250+ TOP MCQs on Intake System – Manifolds and Answers

Automotive Engine Auxiliary Systems Question Bank on “Intake System – Manifolds”.

1. What does inlet manifold carry to the engine?
a) Air
b) Fuel
c) Oxygen+ fuel
d) Air+ fuel
Answer: d
Clarification: Manifolds are the separate sets of pipes attached to the cylinder head. Inlet manifold carry the air-fuel mixture and exhaust manifold carry the exhaust gases.

2. Manifolds are connected to which part of the engine?
a) Cylinder
b) Cylinder head
c) Gasket
d) Engine block
Answer: b
Clarification: Manifolds are connected to the cylinder head of the engine. Manifolds have flanges at the end and it is bolted to the engine with the gasket in between.

3. In the petrol engine, the inlet manifold carries the air-fuel mixture from which part to the cylinder?
a) Air filter
b) Fuel injector
c) Fuel pump
d) Carburetor
Answer: d
Clarification: The inlet manifold carries the air-fuel mixture from the carburetor to the cylinders and the manifold must be larger enough to allow sufficient flow for maximum power.

4. The manifold must be larger enough to allow sufficient flow for what?
a) Max power
b) Max emission
c) Min emission
d) Lower torque
Answer: a
Clarification: The inlet manifold carries the air-fuel mixture from the carburetor to the cylinders and the manifold Inner surface must be very smooth such that it should not hold any charge around its surface.

5. Rough interior surfaces of the manifold runners will increase what to the mixture flow?
a) liquidity
b) Velocity
c) Smoothness
d) Resistance
Answer: d
Clarification: Rough interior surfaces of the manifold runners will increase resistance to the mixture flow and the surface of the exhaust manifold is made smooth to minimize the restriction of exhaust gas.

6. What is the another name of Manifold passages?
a) Riser
b) Sprout
c) Guideways
d) Runner
Answer: d
Clarification: Manifold passages are also called a runner. In modern automotive engines, the length of the intake track can be varied by both VLIM and VRIS technology, VLIM stands for Variable Length Intake Manifold, VRIS stands for Variable Resonance Induction System.

7. In modern automotive engines, the length of the intake track can be varied by which technology?
a) VLIM
b) VRIS
c) VIPS
d) Both VLIM and VRIS
Answer: d
Clarification: In modern automotive engines, the length of the intake track can be varied by both VLIM and VRIS technology, VLIM stands for Variable Length Intake Manifold.

8. Exhaust manifold is connected to which part of the engine?
a) Cylinder head
b) Engine block
c) Gasket
d) Muffler
Answer: a
Clarification: Exhaust manifold is connected to the Cylinder head of the engine; exhaust manifolds are usually made to give high efficiency and absorb the noise of high-pressure gas.

9. Exhaust manifolds are usually made of what material?
a) Copper
b) Chromoly
c) Mild steel
d) Cast iron
Answer: d
Clarification: Exhaust manifold is connected to the Cylinder head of the engine, exhaust manifolds are usually made of cast iron material and the exhaust manifold is designed to withstand heat.

10. The exhaust manifold is designed to withstand what?
a) Temperature
b) Gas
c) Heat
d) Contraction
Answer: c
Clarification: Exhaust manifold is connected to the Cylinder head of the engine, exhaust manifolds are usually made of cast iron material and the exhaust manifold is designed to withstand heat. Exhaust manifold has to result in better scavenging.

11. The surface of the exhaust manifold is made smooth to minimize the restriction of what?
a) Exhaust gas
b) Temperature
c) Heat
d) Contraction
Answer: a
Clarification: Rough interior surfaces of the manifold runners will increase resistance to the mixture flow and the surface of the exhaust manifold is made smooth to minimize the restriction of exhaust gas.

12. Modern engines have which valve to direct exhaust gas?
a) Heat risers
b) Thermal valve
c) Thermostatic heat riser
d) Static valve
Answer: c
Clarification: Modern engines have a thermostatic heat riser valve to direct exhaust gas and flange is the part of the manifold that is connected to the Cylinder head.

13. Which part of the manifold is connected to the Cylinder head?
a) Flange
b) Tail flange
c) Manifold
D) Runner
Answer: a
Clarification: Flanges are the type of coupling that is usually used to connect the propeller shafts. Flange is the part of the manifold that is connected to the Cylinder head.