15. When air pressure increases on engine coolant, the coolant boiling point will:
(A) Increase
(B) Decrease
(C) Pressure has no effect on boiling point
(D) Both a and b