- Trivia
- Midterm #1
Questions
96 Questions1/96
Which of the following are methods of accomplishing valves timing?
2/96
When the piston is moving down in the cylinder and neither valve is open that cylinder is on the ____ stroke
3/96
The camshaft makes ____ revolutions for every revolution of the crankshaft
4/96
The parts of the piston between the rings are called the:
5/96
The part of the valve train that causes the valves to close is called the valve-
6/96
If a camshaft timing gear has 21 teeth, the crankshaft timing gear will have ____teeth.
7/96
The type of motion that goes back and forth is known as ____ motion.
8/96
When referencing a cam in block engine, the part of the valve train riding directly on the cam lobe is the-
9/96
The ____ is the part of the crankshaft which extends out the front of the engine block
10/96
On most engines that use 2 valves per cylinder, the intake valve is ____ than the exhaust valve
11/96
The volume swept by the pistons, or theoretically taken in during one power cycle is known as:
12/96
The actual amount taken into the cylinder compared to the amount theoretically taken in is known as:
13/96
In a typical vehicle engine, how many strokes make up a complete cycle?
14/96
The high point on the camshaft is called a:
15/96
Tech a: some engines with VVT use phasers. Tech b: phasers are only used in Star Trek. Which is correct?
16/96
Of the parts listed below, the one causing the valve train to open a valve is:
17/96
Engine blocks can be manufactured using which methods?
18/96
Tech a: in modern engines the crankshaft changes the reciprocating motion of the pistons into usable rotary motion. Tech b: says that the throw on the crankshaft will determine stroke.
19/96
Tech a: expansion area of the fuel tank is 1-5% of the volume. Tech b: the expansion area prevents raw gasoline from escaping from the fuel system. Which is correct?
20/96
In a four stroke cycle, piston driven engine, which of the following is NOT a type of combustion chamber design?
21/96
A rotating force is called:
22/96
The area of the engine block where the camshaft rotates, and the oil pan covers, is known as the:
23/96
Tech a: cylinders will generally wear in a taper. Tech b: sometimes the wear is so great, the cylinder will need to be sleeved. Which is correct?
24/96
Tech a: a common location for a camshaft is in the engine block. Tech b: says a common location for a camshaft is on the top of the cylinder head. Which is correct?
25/96
The thrust bearing surface is located on one of the main bearings to control thrust loads caused by:
26/96
The purpose of casting steel struts into an aluminum piston is to:
27/96
Tech a: if a crankshaft rotates 5 times then the camshaft rotates 20. Tech b: if the camshaft rotates 5 times the camshaft will rotate 2 1/2 times. Who is correct?
28/96
Discussing “top tier” gasoline. Tech a: this fuel exceeds the quality standards than the regular fuel. Tech b: this fuel contains enough detergents to keep intake valves clean. Which is correct?
29/96
Valve timing refers to when the valves open and close in relation to ____ position
30/96
Automotive and light duty truck pistons typically use ____ compression rings and one oil ring
31/96
A hypereutectic piston has a higher:
32/96
The part that fits between the cylinder head and the engine block is known as the :
33/96
The area in the cylinder, directly above the piston, at TDC is called the:
34/96
Which of the following are always located in the combustion chamber?
35/96
Gasoline and diesel are extracted from crude oil by a process known as:
36/96
The device that measures horsepower is called a:
37/96
Cylinder 1 is generally____
38/96
A 4-cylinder engine fires one cylinder at every ____ degrees of crankshaft rotation.
39/96
Which of the following does not apply to torque
40/96
The ____ connects the piston to the crankshaft.
41/96
Tech a: a rocker arm will cause the valve to move in the opposite direction of the push rod. Tech b: a rocker arm will cause the valve to move in the same direction of the push rod. Who’s correct?
42/96
In modern automobile engines, the intake and exhaust manifolds typically bolt to the:
43/96
All cylinder heads have ____ into which the valve stem fits
44/96
E85 means that the fuel is made from:
45/96
The device that is used to seal openings in the block where the sand was removed are called the:
46/96
Higher octane fuels are typically used in engines with:
47/96
In a typical oil control ring, how many pieces are generally used?
48/96
If the cam timing is advanced from the stock setting:
49/96
Tech a: the research octane number is higher than the motor octane number. Tech b: the octane rating posted on fuel pumps is and average of the two ratings. Which is correct?
50/96
Tech a: connecting rods must be marked for their correct position in an engine before disassembly. Tech b: pistons are marked to show a forward facing direction. Who’s correct?
51/96
The amount of time in degrees that both intake and exhaust valves are open; at the same time is known as:
52/96
Tech a: horsepower and torque are the same. Tech b: volumetric efficiency and cubic inch displacement are the same. Who’s correct?
53/96
Pressed in valve seats are commonly used on ____ cylinder heads.
54/96
A forged crankshaft ____
55/96
A flex fuel vehicle can be identified by:
56/96
Tech a: there are always twice as many teeth on the camshaft gear as there are on the crankshaft gear. Tech b: says that the camshaft gear turns at one half the crankshaft speed. Who’s correct?
57/96
Tech a: if sodium filled valves are damaged they can explode and/or catch on fire if exposed to water. Tech b: they are used because they operate cooler. Who’s correct?
58/96
Modern automotive engine blocks must have:
59/96
Tech a: propane is toxic. Tech b: propane is stored in vessels exceeding 3000 psi. Who’s correct?
60/96
Which of the following fuels have the highest octane ratings?
61/96
The diameter of the cylinder is called the:
62/96
Tech a: the top of the piston is called the skirt. Tech b: the side of the piston is called the head. Who’s correct?
63/96
The ____ is the part of the valve which contacts the seat
64/96
A normal engine loses about _____ power per 1000 feet of altitude
65/96
An SOHC V-8 engine has how many camshafts?
66/96
A DOHC V-6 has how many camshafts
67/96
For all 4 stroke engines, there is a minimum of ____valves per cylinder.
68/96
If a cylinder is bored out, the amount of oversize is added to the original ____ to determine the new displacement
69/96
Tech a: hydraulic lifters are used because they operate quietly due to zero valve lash. Tech b: they adjust automatically. Who’s correct?
70/96
When the piston is moving up and neither valve is open, the cylinder is on the:
71/96
On a crankshaft, to prevent engine vibration, the ____ counteracts the weight of the rod journal, connecting rod and piston assembly.
72/96
The cylinder volume when the piston is at BDC divided by cylinder volume when the piston is at TDC is known as:
73/96
Tech a: when going to high altitudes, engines produce lower power. Tech b: most engine control systems can compensate the air-fuel mixture for changes in altitude. Who’s correct?
74/96
The part of the engine block where the cylinder head attaches is called the:
75/96
The ____ is a heavy, rubber-mounted wheel typically attached to the crankshaft snout.
76/96
The place where the piston stops furthest from the centerline of the crank is known as:
77/96
The intake valve opens at 39 deg BTDC and closes at 71 deg ABDC. The exhaust valve opens at 78 deg BBDC and closes at 47 deg ATDC. Which is correct?
78/96
Tech a: bearings used in an engine are known as friction bearings. Tech b: a thin film of oil separates the bearings from the journals. Who’s correct?
79/96
How many rotations of the crankshaft are required to complete each stroke of a four-stroke cycle engine?
80/96
What color is diesel fuel dyed if it’s for off-road use only?
81/96
When refueling a CNG vehicle, why is it recommended that the tank be filled to a high pressure?
82/96
Which of the following are materials and or methods for rocker arms?
83/96
Tech a: all engines use lifters. Tech b: engines with OHC commonly use a timing belt. Who’s correct?
84/96
On engines which use pushrods, there will always be :
85/96
The rate at which work is done is called:
86/96
Connecting rods. Tech a: the big end attaches to the crankshaft. Tech b: says that they are typically made of cast or forged iron. Who’s correct?
87/96
The block deck is the ____
88/96
The purpose of the piston compression ring is to:
89/96
Tech a: cast iron cylinder liners are often cast into an aluminum block. Tech b: the liners are often pressed into the aluminum block. Who’s correct?
90/96
Hydraulic lifters or lash adjusters, may not bleed down properly and cause an engine miss if ____.
91/96
When the piston is moving up and one valve is open, that cylinder is in the ____ stroke.
92/96
The part of the reciprocating assembly that attaches the piston to the connecting rod is known as the :
93/96
Largest moving part in an engine is called the
94/96
On the typical automotive engine camshaft, there are at least ____ lobes for each cylinder.
95/96
Which of the following is the correct 4 stroke cycle?
96/96